year.java

这是一个在java环境下实现的日历应用程序

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Year extends Box implements ActionListener
{
	int year;
	JTextField showYear=null;
	JButton nextyear,lastyear;
		MyCalendar calendar;
	public Year(MyCalendar calendar)
	{
		super(BoxLayout.X_AXIS);
			showYear=new JTextField(4);
			showYear.setForeground(Color.blue);
		showYear.setFont(new Font("TimesRoman",Font.BOLD,14));
		this.calendar=calendar;
		year=calendar.getYear( );
		nextyear=new JButton("下年");
		lastyear=new JButton("上年");
		add(lastyear);
		add(showYear);
		add(nextyear);
		showYear.addActionListener(this);
		lastyear.addActionListener(this);
		nextyear.addActionListener(this);
	
	}
	public void setYear(int Year)
	{ 
	  
	   	this.year=year;
	   		showYear.setText(" " +year);
	      }
	      
	     
	   public int getYear( )
	   { 
	      return year;
	   }
	   public void actionPerformed(ActionEvent e)
	   { 
	     if(e.getSource( )==lastyear)
	     {
	     		year=year-1;
	     		showYear.setText(" " +year);
	     		calendar.setYear(year);
	     		calendar.setcalendar(year,calendar.getMonth( ));
	     	}
	     else if(e.getSource( )==nextyear)
	     	{
	     		year=year+1;
	     		showYear.setText(" " +year);
	     		calendar.setYear(year);
	     		calendar.setcalendar(year,calendar.getMonth( ));
	     	}
	     		     
	    else if(e.getSource( )==showYear)
	     {
	     	try
	     	{
	     		year=Integer.parseInt(showYear.getText( ));
	     		showYear.setText(" " +year);
	     		calendar.setYear(year);
	     		calendar.setcalendar(year,calendar.getMonth( ));
	     		
	     	}
	     	catch(NumberFormatException ee)
	     	{
	     		showYear.setText(" " +year);
	     		calendar.setYear(year);
	     		calendar.setcalendar(year,calendar.getMonth( ));
	     	}
	     }
	   }
	}