Java Enum和String及int的相互转化示例

/**
 * 性别枚举
 */
public enum Gender {
  male("男"),female("女");
 
  private String name;
 
  private Gender(String name) {
    this.name = name;
  }
 
  public String getName() {
    return name;
  }
}

public class MyMain {
  public static void main(String[] args) {
    Gender gender = Gender.male;
    System.out.println(gender.toString()); //Gender.male枚举常量的名称
    System.out.println(gender.getName());//Gender.male的name值
    System.out.println(gender.ordinal());//Gender.male枚举常量的序数
  }
}

String maleString = Gender.male.toString(); //Gender转化为String
Gender maleGender = Gender.valueOf("male"); //String转化为Gender，male对应Gender枚举的常量名称

int maleInt = Gender.male.ordinal(); 
//Enum转化为int，返回枚举常量的序数

enum ACTION{
 ac_Entry(10),ac_View(2),ac_Approve(5);
 private int _val;
 private static final Map<Integer,ACTION> keyMap=new HashMap<Integer,ACTION>();
 static{
  for (ACTION item:ACTION.values()){
  keyMap.put(item._val,item);
  }
 }
 public int getVal(){
  return _val;
 }
 ACTION(int val){
  _val=val;
 }
 public static ACTION fromVal(int pvnVal){
  return keyMap.get(pvnVal);
 }
 }
@Test
 public void testEnum(){
 ACTION e=ACTION.ac_View;
 System.out.println(e+","+e.ordinal()+","+e.getVal());
 e=ACTION.fromVal(5);
 System.out.println(e+","+e.ordinal()+","+e.getVal());
 }