枚举

 

package com.zzu.eum;

public enum Grades {
    A("中国") {
        public String getLocalValue() {
            return "中国雄起";
        }
    },
    B("美国") {
        public String getLocalValue() {
            return "美国完蛋";
        }
    },
    C("日本") {
        public String getLocalValue() {
            return "我爱日本女优";
        }
    };
    private String value = "";

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

    public String getValue() {
        return value;
    }
public abstract String getLocalValue();
}

 

package com.zzu.eum;

public class TestEnum {

public static void main(String[] args) {

    /**
     * 遍历enum的所有标题
     */
for (Grades grades:Grades.values()) {
    System.out.println(grades);
}
//获取单一标题
System.out.println(Grades.valueOf(Grades.class,"A"));
//获取单一标题
Grades grades1=Grades.A;
//grades打出的内容是A
//输出单一内容的值
System.out.println(grades1.getValue());
}
}