java switch case语句例子

int month = 8;
switch (month) {
    case 1:
        System.out.println("January");
        break;
    case 2:
        System.out.println("February");
        break;
    case 3:
        System.out.println("March");
        break;
    case 4:
        System.out.println("April");
        break;
    case 5:
        System.out.println("May");
        break;
    case 6:
        System.out.println("June");
        break;
    case 7:
        System.out.println("July");
        break;
    case 8:
        System.out.println("August");
        break;
    case 9:
        System.out.println("September");
        break;
    case 10:
        System.out.println("October");
        break;
    case 11:
        System.out.println("November");
        break;
    case 12:
        System.out.println("December");
        break;
    default:
        System.out.println("Invalid month");
        break;
}

上面的程序中，switch语句会检查变量month是否等于1，2，3等等。如果等于1，就会执行第一个case语句。如果等于2，就会执行第二个case语句。如果都不符合，就会执行default语句。