在每种情况下都使用具有一系列值的 switch 语句?

2022-01-19 00:00:00 if-statement switch-statement java

在 Java 中，是否可以编写一个 switch 语句，其中每个 case 包含多个值?例如(虽然显然下面的代码不起作用):

In Java, is it possible to write a switch statement where each case contains more than one value? For example (though clearly the following code won't work):

switch (num) {
    case 1 .. 5:
        System.out.println("testing case 1 to 5");
        break;
    case 6 .. 10:
        System.out.println("testing case 6 to 10");
        break;
}

我认为这可以在 Objective C 中完成，在 Java 中是否有类似的事情?还是我应该只使用 if, else if 语句来代替?

I think this can be done in Objective C, are there a similar thing in Java? Or should I just use if, else if statements instead?

推荐答案

Java 没有这种东西.为什么不直接执行以下操作?

Java has nothing of that sort. Why not just do the following?

public static boolean isBetween(int x, int lower, int upper) {
  return lower <= x && x <= upper;
}

if (isBetween(num, 1, 5)) {
  System.out.println("testing case 1 to 5");
} else if (isBetween(num, 6, 10)) {
  System.out.println("testing case 6 to 10");
}

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