1 switch case语句

switch(表达式) {
	case 常量值1:
	语句体1;
	break;
	case 常量值2:
	语句体2;
	break;
	...
	case 常量值n:
	语句体n;
	default:
	语句体n+1;
}

2 switch case语句中表达式类型

public class SwitchCase {
    public static void main(String[] args) {
        String flag = "A";//  byte short char int enum
        switch (flag){
            case "A":
                System.out.println("A");
                break;
            case "B":
                System.out.println("B");
                break;
            default:
                System.out.println("Other");
        }
    }
}

public class SwitchCase {
    public static void main(String[] args) {
        int flag = 0;//  byte short char int enum
        switch (flag) {
            case 0:
                System.out.println(0);
                break;
            case 1:
                System.out.println(1);
                break;
            default:
                System.out.println("Other");
        }
    }
}