canlendar.java

一个用java编写的日历,可以在网页中用applet的形式展现出来.绝对源码.

import java.awt.*;
import java.applet.*;
import java.applet.Applet;
import java.awt.Graphics;
import java.lang.String;
import java.lang.Integer;

public class Canlendar extends Applet {
	
	private Choice list1;
    private int wholedays;
	private int months[]={31,29,31,30,31,30,31,31,30,31,30,31};  //每一月的天数
	private int weekdate;
	private int num=1;
	private boolean total=false;          //判断是否全部显示
	private Graphics2D s;
	
	public void init() 
	{
	   list1=new Choice();
	
	   list1.addItem("1");
	   list1.addItem("2");
	   list1.addItem("3");
	   list1.addItem("4");
	   list1.addItem("5");
	   list1.addItem("6");
	   list1.addItem("7");
	   list1.addItem("8");
	   list1.addItem("9");
	   list1.addItem("10");
	   list1.addItem("11");
	   list1.addItem("12");
	   add(list1);
//	   s=new Graphics2D();
	   weekdate=2;                          //1月1日的星期数
	   int i,j;
	   int a,b,c;
	   b=0;
	   //下面计算个位数与星期数相等的总的天数
	   for(i=0;i<12;i++)
	   {  
	      for(j=1;j<=months[i];j++)
	      {
	      	a=j%10;              //取个位数
	      	c=(weekdate+(j+b-1)%7)%7;      //计算当前这一天的星期数
	      	if(a==c) wholedays++;
	      }
	      b+=months[i];
        }
	  
	   	
	}
	public boolean action(Event e,Object o)
	{
		String states;
	
		if(e.target instanceof Choice)
		{
			states=list1.getSelectedItem();
			num=Integer.valueOf(states).intValue();
			repaint();
			
	
		}
	   return true;
		
		
	}

	public void paint(Graphics g) 
	{
	     g.setColor(new Color(200,0,255));
	      g.fill3DRect(0,0,600,500,true);
	      g.setColor(new Color(20,90,25));
	      g.fillOval(25,30,410,250);
		  g.setColor(Color.blue);
		  g.setFont(new Font("TimesRoman",Font.PLAIN,20));
		  g.drawString("2008年日历", 120, 25 );
		  g.drawString("月份",280,25);
		  g.drawString("日期的个位数与星期相等的总天数为"+Integer.toString(wholedays),60,220);
		  
		  g.setColor(Color.red);
		  g.setFont(new Font("Bold",Font.ITALIC,14));
		  g.drawString("日     一     二     三     四      五      六",120,70);
		  g.setColor(Color.black);
		  int startweek;
		  int currentweek;
		  int totaldays=0;
		  int i,j;
		  int localx=120;
		  int localy=90;
		  for(i=0;i<num-1;i++)
		     totaldays+=months[i];
		 
		  startweek=(weekdate+(totaldays)%7)%7;     //计算当前月第一天的星期
		  currentweek=startweek;
		  g.setFont(new Font("Bold",Font.ITALIC,14));
		
	   
		  for(i=1;i<=months[num-1];i++)                 //画出日历
		  {
		      if(currentweek%7==6) 
		      {
		      	
		      	
		      	localx=120+6*36;
		       	g.drawString(Integer.toString(i),localx,localy);
		       	
		      	localy+=20;
		      	currentweek++;
		      	continue;
		      }
		     j=currentweek%7;
		     localx=120+j*36;
		     g.drawString(Integer.toString(i),localx,localy);
		     currentweek++;
		   
		  }

			
	
		return;
		
		
		
	}
	
	
}