import java.util.Arrays;

import java.util.List;

import java.util.function.Predicate;

/**

* Created by john on 2016/1/7.

*/

public class Java8FunctionInterfaceExample {

public static void main(String[] args) {

List<Integer> list = Arrays.asList(1,2,3,4,5,6,7,8,9);

//Predicate<Integer> predicate = n -> true

// n is passed as parameter to test method of Predicate interface

// test method will always return true what value n has

System.out.println("Print all number");

eval(list,n->true);

// Predicate<Integer> predicate1 = n -> n%2 == 0

// n is passed as parameter to test method of Predicate interface

// test method will return true if n%2 comes to be zero

System.out.println("Print even numbers:");

eval(list, n-> n%2 == 0 );

// Predicate<Integer> predicate2 = n -> n > 3

// n is passed as parameter to test method of Predicate interface

// test method will return true if n is greater than 3.

System.out.println("Print numbers greater than 3:");

eval(list, n-> n > 3 );

}

public static void eval(List<Integer> list, Predicate<Integer> predicate) {

for(Integer n : list) {

if(predicate.test(n)) {

System.out.print(n + " ");

}

}

System.out.println();

}

}