updated find elements in list using java 8 lambda expression
updated find first non null in list using java 8 lambda expression
updated frequency of object in collection using with java 8 lambda expression
updated get first element in list with java 8 stream operation
updated list contains all with java 8 lambda expression
updated list contains any example with lambda expression
updated list contains any example with aggregate operation: reduction
remove lambda suffix
updated min value from list example with aggregate operation: reduction
organize imports
updated print a list with java 8 syntax