1. Java枚举示例
3 f1 ?5 o3 S4 @* \# b L* ?package com.mkyong.java
public enum Language {
JAVA,
PYTHON,
NODE,
NET,
RUBY
} 6 n6 N3 G2 x+ x8 j- c h+ G X S
2.与==比较
$ o, q. ?5 N2 H8 P 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");
}
}
}
9 A! p6 A* l. G 输出量:Welcome Java/ R6 J l3 w. K% B: K) }% `
3.与开关比较( f, D$ k# C- n7 i2 G0 F( M
另外,您可以将枚举值与switch语句进行比较。* d1 p9 L, c- p; 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;
}
}
} : {# d- [, L$ U/ V5 U9 m# T$ t$ T
输出量:Welcome Python
" }; ?/ f" @# } |