Switch语句中的字符串 _Switch语句中的字符串

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Switch语句示例1中的字符串
Switch语句示例2中的字符串

在Java 7中, Java允许你在switch语句的表达式中使用字符串对象。为了使用字符串, 你需要考虑以下几点：
它只能是字符串对象。

Object game = "Hockey"; // It is not allowed String game = "Hockey"; // It is OK.

字符串对象区分大小写。

"Hickey" and "hocker" are not equal.

没有空对象
传递字符串对象时要小心, 将null对象的原因传递给NullPointerException。
Switch语句示例1中的字符串

public class StringInSwitchStatementExample { public static void main(String[] args) { String game = "Cricket"; switch(game){ case "Hockey": System.out.println("Let's play Hockey"); break; case "Cricket": System.out.println("Let's play Cricket"); break; case "Football": System.out.println("Let's play Football"); } } }

输出：

Let's play Cricket

Switch语句示例2中的字符串

public class StringInSwitchStatementExample { public static void main(String[] args) { String game = "Card-Games"; switch(game){ case "Hockey": case"Cricket": case"Football": System.out.println("This is a outdoor game"); break; case "Chess": case"Card-Games": case"Puzzles": case"Indoor basketball": System.out.println("This is a indoor game"); break; default: System.out.println("What game it is?"); } } }

【Switch语句中的字符串】输出：