Code Line
stringclasses 57
values | User Explanation
stringclasses 692
values | Line-Explanation in PCEX
stringclasses 131
values | Annotation Score
float64 1
5
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int remainingSeconds = seconds % 60;
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The modulus function gets the remainder.
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Note that the % operator returns the remainder of the division.
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int remainingSeconds = seconds % 60;
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The modulus function gets the remainder.
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To obtain the remaining seconds after taking away the minutes, we have to take the remainder of the seconds divided by 60.
| 3 |
String fullName = "John Smith"
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Assigns the name-string to "fullName"
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We define a string variable to hold the name.
| 3 |
System.out.println(seconds + " seconds is " + minutes + " minutes and " + remainingSeconds + " seconds.");
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Prints out the seconds int and prints out how many minutes and remaining seconds that the int seconds is equal to.
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This statement prints to the default standard output stream the minutes and remaining seconds from the input amount of time in seconds.
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System.out.println(seconds + " seconds is " + minutes + " minutes and " + remainingSeconds + " seconds.");
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Prints out the seconds int and prints out how many minutes and remaining seconds that the int seconds is equal to.
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The printed text is followed by the end-of-line character at the end.
| 2 |
String firstInitial = fullName.substring(0, 1);
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finds the first character in the string fullname
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We need to extract the first letter from the first name.
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String firstInitial = fullName.substring(0, 1);
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finds the first character in the string fullname
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We do this by calling the substring(0,1) method.
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int num = 15;
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Initializes the int num to 15
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We define variable num to store the number that we want to find its smallest divisor.
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int num = 15;
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Initializes the int num to 15
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We could initialize it to any positive integer greater than 1.
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int num = 15;
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Initializes the int num to 15
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In this program, we initialize variable num to 15.
| 5 |
int divisor = 2;
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Initializes the integer divisor to 2
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We initialize variable divisor by 2 because we want to find the smallest divisor except 1.
| 4 |
int divisor = 2;
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Initializes the integer divisor to 2
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We define variable divisor to store the smallest divisor of the number.
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while (num % divisor != 0) {
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Starts a while loop that performs as long as num modulus divisor isn't equal to 0
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Since we don't know ahead of time how many times the loop will be repeated, we need to use a while loop.
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while (num % divisor != 0) {
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Starts a while loop that performs as long as num modulus divisor isn't equal to 0
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We need to increment the divisor repeatedly as long as the divisor is not a factor of the number.
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while (num % divisor != 0) {
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Starts a while loop that performs as long as num modulus divisor isn't equal to 0
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Therefore, we need to use a loop structure.
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while (num % divisor != 0) {
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Starts a while loop that performs as long as num modulus divisor isn't equal to 0
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The condition in the while loop tests whether the body of the loop should be repeated, so it should test whether the divisor is not a factor of the number.
| 2 |
while (num % divisor != 0) {
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Starts a while loop that performs as long as num modulus divisor isn't equal to 0
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We could check whether the divisor is not a factor of the number by computing the remainder of the division of the number by the divisor.
| 3 |
String lastInitial = fullName.substring(5, 6);
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finds the last character in a substring in String fullName
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We need to extract the first letter from the last name.
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String lastInitial = fullName.substring(5, 6);
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finds the last character in a substring in String fullName
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We do this by calling the substring(5,6) method.
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divisor += 1;
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Adds 1 to the int divisor
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When the divisor is not a factor of the number, we increment the variable divisor by 1.
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String initials = firstInitial + lastInitial;
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Sets string initials to the characters found in 6,7
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This statements concatenates the extracted initials and store the result in the string initials.
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System.out.println(initials);
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outputs the string initials
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This statement prints the initials to the default standard output stream.
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System.out.println(initials);
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outputs the string initials
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The printed value is followed by the end-of-line character at the end.
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System.out.println("The smallest divisor of " + num + " is " + divisor);
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Prints the line that states what the smallest divisor of the original num integer is using num and divisor variables.
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This statement prints to the default standard output stream the smallest divisor of the number.
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int[] values = {5, 8, 4, 78, 95, 12, 1, 0, 6, 35, 46};
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assigns integer values to "values"
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We define array values to hold the specified numbers.
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int[] values = {5, 8, 4, 78, 95, 12, 1, 0, 6, 35, 46};
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assigns integer values to "values"
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We initialize the array by separating elements with a comma and enclosing the collection in braces { }.
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System.out.println(num + " squared = " + (num * num));
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Prints a line that states what the square of num is.
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The multiplication may also be performed directly in the println statement.
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System.out.println(num + " squared = " + (num * num));
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Prints a line that states what the square of num is.
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Note that we do not necessarily have to store the squared number in a variable.
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System.out.println(num + " squared = " + (num * num));
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Prints a line that states what the square of num is.
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To square each number in the sequence, we multiply it by itself using the multiplication (*) operator.
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System.out.println(num + " squared = " + (num * num));
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Prints a line that states what the square of num is.
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In each iteration of the loop, this statement prints the square number to the default standard output stream.
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System.out.println(num + " squared = " + (num * num));
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It will loop through this line multiple times and print out squares of every even positive integer less than or equal to 10.
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The multiplication may also be performed directly in the println statement.
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System.out.println(num + " squared = " + (num * num));
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It will loop through this line multiple times and print out squares of every even positive integer less than or equal to 10.
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Note that we do not necessarily have to store the squared number in a variable.
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System.out.println(num + " squared = " + (num * num));
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It will loop through this line multiple times and print out squares of every even positive integer less than or equal to 10.
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To square each number in the sequence, we multiply it by itself using the multiplication (*) operator.
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System.out.println(num + " squared = " + (num * num));
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It will loop through this line multiple times and print out squares of every even positive integer less than or equal to 10.
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In each iteration of the loop, this statement prints the square number to the default standard output stream.
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for (int num = 2; num <= 10; num += 2) {
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Starts a for loop that initializes an int num to 2.
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To do this, we need to use a loop structure.
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for (int num = 2; num <= 10; num += 2) {
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Starts a for loop that initializes an int num to 2.
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We need to repeat the same process for each of the even positive integers that are less than or equal to 10.
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for (int num = 2; num <= 10; num += 2) {
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Starts a for loop that initializes an int num to 2.
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To do this, we initialize variable num to 2, loop until reaching 10 (inclusive), and increment num by 2 after each iteration of the loop.
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for (int num = 2; num <= 10; num += 2) {
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Starts a for loop that initializes an int num to 2.
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We use for loops instead of a while loop because we need to repeat the loop a certain number of times, and for loops are best-suited in cases like this when we know ahead of time the number of times that we need to repeat the loop.
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for (int num = 2; num <= 10; num += 2) {
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Starts a for loop that initializes an int num to 2.
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Here, we want the for loop to start counting from 2 (2 is the first positive even number) with every even integer number up to (including) 10.
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for (int num = 2; num <= 10; num += 2) {
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This loop increases num by 2 at the end of every iteration and will continue to loop through as long as num is less than or equal to 10.
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To do this, we need to use a loop structure.
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for (int num = 2; num <= 10; num += 2) {
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This loop increases num by 2 at the end of every iteration and will continue to loop through as long as num is less than or equal to 10.
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We need to repeat the same process for each of the even positive integers that are less than or equal to 10.
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for (int num = 2; num <= 10; num += 2) {
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This loop increases num by 2 at the end of every iteration and will continue to loop through as long as num is less than or equal to 10.
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To do this, we initialize variable num to 2, loop until reaching 10 (inclusive), and increment num by 2 after each iteration of the loop.
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for (int num = 2; num <= 10; num += 2) {
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This loop increases num by 2 at the end of every iteration and will continue to loop through as long as num is less than or equal to 10.
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We use for loops instead of a while loop because we need to repeat the loop a certain number of times, and for loops are best-suited in cases like this when we know ahead of time the number of times that we need to repeat the loop.
| 2 |
for (int num = 2; num <= 10; num += 2) {
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This loop increases num by 2 at the end of every iteration and will continue to loop through as long as num is less than or equal to 10.
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Here, we want the for loop to start counting from 2 (2 is the first positive even number) with every even integer number up to (including) 10.
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int maxValue = values[0];
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sets integer 0 for "maxValue"
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We need variable maxValue to store the maximum value of the array.
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int maxValue = values[0];
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sets integer 0 for "maxValue"
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We initialize this variable by the first value in the array because we initially assume that the first value is the maximum.
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Point1 point = new Point1();
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Initializes point which is a member of the point 1 class.
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This statement creates a Point1 object using the new keyword and empty parentheses.
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Point1 point = new Point1();
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Initializes point which is a member of the point 1 class.
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The variable point holds a reference to a Point1 object.
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for (int i = 1; i < values.length; i++) {
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runs through the length of the "values" set from 1 until the length is met
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We use a for loop to iterate over the remaining array indexes and search for the maximum value.
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for (int i = 1; i < values.length; i++) {
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runs through the length of the "values" set from 1 until the length is met
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We need the array indexes to start at 1 with every integer number up to but not including the array length.
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point.setX(7);
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Sets the x int in the point variable to 7.
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This statement invokes the method setX of the point to set its x-coordinate to 7.
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point.translate(11, 6);
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Sets the y int in the point variable to 2.
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This statement invokes the method translate of the point.
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point.translate(11, 6);
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Sets the y int in the point variable to 2.
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The second parameter specifies how much we want to shift the y-coordinate of the point.
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point.translate(11, 6);
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Sets the y int in the point variable to 2.
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The translate method receives two parameters.
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point.translate(11, 6);
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Sets the y int in the point variable to 2.
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The first parameter specifies how much we want to shift the x-coordinate of the point.
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if (values[i] > maxValue) {
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conditional set up, asking if "values" at i is greater than the maxValue, initially 0
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We need to compare the value at the index i of the array with the maximum value stored in variable maxValue.
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if (values[i] > maxValue) {
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conditional set up, asking if "values" at i is greater than the maxValue, initially 0
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If the value at that index is larger than the maximum value, then we need to set the maximum value to the value of the element at index i.
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maxValue = values[i];
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if previous condition met, maxValue is set to value at i
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This statement sets the maximum value to value of the element at index i of the array.
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System.out.println("Maximum value: " + maxValue);
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print the max value after the recursion ends
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This statement prints the maximum value of the array to the default standard output stream.
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point.translate(11, 6);
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Increases the x and y integer, which are a part of the point variable, by 11 and 6 respectively.
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This statement invokes the method translate of the point.
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point.translate(11, 6);
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Increases the x and y integer, which are a part of the point variable, by 11 and 6 respectively.
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The second parameter specifies how much we want to shift the y-coordinate of the point.
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point.translate(11, 6);
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Increases the x and y integer, which are a part of the point variable, by 11 and 6 respectively.
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The translate method receives two parameters.
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point.translate(11, 6);
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Increases the x and y integer, which are a part of the point variable, by 11 and 6 respectively.
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The first parameter specifies how much we want to shift the x-coordinate of the point.
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point.translate(11, 6);
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Increases the x and y integer, which are a part of the point variable, by 11 and 6 respectively.
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This statement invokes the method translate of the point.
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point.translate(11, 6);
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Increases the x and y integer, which are a part of the point variable, by 11 and 6 respectively.
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The second parameter specifies how much we want to shift the y-coordinate of the point.
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point.translate(11, 6);
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Increases the x and y integer, which are a part of the point variable, by 11 and 6 respectively.
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The translate method receives two parameters.
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point.translate(11, 6);
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Increases the x and y integer, which are a part of the point variable, by 11 and 6 respectively.
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The first parameter specifies how much we want to shift the x-coordinate of the point.
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System.out.println("Maximum value: " + maxValue);
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print the max value after the recursion ends
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This statement prints the maximum value of the array to the default standard output stream.
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point.translate(11, 6);
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Increases the x and y integer, which are a part of the point variable, by 11 and 6 respectively.
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This statement invokes the method translate of the point.
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point.translate(11, 6);
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Increases the x and y integer, which are a part of the point variable, by 11 and 6 respectively.
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The second parameter specifies how much we want to shift the y-coordinate of the point.
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point.translate(11, 6);
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Increases the x and y integer, which are a part of the point variable, by 11 and 6 respectively.
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The translate method receives two parameters.
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point.translate(11, 6);
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Increases the x and y integer, which are a part of the point variable, by 11 and 6 respectively.
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The first parameter specifies how much we want to shift the x-coordinate of the point.
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System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
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Prints the coordinates (x and y ints) of the point variable.
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Note that we do not necessarily have to store the returned value from each of these methods in a variable.
| 1 |
System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
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Prints the coordinates (x and y ints) of the point variable.
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We could use the returned value of them directly in the println statement.
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System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
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Prints the coordinates (x and y ints) of the point variable.
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This statement prints the coordinates of the point to the default standard output stream.
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System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
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Prints the coordinates (x and y ints) of the point variable.
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The printed text is followed by the end-of-line character at the end.
| 1 |
System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
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Prints the coordinates (x and y ints) of the point variable.
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To get the point's coordinates, we invoke the method getX and getY of the point.
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class Point1 {
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Creates a class called Point1
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We define the class Point1 to represent a point in the Euclidean plane.
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private int y;
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Creates an int y which is part of the Point1 class.
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Therefore, we need to declare an instance variable for the class to store the y-coordinate of the point.
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private int y;
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Creates an int y which is part of the Point1 class.
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We declare it as integer because we want to have integer coordinates for the point.
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private int y;
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Creates an int y which is part of the Point1 class.
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Note that an instance variable is a variable defined in a class, for which each instantiated object of the class has a separate copy, or instance.
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private int y;
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Creates an int y which is part of the Point1 class.
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Every object of the Point1 class will have its own y-coordinate.
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public void translate(int dx, int dy) {
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Creates a function called translate which takes 2 ints called dx and dy
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This method shifts the coordinates by a specific delta-x and delta-y, which are passed as parameters.
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public void translate(int dx, int dy) {
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Creates a function called translate which takes 2 ints called dx and dy
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We define this method as public to provide access to this method from outside of the class.
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public void translate(int dx, int dy) {
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Creates a function called translate which takes 2 ints called dx and dy
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Also, we define its return type as void, as it does not return any value.
| 1 |
public void translate(int dx, int dy) {
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Creates a function called translate which takes 2 ints called dx and dy
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Note that both of the parameters are declared as integers because the point has integer coordinates.
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x += dx;
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Increases the x int in the Point1 class by dx
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To shift the x-coordinate of the point, we need to add dx to the value of the x-coordinate of the point.
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public void setX(int newX) {
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Creates a function that sets the x int in the Point1 class
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Also, we define its return type as void, as it does not return any value.
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public void setX(int newX) {
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Creates a function that sets the x int in the Point1 class
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We define this method as public to provide access to this method from outside of the class.
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public void setX(int newX) {
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Creates a function that sets the x int in the Point1 class
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This method sets the current value of the x-coordinate of the point to the given value (newX) that is specified as the method's parameter.
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public void setX(int newX) {
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Creates a function that sets the x int in the Point1 class
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Note that the instance variable x is private; thus, it cannot be directly changed from outside the class.
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public void setX(int newX) {
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Creates a function that sets the x int in the Point1 class
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The parameter of the method is declared as integer because the x-coordinate of the point is an integer.
| 1 |
public void setX(int newX) {
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Creates a function that sets the x int in the Point1 class
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It can be changed from outside the class only through this method.
| 1 |
public void setX(int newX) {
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Creates a function that sets the x int in the Point1 class.
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Also, we define its return type as void, as it does not return any value.
| 1 |
public void setX(int newX) {
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Creates a function that sets the x int in the Point1 class.
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We define this method as public to provide access to this method from outside of the class.
| 1 |
public void setX(int newX) {
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Creates a function that sets the x int in the Point1 class.
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This method sets the current value of the x-coordinate of the point to the given value (newX) that is specified as the method's parameter.
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public void setX(int newX) {
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Creates a function that sets the x int in the Point1 class.
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Note that the instance variable x is private; thus, it cannot be directly changed from outside the class.
| 1 |
public void setX(int newX) {
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Creates a function that sets the x int in the Point1 class.
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The parameter of the method is declared as integer because the x-coordinate of the point is an integer.
| 2 |
public void setX(int newX) {
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Creates a function that sets the x int in the Point1 class.
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It can be changed from outside the class only through this method.
| 1 |
public void setX(int newX) {
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This function takes an int called newX.
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Also, we define its return type as void, as it does not return any value.
| 1 |
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