java8 lambda

runnable 为函数式接口。
所以支持下列写法。

public class LambdaExpression {
	public static void process(Runnable r){ 
		 r.run(); 
		} 
	public static void main(String[] args) {
		Runnable r1 = () -> System.out.println("Hello World 1");
		Runnable r2 = new Runnable(){ 
		 public void run(){ 
		 System.out.println("Hello World 2"); 
		 } 
		}; 

		process(r1); 
		process(r2); 
		process(() -> System.out.println("Hello World 3"));
	}
	
}