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());     } }