Java中的switch新特性与使用详解

public void switchInt(int a){
    switch (a){
        case 0:
            System.err.println("0");
            break;
        case 10:
            System.err.println("10");
            break;
        default:
            break;
    }
}

public void switchString(String s){
    switch (s){
        case "hello":
            System.out.println("hello");
            break;
        default:
            break;
    };
}

public void switchEnum(Day day){
    switch (day){
        case Monday:
            System.out.println("monday");
            break;
        default:
            break;
    }
}
enum Day{
    Monday,
    Tuesday;
}

int  a = 12;
char result=
    switch(digitInDecimal){
        case  0 -> '0';
        case  1 -> '1';
        case  2 -> '2';
        case  3 -> '3';
        default -> '?';
  };

int  a = 12;
char result=
    switch(digitInDecimal){
        case  0, 1, 2 -> '0';
        default -> '?';
  };

int  a = 12;
char result=
    switch(digitInDecimal){
        case  0, 1, 2 : yield '0';
        default : yield '?';
  };