1. Java枚举示例
! l% K U! V+ ~' X% M) D. epackage com.mkyong.java
public enum Language {
JAVA,
PYTHON,
NODE,
NET,
RUBY
}
+ ~6 t: s1 `& M2.与==比较
; B. w$ E3 @! r/ g, x 将枚举值与==运算符进行比较的示例。package com.mkyong.java
public class Test {
public static void main(String[] args) {
// Covert string to enum
//Language enumObj = Language.valueOf("java".toUpperCase());
Language enumObj = Language.JAVA;
if (enumObj == Language.JAVA) {
System.out.println("Welcome Java");
} else if (enumObj == Language.NET) {
System.out.println("Welcome .Net");
} else if (enumObj == Language.NODE) {
System.out.println("Welcome Node JS");
} else if (enumObj == Language.PYTHON) {
System.out.println("Welcome Python");
} else if (enumObj == Language.RUBY) {
System.out.println("Welcome Ruby");
} else {
System.out.println("Hello World");
}
}
} 3 i# T/ q# J3 n# o5 T
输出量:Welcome Java
1 A: _) v9 I* ~3.与开关比较2 V3 C @: \ J0 n
另外,您可以将枚举值与switch语句进行比较。2 E0 r# ?1 `. V2 {) I
package com.mkyong.java
public class Test {
public static void main(String[] args) {
Language enumObj = Language.PYTHON;
switch (enumObj) {
case JAVA:
System.out.println("Welcome Java");
break;
case NET:
System.out.println("Welcome .Net");
break;
case NODE:
System.out.println("Welcome Node JS");
break;
case PYTHON:
System.out.println("Welcome Python");
break;
case RUBY:
System.out.println("Welcome Ruby");
break;
default:
System.out.println("Hello World");
break;
}
}
}
3 l! h; S) }" o, ]7 L 输出量:Welcome Python$ w0 A2 _* }) n" t9 d4 A
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