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EnumTest.java
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package Chapter5;
import java.lang.Enum;
import java.util.Scanner;
public class EnumTest {
public enum Size{SMALL,MEDIUM,LARGE};
//Size类型的变量只能存储这个类型声明时其中的某一个枚举值，或者null
//比较时只需要用“==”，永远不需要用equals
Size s=Size.LARGE;
public static void main(String[] args) {
//1.返回枚举类型常量
Size.LARGE.toString();
//2.将ss设置成Size.small
Size ss=Enum.valueOf(Size.class, "SMALL");
//3.返回包含全部枚举值的数组
Size[] values=Size.values();
Scanner in=new Scanner(System.in);
System.out.println("please input a Size：(SMALL,MEDIUM,LARGE)：");
String input=in.next().toUpperCase();
Size2 s2=Enum.valueOf(Size2.class,input);
System.out.println("size:"+s2);
System.out.println("您输入的是："+s2.getAbb());
if(s2==Size2.LARGE){
System.out.println("您输入的是LARGESize");
}
}
enum Size2{
SMALL("S"),MEDIUM("M"),LARGE("L");
private String abb;
private Size2(String abb){this.abb=abb;}
public String getAbb(){return abb;}
}
}