Code Line
stringclasses 57
values | User Explanation
stringclasses 692
values | Line-Explanation in PCEX
stringclasses 131
values | Annotation Score
float64 1
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public void setX(int newX) {
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This function takes an int called newX.
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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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This function takes an int called newX.
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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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This function takes an int called newX.
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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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This function takes an int called newX.
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The parameter of the method is declared as integer because the x-coordinate of the point is an integer.
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public void setX(int newX) {
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This function takes an int called newX.
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It can be changed from outside the class only through this method.
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public int getX() {
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Creates a function called getX that returns the int x 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 int getX() {
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Creates a function called getX that returns the int x in the Point1 class.
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This method returns the x-coordinate of the point.
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public int getX() {
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Creates a function called getX that returns the int x in the Point1 class.
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Note that the instance variable x is private; thus, it cannot be directly accessed from outside the class.
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public int getX() {
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Creates a function called getX that returns the int x in the Point1 class.
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Also, we define its return type as int, as it returns the x-coordinate of the point which is an integer.
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public int getX() {
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Creates a function called getX that returns the int x in the Point1 class.
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It can be accessed from outside the class only through this getter method.
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public void setX(int newX) {
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Creates a function called setX, 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 called setX, 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 called setX, 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 called setX, 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 called setX, 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.
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public void setX(int newX) {
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Creates a function called setX, 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.
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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 |
public void setX(int newX) {
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This function takes an int called newX.
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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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This function takes an int called newX.
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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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This function takes an int called newX.
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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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This function takes an int called newX.
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The parameter of the method is declared as integer because the x-coordinate of the point is an integer.
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public void setX(int newX) {
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This function takes an int called newX.
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It can be changed from outside the class only through this method.
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Scanner scan = new Scanner(System.in);
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Allows the user to send input to the machine.
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To read the input value from the user, we need to define a Scanner object.
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Scanner scan = new Scanner(System.in);
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Allows the user to send input to the machine.
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We need to read and process the integer that the user enters.
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System.out.println("Enter an integer: ");
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Prints the line that says "Enter the integer: " on the machine.
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We prompt the user to enter an integer.
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int num = scan.nextInt();
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Takes the next input from the user and initializes the int num to the input.
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We read the input integer by calling the nextInt() method because this input is an integer.
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int num = scan.nextInt();
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Takes the next input from the user and initializes the int num to the input.
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We need to read the integer that the user enters and store it in a variable.
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scan.close();
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Ends the ability of the user to send input to the machine.
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We close the scanner as we do not want to process any input from the user in the rest of the program.
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if ( num > 0 ) {
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if the int num is greater than 0 enter the if statement.
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If the integer is neither positive nor negative, then we could conclude that the integer is zero.
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if ( num > 0 ) {
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if the int num is greater than 0 enter the if statement.
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The conditions that tests for the integer's sign are mutually exclusive (i.e., one and only one of the conditions can be true); therefore, their order does not matter.
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if ( num > 0 ) {
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if the int num is greater than 0 enter the if statement.
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To determine the sign of the integer, we need to perform two tests: one for determining whether the integer is positive and one for determining whether the integer is negative.
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if ( num > 0 ) {
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if the int num is greater than 0 enter the if statement.
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Also, it is better to use if-else if statements instead of sequential if statements because an integer has only one sign and once we find the sign, we don't need to perform more tests.
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if ( num > 0 ) {
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if the int num is greater than 0 enter the if statement.
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If both of these tests fail, then we could conclude that the integer is zero.
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System.out.println("The integer is positivie.");
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Prints the line "The integer is positive." due to the if statement condition
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This statement prints that the integer is positive.
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System.out.println("The integer is positivie.");
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Prints the line "The integer is positive." due to the if statement condition
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The printed text is followed by the end-of-line character at the end.
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} else if ( num < 0 ) {
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If the int num is less than 0 enter the else if statement.
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If the first test fails (i.e., when the integer is not positive), we need to test if the integer is negative.
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System.out.println("The integer is negative.");
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Prints the line "The integer is negative." due to the conditional else if statement.
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The printed text is followed by the end-of-line character at the end.
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System.out.println("The integer is negative.");
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Prints the line "The integer is negative." due to the conditional else if statement.
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This statement prints that the integer is negative.
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System.out.println("The integer is zero.");
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Print the line "The integer is zero." because the previous if and else if statements were false.
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The printed text is followed by the end-of-line character at the end.
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System.out.println("The integer is zero.");
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Print the line "The integer is zero." because the previous if and else if statements were false.
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This statement prints that the integer is zero.
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} else {
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If the previous if and else if statements are false, enters the else statement.
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We need to end the above if-else if statements with an else statement that its body is executed when none of the above tests are true, that is when the integer is zero.
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int [] arr = { 1, 2, 3};
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Creates an array arr that has 3 ints: 1, 2, and 3.
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We initialize the array of type int to hold the specified numbers.
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int [] arr = { 1, 2, 3};
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Creates an array arr that has 3 ints: 1, 2, and 3.
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We initialize the array by separating elements with a comma and enclosing the collection in braces { }.
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for ( int i = 0; i < arr.length; i++ ) {
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Creates a for loop that will loop through each element of the arr array.
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We want to iterate over the array and increment each element in the array by 1.
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for ( int i = 0; i < arr.length; i++ ) {
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Creates a for loop that will loop through each element of the arr array.
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To really change the array as we march across it, we need to use indexes so we can assign an updated value to each position as we go.
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for ( int i = 0; i < arr.length; i++ ) {
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Creates a for loop that will loop through each element of the arr array.
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We need the array indexes to start at 0 (array indexes start from 0) with every integer number up to but not including the array length.
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arr[i] += 1;
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Increases the int in the arr array at the index i by 1.
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This statement increments the element at the index i of the array by 1.
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arr[i] += 1;
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This will be done for each loop and will satisfy the goal description.
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This statement increments the element at the index i of the array by 1.
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for (int num = 2; num <= 10; num += 2) {
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runs from 2 to 10, adding to to num each iteration
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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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runs from 2 to 10, adding to to num each iteration
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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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runs from 2 to 10, adding to to num each iteration
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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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runs from 2 to 10, adding to to num each iteration
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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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runs from 2 to 10, adding to to num each iteration
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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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System.out.println(num + " squared = " + (num * num));
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provides output of each num added to "squared" added to num times num
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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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provides output of each num added to "squared" added to num times num
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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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provides output of each num added to "squared" added to num times num
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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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provides output of each num added to "squared" added to num times num
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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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Point1 point = new Point1();
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creates a new set of Point with pointer name "point"
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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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creates a new set of Point with pointer name "point"
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The variable point holds a reference to a Point1 object.
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point.setX(7);
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sets the X value of point 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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moves the X,Y points to (11,6)
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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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moves the X,Y points to (11,6)
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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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moves the X,Y points to (11,6)
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The translate method receives two parameters.
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point.translate(11, 6);
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moves the X,Y points to (11,6)
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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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moves the X,Y points by adding (11,6)
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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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moves the X,Y points by adding (11,6)
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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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moves the X,Y points by adding (11,6)
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The translate method receives two parameters.
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point.translate(11, 6);
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moves the X,Y points by adding (11,6)
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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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Outputs the new X,Y coordinates
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Note that we do not necessarily have to store the returned value from each of these methods in a variable.
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System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
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Outputs the new X,Y coordinates
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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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Outputs the new X,Y coordinates
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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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Outputs the new X,Y coordinates
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The printed text is followed by the end-of-line character at the end.
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System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
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Outputs the new X,Y coordinates
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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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begins to define the class 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 a private integer, y
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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 a private integer, y
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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 a private integer, y
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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 a private integer, y
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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 "translate" with dependent integers 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 "translate" with dependent integers 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 "translate" with dependent integers dx and dy
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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 translate(int dx, int dy) {
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creates "translate" with dependent integers 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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adds x dx and defines new dx as this sum
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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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assigns new setX with dependent variable newX
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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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assigns new setX with dependent variable newX
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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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assigns new setX with dependent variable newX
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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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assigns new setX with dependent variable newX
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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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assigns new setX with dependent variable newX
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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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assigns new setX with dependent variable newX
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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 new setX with dependent variable newX
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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 new setX with dependent variable newX
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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 new setX with dependent variable newX
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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.
| 2 |
public void setX(int newX) {
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creates a new setX with dependent variable newX
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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 new setX with dependent variable newX
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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 new setX with dependent variable newX
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It can be changed from outside the class only through this method.
| 1 |
public int getX() {
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creates a public integer getX, with dependent variable x
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We define this method as public to provide access to this method from outside of the class.
| 1 |
public int getX() {
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creates a public integer getX, with dependent variable x
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This method returns the x-coordinate of the point.
| 1 |
public int getX() {
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creates a public integer getX, with dependent variable x
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Note that the instance variable x is private; thus, it cannot be directly accessed from outside the class.
| 1 |
public int getX() {
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creates a public integer getX, with dependent variable x
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Also, we define its return type as int, as it returns the x-coordinate of the point which is an integer.
| 1 |
public int getX() {
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creates a public integer getX, with dependent variable x
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It can be accessed from outside the class only through this getter method.
| 1 |
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