calendarframe1.java

里面写的是 一些J2SE 的日历和 计算机的代码 还有时间钟表的代码 供初学者参考

import java.util.*;
import java.awt.*;
import java.awt.event.*;

public class CalendarFrame1 extends Frame{
	
	//Panel pBar = new PanelBar();
	PanelDate pDate = new PanelDate();
	Panel pChoice = new PanelChoice(pDate);
	
	public CalendarFrame1(String title){
		super(title);
		pChoice.setBackground(new Color(200,220,240));
		
		pDate.setBackground(new Color(100,240,225));
		this.setLayout(new BorderLayout(10,10));
		this.add(pChoice,BorderLayout.NORTH);
		this.add(pDate);
		this.setBounds(200,400,400,300);
		this.setVisible(true);
		this.addWindowListener(new WindowAdapter(){
			public void windowClosing(WindowEvent e){
				CalendarFrame1.this.dispose();
			} 
		});
		
	}
	public static void main(String[] args){
		CalendarFrame1 f = new CalendarFrame1("2000~2020日历");
	}
}
//包含两个Choice的面板
class PanelChoice extends Panel{ //implements ItemListener{
	Choice yearCh = new Choice();
	Choice monthCh = new Choice();
	PanelDate pDate;
	public PanelChoice(PanelDate pDate){
		this.pDate = pDate;
		for(int i=2000;i<=2020;i++){
			yearCh.add(String.valueOf(i));
		}
		for(int i=1;i<=12;i++){
			monthCh.add(String.valueOf(i));
		}
		yearCh.select("2008");
		monthCh.select("11");
		
		pDate.displayDate(2008,11);
		
		this.add(yearCh);
		this.add(new Label("年"));
		this.add(monthCh);
		this.add(new Label("月"));
		
		
		ItemListener il = new ItemListener(){
			public void itemStateChanged(ItemEvent e){
				int year = Integer.parseInt(yearCh.getSelectedItem());
				int month = Integer.parseInt(monthCh.getSelectedItem());
				PanelChoice.this.pDate.displayDate(year,month);
			}
		};
		
		yearCh.addItemListener(il);
		monthCh.addItemListener(il);
	
	}

}
//日期的面板
class PanelDate extends Panel{
	Label[] lBar = new Label[7];
	Label[] lDate= new Label[42];
	GregorianCalendar gc = new GregorianCalendar();
	final String[] WEEK ={"日","一","二","三","四","五","六"};
	public PanelDate(){
		this.setLayout(new GridLayout(7,7,5,5));
		
		for(int i=0;i<lBar.length;i++){
			lBar[i] = new Label(WEEK[i],Label.CENTER);
			lBar[i].setBackground(new Color(230,230,200));
			
			this.add(lBar[i]);
		}
		for(int i=0;i<lDate.length;i++){
			lDate[i] = new Label("",Label.CENTER);
			this.add(lDate[i]);
		}
		//this.displayDate(2008,11);
	}
	public void displayDate(int year,int month){
		for(int i=0;i<lDate.length;i++) lDate[i].setText("");//清空
		gc.set(year,month-1,1);//gc的值设置为当月第一天
		int firstDayLocation = gc.get(Calendar.DAY_OF_WEEK)-1;//判断是星期几
		int maxDay = gc.getActualMaximum(Calendar.DAY_OF_MONTH);
		//i控制日期,j控制位置,通过lDate下标
		for(int i=1,j=firstDayLocation;i<=maxDay;i++,j++)
		{
			lDate[j].setText(String.valueOf(i));
		}
	}
}