1. Java枚举示例
" g/ j( I: P0 b+ D3 k! T r9 M, ]+ fpackage com.mkyong.java
public enum Language {
JAVA,
PYTHON,
NODE,
NET,
RUBY
}
2 u5 F/ p' Y1 E( h5 E1 J2.与==比较$ `' I9 ]9 S3 j' p+ g6 O2 T
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");
}
}
}
; e9 A/ ]6 {& V 输出量:Welcome Java' v/ D3 a3 W- F( O
3.与开关比较3 C4 U8 v, C3 l- ~, d& J" d. s
另外,您可以将枚举值与switch语句进行比较。/ i) B6 y7 W3 D
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;
}
}
}
% Z0 Z6 ~6 K+ P: e; Q3 g 输出量:Welcome Python
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