package java_test;class aaa{	String name;	public aaa(String name){		this.name=name;	}	public void test(){		int a=3;		switch (a){		case 1:			System.out.println("a为1");			break;		case 2:			System.out.println("a为2");			break;		case 3:			System.out.println("a为3");			break;		default:			System.out.println("haha");			break;		}	}}public class Hero {	public static void main(String[] args) {		aaa a=new aaa("hh");		System.out.println(a.name);	}}

　1.哪条case满足了，就从哪条case开始执行，一直执行到break或者执行到switch结束

   2.答案的书写没有顺序

   3.switch支持数据类型为：byte、short、char、int、String、枚举