Java8 Lambda Use cases

Runnable - Instad useing

public class RunnableTest {
  public static void main(String[] args) {
    System.out.println("=== RunnableTest ===");
 
    Runnable r = new Runnable(){
 
      @Override
      public void run(){
        System.out.println("Hello world one!");
      }
    };
 
    r.run();   
  }
}

User

public class RunnableTest {
  public static void main(String[] args) {
 
    System.out.println("=== RunnableTest ===");
 
    Runnable r = () -> System.out.println("Hello world two!");
 
    r.run();
 
  }
}