Java switch 关键字
示例
使用 switch 语句计算星期几名称
int day = 4;
switch (day) {
case 1:
System.out.println("Monday");
break;
case 2:
System.out.println("Tuesday");
break;
case 3:
System.out.println("Wednesday");
break;
case 4:
System.out.println("Thursday");
break;
case 5:
System.out.println("Friday");
break;
case 6:
System.out.println("Saturday");
break;
case 7:
System.out.println("Sunday");
break;
}
// Outputs "Thursday" (day 4)
定义和用法
The switch keyword selects one of many code blocks to be executed.
从上面的例子来看，它的工作原理如下
- The
switchexpression is evaluated once. - The value of the expression is compared with the values of each
case. - If there is a match, the associated block of code is executed.
- The
breakkeyword is used to break out of the switch block when a match is found
相关页面
在我们的 Java Switch 教程 中了解更多关于 switch 语句的信息。
