java枚举应用

枚举实现常量映射，应用场景：字典

public enum EnumDemo {
STOCK("1",""),DEBT("2",""),FORWARD("3",""),COMPL("4","),
OTHER("5","");
private String name;
private String index;
// 构造方法
private EnumDemo(String index, String name) {
this.name = name;
this.index = index;
}

public static String getName(String index){
for(EnumDemo c:EnumDemo .values()){
if(c.index.equals(index)){
return c.name;
}
}
return null;
}
}

 

枚举定义以实现不同的方法，应用场景：版本控制

public enum EnumTest {
    MON(1), TUE(2), WED(3), THU(4), FRI(5), SAT(6) {
        @Override
        public boolean isRest() {
            return false;
        }
    },
    SUN(0) {
        @Override
        public boolean isRest() {
            return true;
        }
    };

    private int value;

    private EnumTest(int value) {
        this.value = value;
    }

    public int getValue() {
        return value;
    }

    public boolean isRest() {
        return false;
    }
    public static void main(String[] args) {
        System.out.println("EnumTest.FRI 的 value = " + EnumTest.FRI.getValue()+" "+EnumTest.FRI.isRest());
    }
}