Java Switch是否支持字符串比较

是的，从Java 7开始，switch语句支持字符串比较。在这之前，switch语句只支持整数、字符、枚举类型和字节、短整型、整型和长整型。使用字符串作为switch表达式的值时，需要确保字符串不为null，否则会抛出NullPointerException。

以下是一个简单的示例：

public class SwitchStringExample {
    public static void main(String[] args) {
        String day = "Monday";

        switch (day) {
            case "Monday":
                System.out.println("It's Monday, the start of the workweek.");
                break;
            case "Tuesday":
                System.out.println("It's Tuesday, second day of the week.");
                break;
            case "Wednesday":
                System.out.println("It's Wednesday, middle of the week.");
                break;
            case "Thursday":
                System.out.println("It's Thursday, almost weekend.");
                break;
            case "Friday":
                System.out.println("It's Friday, the end of the workweek.");
                break;
            case "Saturday":
                System.out.println("It's Saturday, enjoy your weekend!");
                break;
            case "Sunday":
                System.out.println("It's Sunday, relax and prepare for the next week.");
                break;
            default:
                System.out.println("Invalid day");
        }
    }
}

在这个例子中，我们使用字符串变量day作为switch表达式的值，并根据其值执行相应的代码块。