Rhythmk 一步一步学 JAVA (20) JAVA enum常用方法
时间:2022-03-21 06:15
JAVA 枚举定义常用方法:
1、static Enum valueOf(Class enum,String name)
返回指定name的枚举类型
2、Static Enum values[]
返回枚举常量集合
?
package
com.rhythmk.filedemo;
import java.util.Scanner;
public class enum_demo {
public
static void main(String[] args) {
System.out.println( "------------------------1-----------------------------" );
//1、获取枚举对象所有枚举类型
Size[] sizeArr=Size.values();
for
(Size size : sizeArr) {
System.out.println(size.toString());
}
System.out.println( "------------------------2-----------------------------" );
// 2、通过 Enum 的 Indexof(EnumType,name) 返回于name同名的枚举属性
Scanner sc= new
Scanner(System.in);
System.out.println( "请输入Size属性[SMALL,BIG,LARGE]" );
String sInput=sc.next();
Size smallSize=Size.SMALL;
Size eInput=Size.valueOf(Size. class ,sInput);
if (eInput==smallSize)
{
System.out.println( "True,‘枚举对象为:‘" +eInput);
} else
{
System.out.println( "False" );
}
System.out.println( "------------------------3-----------------------------" );
// 3、调用枚举定义方法
String sizeShow=Size.SMALL.Show();
System.out.println(sizeShow);
Size bigLarge= Size.BIGLARGE;
System.out.println( "------------------------4-----------------------------" );
// 4、调用枚举自定义方法
String sblogsShow=Blog.RHYTHMK.Show();
System.out.println(sblogsShow);
}
}
enum Size
{
SMALL,
BIG,
LARGE,
BIGLARGE( "BIGLARGE" );
private
Size()
{}
private
Size(String str)
{
System.out.println( "Size被创建,传入值为:" +str);
}
public
String Show()
{
return
"调用枚举定义方法回传值" ;
}
}
enum Blog
{
CNBLOGS( "博客园" ),
CSDN( "CSDN博客" ),
RHYTHMK( "本博客" );
private
Blog(String str)
{
this ._show=str;
}
private
String _show;
private
String getShow()
{
return
_show;
}
public
String Show()
{
return
"当前选择博客为:" +getShow();
}
} |
输出:
------------------------1-----------------------------
Size被创建,传入值为:BIGLARGE
SMALL
BIG
LARGE
BIGLARGE
------------------------2-----------------------------
请输入Size属性[SMALL,BIG,LARGE]
SMALL
True,‘枚举对象为:‘SMALL
------------------------3-----------------------------
调用枚举定义方法回传值
------------------------4-----------------------------
当前选择博客为:本博客
Rhythmk 一步一步学 JAVA (20) JAVA enum常用方法,gxlsystem