dale.java

关于学生信息管理的小程序

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.Date;
import java.text.SimpleDateFormat;

public class dale implements ActionListener,ItemListener
{
    TextField tf1,tf2,tf3,tf5;
    Checkbox cb1,cb2;
    Choice c1;
    Label t1=new Label("NO:");
    Label t2=new Label("NAME:");
    Label t3=new Label("当前时间:");
    Label t4=new Label("选中的记录:");
    Label t5=new Label("JAVA课程设计－信息输入",(Label.CENTER));
    Label t6=new Label("制作人: 01级 计4班 23号 袁芳",(Label.CENTER));
    Label t7=new Label("指导老师: 傅卓军",(Label.CENTER));
    
    List ls1,ls2;
    Button b1,b2,b3,b4,b5,b6,b7,b8;
    FileDialog fd;
    File file1 = null;
    Frame f;
    int k=0;
	static TextField tf4;
	   
    public void display() 		
    {
    	Panel p1,p2,p3,p4,p5,p6,p7,p8,p9;
    	CheckboxGroup cg;
        f = new Frame("java课程设计－信息输入");
        f.setSize(650,400);
        f.setLocation(250,170);
    	

    	f.setBackground(Color.lightGray);
        f.setLayout(new GridLayout(1,3));       
        ls1 = new List();						 //创建列表框
        ls1.addItemListener(this);                      
		f.add(ls1);                              //占据窗口左半部分
        p1 = new Panel(); 
        p1.setLayout(new GridLayout(7,1));       //网格布局,7行1列
        f.add(p1);                               //占据窗口中间部分
        tf1 = new TextField ("1",25);            //创建文本行
        tf2 = new TextField ("",25);
        tf3 = new TextField ("Filename:null",10);
        tf4 = new TextField ("",25);
        tf5 = new TextField (26);
        
        cg = new CheckboxGroup();              //创建复选框组
        cb1 = new Checkbox("male",cg,true);    //创建单选按钮
        cb2 = new Checkbox("female",cg,false);
        c1=new Choice();
        c1.addItem("浙江");
        c1.addItem("湖南");
        c1.addItem("江西");
        c1.addItem("江苏");
        c1.addItemListener(this);              //注册选择框事件监听程序
        ls2 = new List(5,false);
		ls2.add("温州");        
        ls2.add("杭州");        
       	ls2.add("宁波");        
        

        b1 = new Button("First");
		b2 = new Button("Prior");
		b3 = new Button("Next");
		b4 = new Button("Last");
		b5 = new Button("Add");
		b6 = new Button("Delete");
		b7 = new Button("Open");
		b8 = new Button("Save");
		
		b1.setForeground(Color.red);		//设置按钮颜色
	 //	b2.setForeground(Color.red);
		b3.setForeground(Color.red);
	//	b4.setForeground(Color.red);
		b5.setForeground(Color.red);
	//	b6.setForeground(Color.red);
		b7.setForeground(Color.red);
	//	b8.setForeground(Color.red);
	
	    t1.setForeground(Color.blue);		//设置标签字体颜色
	    t2.setForeground(Color.blue);
	    t3.setForeground(Color.blue);
	    t4.setForeground(Color.blue);
		
		b1.addActionListener(this);
		b2.addActionListener(this);
		b3.addActionListener(this);
		b4.addActionListener(this);			//为按钮注册监听监听程序
		b5.addActionListener(this);
		b6.addActionListener(this);
		b7.addActionListener(this);
        b8.addActionListener(this);
        p4 = new Panel(); 
        p4.setLayout(new FlowLayout(FlowLayout.LEFT));
        p4.add(t1);
        p4.add(tf1);
        p5 = new Panel(); 
        p5.setLayout(new FlowLayout(FlowLayout.LEFT));
        p5.add(t2);
        p5.add(tf2);
        
        p1.add(p4);                          
        p1.add(p5);
      
        p2 = new Panel(); 
        p2.setLayout(new FlowLayout(FlowLayout.LEFT));
        p2.add(cb1);
        p2.add(cb2);
        p1.add(p2);
        p1.add(c1);
        p1.add(ls2);
		p1.add(tf3);
		tf3.setEditable(false);		
		tf3.setFont(new Font("Dialog",0,12));
		p3 = new Panel(); 
        p3.setLayout(new GridLayout(2,4));  
        p3.add(b1);
		p3.add(b2);
		p3.add(b3);
		p3.add(b4);
		p3.add(b5);
		p3.add(b6);
		p3.add(b7);
		p3.add(b8);
		p1.add(p3);
		p6 = new Panel();
		p6.setLayout(new GridLayout(3,1));
	
		p7 = new Panel(); 
        p7.setLayout(new FlowLayout(FlowLayout.LEFT));
		p7.add(t3);
		p7.add(tf4);
		p6.add(p7);
		
		p8 = new Panel(); 
        p8.setLayout(new FlowLayout(FlowLayout.LEFT));		
		p8.add(t4);
		p8.add(tf5);
		p6.add(p8);	
		
		p9 = new Panel(); 	
		p9.setLayout(new GridLayout(3,1));
		p9.add(t5);
		p9.add(t6);
		p9.add(t7);
		p6.add(p9);
		 
		f.add(p6);
		
		Date  time=new Date();
		String today=time.toLocaleString();
	    int s,m,h;						  
	    s=time.getSeconds();			  //获取当前系统时间方法
	    m=time.getMinutes();
	    h=time.getHours();
	    tf4.setEditable(false);
	    Thread1 d=new Thread1();          //创建线程对象      
        d.start();						  //启动线程执行
		
		f.addWindowListener(new WinClose()); //注册窗口监听程序
		f.setVisible(true);
    }
    
     public  class WinClose extends WindowAdapter
     {
    	public void windowClosing(WindowEvent e)
        {
    	   System.exit(0);
        }
     }
    
    public static void main(String arg[])
    {
      	 (new dale()).display();
      	 
     } 
     
     
    public static class Thread1 extends Thread//显示当前系统时间
    {	
	   public Thread1(){}
	 
       public void run()		     //覆盖run方法的线程体
       {   
        int i=1;
        String str1;
     
        while(i==1)					//每秒刷新一次
         {    
          try
           { 
              Date today=new Date();
              SimpleDateFormat sdf;
              sdf=new SimpleDateFormat("MM月dd日 a  hh:mm:ss");
              str1=sdf.format(today);
              tf4.setText(str1);       
              sleep(1000);                       //睡眠一秒钟
           }
          catch(InterruptedException e)
           { System.out.println(e);}
         }
       }
    }	 
      
    
    public void actionPerformed(ActionEvent e)	//监听按钮事件
    {
    	if(e.getSource()==b1)		//单击FIRST按钮
    	{
    		ls1.select(0);	
    	}
    	
    	if(e.getSource()==b2)		//单击PRIOR按钮
    	{
    		if(ls1.isIndexSelected(0))
                 ls1.select(ls1.getItemCount()-1);
            else
                 ls1.select(ls1.getSelectedIndex()-1);
    	}
    	
    	if(e.getSource()==b3)		//单击NEXT按钮
    	{
    		if(ls1.isIndexSelected(ls1.getItemCount()-1))
                  ls1.select(0);
            else
              	  ls1.select(ls1.getSelectedIndex()+1);	
    	}
    	
    	if(e.getSource()==b4)		//单击LAST按钮
    	{
       		ls1.select(ls1.getItemCount()-1);
    	}
    	
    	if(e.getSource()==b5)	    //单击ADD按钮时
    	{
    		String str;
            str = tf1.getText()+"   "+tf2.getText();
            if (cb1.getState())               //单选按钮选中时,添加标签
                str = str +"   "+cb1.getLabel();
            if (cb2.getState())
                str = str +"   "+cb2.getLabel();
            str = str+"   "+c1.getSelectedItem(); //获得选择框的选中项
            str = str+"   "+ls2.getSelectedItem();
            str = str+"   "+tf4.getText();
            ls1.add(str);                        //添加列表框选项
            tf1.setText(""+(Integer.parseInt(tf1.getText())+1));//编号自加1	
    	}
    	
    	if(e.getSource()==b6)		//单击DELETE按钮
    	{
    		int i,j,k;
        	k=ls1.getItemCount();
        	if(k>0)
        	{i=ls1.getSelectedIndex();
        	ls1.remove(i);
            j=ls1.getItemCount();
            ls1.select(j-1);
            }
    	}
    	
    	if(e.getSource()==b7)		//单击OPEN按钮
    	{	int m;
    		ls1.removeAll();
            fd = new FileDialog(f,"Open",FileDialog.LOAD);
            fd.setVisible(true);
            if((fd.getDirectory()!=null)&&(fd.getFile()!=null))
            {
            	 try
                  {  
                     tf3.setText(fd.getDirectory()+fd.getFile());     	                        
                     file1 = new File(fd.getDirectory(),fd.getFile());
                     FileInputStream fin=new FileInputStream(file1);
                     ObjectInputStream in=new ObjectInputStream(fin);
                     m=6000;        
                     for(int i=0;i<m;i++)
                     ls1.add((String)in.readObject());	//读对象并显示
                     in.close();
                     
                     int k;
                     k=ls1.getItemCount();
                     ls1.select(k-1);
                     in.close();
                }
                
                catch(FileNotFoundException fe){}
                catch(IOException ioe){}
                catch(ClassNotFoundException ioe){}
                tf1.setText(""+(ls1.getItemCount()+1));
            }             
           
        }
            
    	if(e.getSource()==b8)		//单击SAVE按钮
    	{ 
   				
    		 if ((e.getSource()==b8)&&(file1==null))
            {       
                fd = new FileDialog(f,"Save",FileDialog.SAVE);
                if (file1==null)
                    fd.setFile("");
                else
                    fd.setFile(file1.getName());
                fd.setVisible(true);         
                
                if ((fd.getDirectory()!=null) && (fd.getFile()!=null))
                {
                	tf3.setText(fd.getDirectory()+fd.getFile());
                    file1 = new File(fd.getDirectory(),fd.getFile());
                    save(file1);               
                }
            }
            else
             save(file1); 
    		
    	}
    	
    	
   }
    
    public void save(File file1)
    {
  	    int m;
    	try
        {   
        	FileOutputStream fr = new FileOutputStream(file1);
            ObjectOutputStream out= new ObjectOutputStream(fr);
            m=ls1.getItemCount();	//列表框中记录条数
            for(int i=0;i<m;i++)
             out.writeObject(ls1.getItem(i));	//写入对象
            out.close();			//关闭对象流
        }
       catch(IOException ioe)
        {System.out.println(ioe);}           
            
    }
    
    
    public void itemStateChanged(ItemEvent e)
    {
    	if(c1.getSelectedIndex()==0)		//选中浙江
    	{
    		ls2.removeAll();
    		ls2.add("温州");        
            ls2.add("杭州");        
       	    ls2.add("宁波");        
        	
    	}
    	
    	if(c1.getSelectedIndex()==1)		//选中湖南
    	{
    		ls2.removeAll();
    		ls2.add("长沙");        
            ls2.add("株洲");        
       	    ls2.add("湘潭");
       	    ls2.add("常德");  
    	}
    	
    	if(c1.getSelectedIndex()==2)		//选中江西
    	{
    		ls2.removeAll();
    		ls2.add("南昌");        
            ls2.add("景德镇");        
       	    ls2.add("南平"); 
    	}
    	
    	if(c1.getSelectedIndex()==3)		//选中江苏
    	{
    		ls2.removeAll();
    		ls2.add("南京");        
            ls2.add("苏州");        
       	    ls2.add("无锡"); 
    	}
    	
    	if(e.getSource()==ls1)
    	{
    		String str2;
    		str2=ls1.getSelectedItem();
		    tf5.setText(str2);
		    b6.setEnabled(true);
		}
    }
    
}