java switch

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