Java8

   1 /*
   2 javac LambdaExpressionTest.java 
   3 java -cp . LambdaExpressionTest
   4 */
   5 public class LambdaExpressionTest{
   6     public static void main(String[] args){
   7         System.out.println("LambdaExpressionTest");
   8         // define implementation
   9         // (lambda parameters) -> { // lambda body };
  10         TestIt testIt = (stuffx) -> System.out.println("Stuff " + stuffx);
  11         testIt.sayStuff("Msg");
  12         
  13         // change lambda function implementation
  14         testIt = (stuffxx) -> {
  15             stuffxx = stuffxx.toUpperCase();
  16             System.out.println("OtherStuff " + stuffxx);            
  17         };
  18         testIt.sayStuff("Msg");
  19     }
  20     
  21     // lambda expressions require interfaces to define the expected parameters
  22     public interface TestIt{
  23         void sayStuff(String stuff);
  24     }
  25 }