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学新东西最快的方式就是例子，关于lambda表达式的几个简单例子，记录一下。

//旧方法new Thread(new Runnable() {
   	@Override	public void run() {
      	 	System.out.println("Hello from thread");	}}).start();//新方法:new Thread(	() -> System.out.println("Hello from thread")).start();//旧方法:button.addActionListener(new ActionListener() {
   	@Override	public void actionPerformed(ActionEvent e) {
       	System.out.println("The button was clicked using old fashion code!");	}});//新方法:button.addActionListener( (e) -> {
       System.out.println("The button was clicked. From Lambda expressions !");});//Old way:List
   
     list = Arrays.asList(1, 2, 3, 4, 5, 6, 7);for(Integer n: list) {
    		System.out.println(n);}//New way:List
    
      list = Arrays.asList(1, 2, 3, 4, 5, 6, 7);list.forEach(n -> System.out.println(n));//也可以用 :: 方法引用list.forEach(System.out::println);
    
   

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