java的枚举

package com.wzh.test.enum0;

import org.junit.Test;

public class demo1 {

@Test
public void testAb(){
System.out.println(Ab.a.getValue());
}

//如果定义枚举的构造函数，方法和字段，去封装更多的信息
enum Ab{
a("100-90"),
b("89-80"),
c("79-70");

private String value;
private Ab(String value){
this.value=value;
}

public String getValue() {
return this.value;
}
}
}

package com.wzh.test.enum1;

import org.junit.Test;

public class demo1 {

@Test
public void test2(){
System.out.println(Ab.c.name());
System.out.println(Ab.a.ordinal());

String str="b";
Ab a=Ab.valueOf(str);
System.out.println(a);

Ab arr[]= Ab.values();
for(Ab ab : arr){
System.out.println(ab);
}
}

@Test
public void testAb() {
System.out.println(Ab.b.localValue());

System.out.println(Ab.values());
}

// 带抽象方法的枚举
enum Ab {
a("100-90") {
public String localValue() {
return "优";
}
},
b("89-80") {
public String localValue() {
return "良";
}
},
c("79-70") {
public String localValue() {
return "及格";
}
};

private String value;

private Ab(String value) {
this.value = value;
}

public String getValue() {
return this.value;
}

public abstract String localValue();

}
}