java中switch用法

以下是Java中switch用法的两个例子：
1. 使用整型变量作为switch的表达式[^1]：

int day = 3;
String dayName;
switch (day) {
    case 1:
        dayName = "Monday";
        break;
    case 2:
        dayName = "Tuesday";
        break;
    case 3:
        dayName = "Wednesday";
        break;
    case 4:
        dayName = "Thursday";
        break;
    case 5:
        dayName = "Friday";
        break;
    case 6:
        dayName = "Saturday";
        break;
    case 7:
        dayName = "Sunday";
        break;
    default:
        dayName = "Invalid day";
        break;
}
System.out.println("Day: " + dayName); // 输出：Wednesday

2. 使用字符串变量作为switch的表达式[^2]：

String seasonName = "summer";
String seasonType;
switch (seasonName) {
    case "spring":
        seasonType = "Warm";
        break;
    case "summer":
        seasonType = "Hot";
        break;
    case "autumn":
        seasonType = "Cool";
        break;
    case "winter":
        seasonType = "Cold";
        break;
    default:
        seasonType = "Invalid season";
        break;
}
System.out.println("Season type: " + seasonType); // 输出：Hot