j03190501.java

一些java程序

import java.lang.*;

/*
enum month // month 简易版本一
{
 sunday,monday,tuesday,wednesday,thursday,friday,saturday;
}*/
enum month // month 版本二
{
 sunday(0),monday(1),tuesday(2),wednesday(3),
 thursday(4),friday(5),saturday(6);

 private int value;    // 自定义成员变量
 private month( int a ) // month 的构造函数
 {
   System.out.print( a + "  " );
   value = a;
 }
 public int showValue() //自定义成员函数
 {
   return value;
 }
}
public class j03190501
{
  public static void main( String[] para )
  {
    month monthObj;  // 定义 monthObj 的 month 枚举类型对象变量
    monthObj = month.monday; //赋予monthObj枚举变量值 monday

    System.out.println( "\n" + monthObj.showValue() );

    System.out.println( "ordinal()="+monthObj.ordinal() );
    switch( monthObj )  // 在 switch 中使用 enum类型
    {
      case sunday:
        System.out.println( "monthObj=sunday" ); break;
      case monday:
        System.out.println( "monthObj=monday" ); break;
      case tuesday:
        System.out.println( "monthObj=tuesday" ); break;
      case wednesday:
        System.out.println( "monthObj=wednesday" ); break;
      case thursday:
        System.out.println( "monthObj=thursday" ); break;
      case friday:
        System.out.println( "monthObj=friday" ); break;
      case saturday:
        System.out.println( "monthObj=saturday" ); break;
    }
  }
}