/**
* 测试switch语句的用法
*/
public class TestSwitch01 {
public static void main(String[] args) {
int grade = (int)(4*Math.random() 1);
switch (grade){
//switch()括号内的值默认int型,char和String字符串也可以使用
case 1:
//如果grade为1 执行下面语句
System.out.println("大一");
break;
//遇到break结束switch语句
case 2:
System.out.println("大二");
break;
case 3:
System.out.println("大三");
break;
default:
System.out.println("大四");
}
//和if同理 switch在多值判断的时候比if清晰
if (grade==1){
System.out.println("1");
} else if (grade==2) {
System.out.println("2");
} else if (grade==3) {
System.out.println("3");
}else {
System.out.println("4");
}
int month = (int)(12*Math.random() 1);
switch (month){
case 1:
case 2:
case 3:
//1和2不写break会沿用3的语句，相当于if month<=3
System.out.println("第一季度");
break;
case 4:
case 5:
case 6:
System.out.println("第二季度");
break;
case 7:
case 8 :
case 9:
System.out.println("第三季度");
break;
default:
System.out.println("第四季度");
}
char d1 = 'a';
switch (d1){
case 'a':
System.out.println('a');
break;
default:
System.out.println('b');
}
String d2 = "起飞";
switch (d2){
case "起飞":
System.out.println("起飞");
break;
default:
System.out.println("芜湖");
}
}
}
