1. Java枚举示例
: F) D- W [8 R& l5 N$ T) r( dpackage com.mkyong.java
public enum Language {
JAVA,
PYTHON,
NODE,
NET,
RUBY
} ' t; M3 c+ w( h8 c5 x! j1 o& ~
2.与==比较( a- x$ o, L3 I9 L
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");
}
}
} . s; T- {# b+ @0 f. [. f: \( c
输出量:Welcome Java5 B6 ?2 a# h6 ]) c( l5 ?& i. I, o
3.与开关比较. ? j. c" ~+ s5 w
另外,您可以将枚举值与switch语句进行比较。
) b- Q1 m3 v5 n8 Z2 u5 E1 g4 a3 B5 Apackage 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;
}
}
}
2 k" r! n8 ?2 c: y; t+ _ 输出量:Welcome Python* M+ P" D( O3 P @% h
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