1. Java枚举示例
( n4 }) O4 Z- o% z) z) h+ i; q* tpackage com.mkyong.java
public enum Language {
JAVA,
PYTHON,
NODE,
NET,
RUBY
}
7 z& a. V4 t( \! Y& d: U2.与==比较4 Y7 t( F4 l: n* O" }* ?/ h- B; R
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 \! I9 u1 L' M+ V$ d# p$ y 输出量:Welcome Java- t" \0 s& w3 p# C% D0 {2 O
3.与开关比较3 x w) U" d' R. {
另外,您可以将枚举值与switch语句进行比较。
/ z& ?& u3 F. a' \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;
}
}
} . U7 G. }+ y) R5 r. G
输出量:Welcome Python
5 a: `/ [+ |- u6 N |