java 枚举

import java.util.EnumMap;

public class Mytest {

public static void main(String[] args) {

System.out.println(Status.A.ordinal());

System.out.println(getName(Status.A));

System.out.println(Status1.A.getStatus());

System.out.println(Status1.A.getDescr());

}

private enum Status {

PLACEHOLDER, A, B, C, D, E, F;

// PLACEHOLDER这里作占位符使用,我们在程序中常用0表示所有状态(便于查询等);

};

public static String get(Status s) {

EnumMap em = new EnumMap(Status.class);

em.put(Status.A, "a");

em.put(Status.B, "b");

em.put(Status.C, "c");

em.put(Status.D, "d");

em.put(Status.E, "e");

em.put(Status.F, "f");

return em.get(s);

}

public static String getName(Status status) {

switch (status) {

case A:

return "a";

case B:

return "b";

case C:

return "c";

case D:

return "d";

case E:

return "e";

case F:

return "f";

default:

return "";

}

}

}// end of class

enum Status1 {

A(1), B(2), C(3), D(4), E(5), F(6);

private int status;

private Status1(int status) {

this.status = status;

}

public int getStatus() {

return status;

}

public String getDescr() {

switch (this) {

case A:

return "a";

case B:

return "b";

case C:

return "c";

case D:

return "d";

case E:

return "e";

case F:

return "f";

default:

return "";

}

}

}