open.java

java语言实现的一个画图小程序,可以实现绘图

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package drawfigure;
import java.awt.Color;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.*;
import java.awt.event.*;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;

public class Open extends JFrame
{   int i,sx,sy,x,y,blue,green,red;
    String bool;
    boolean fill;
    JLabel  fname;
    JLabel  path;
    JTextField jTextFieldfname;
    JTextField jTextFieldpath;
    JButton open;
    JButton exit;
     Open(final DrawFigure draw)
     {  
        this.setLayout(null);//设置布局管理器为null
        File file=new File("画图文件");
        if(!file.exists()) file.mkdir(); 
    	//初始化各个控件
    	fname=new JLabel("文件名");
    	path=new JLabel("保存路径");
    	jTextFieldfname=new JTextField();    
        jTextFieldpath=new JTextField(file.getAbsolutePath());  
    	open= new JButton("打开");
    	exit=new JButton("取消");

    	//设置控件位置
    	this.fname.setBounds(10,10,80,20);
        this.path.setBounds(10,50,80,20);
        this.jTextFieldfname.setBounds(100,10,200,20);
    	this.jTextFieldpath.setBounds(100,50,200,20);
        this.open.setBounds(30, 100, 100, 30);
        this.exit.setBounds(200, 100, 100, 30);

    	//将控件添加到面板上
        this.add(fname);
        this.add(path);
        this.add(jTextFieldfname);
        this.add(jTextFieldpath);
        this.add(open);
        this.add(exit);
    	this.setBounds(330,300,350,200);
    	this.setTitle("打开");
    	this.setVisible(true);
     open.addActionListener(new ActionListener()
     {public void actionPerformed(ActionEvent e)
      {  draw.stack.clear();
         draw.delStack.clear();
         String p,f;
         p=jTextFieldpath.getText();
         f=jTextFieldfname.getText();
         File pa=new File(p,f);
             try {
                    if (!pa.exists()) {
                       JOptionPane.showMessageDialog(null,"文件不存在","错误",JOptionPane.INFORMATION_MESSAGE);
                     }
                   else{
                       BufferedReader output = new BufferedReader(new FileReader(pa)); 
                    String str;
                    while((str=output.readLine())!=null){
                      int h=0,t=1;
                      while(str.charAt(t)!='\t')   
                           {t++;}
                      i=Integer.parseInt(str.substring(h,t));h=t+1;t=t+2;
                      while(str.charAt(t)!='\t')
                           {t++;}
                      sx=Integer.parseInt(str.substring(h,t));h=t+1;t=t+2;
                      while(str.charAt(t)!='\t')
                           {t++;}
                      sy=Integer.parseInt(str.substring(h,t));h=t+1;t=t+2;
                      while(str.charAt(t)!='\t')
                           {t++;}
                      x=Integer.parseInt(str.substring(h,t));h=t+1;t=t+2;
                        while(str.charAt(t)!='\t')
                           {t++;}
                      y=Integer.parseInt(str.substring(h,t));h=t+1;t=t+2;
                      while(str.charAt(t)!='\t')  
                           {t++;}
                      blue=Integer.parseInt(str.substring(h,t));h=t+1;t=t+2;
                        while(str.charAt(t)!='\t')
                           {t++;}
                      green=Integer.parseInt(str.substring(h,t));h=t+1;t=t+2;
                        while(str.charAt(t)!='\t')
                           {t++;}
                      red=Integer.parseInt(str.substring(h,t));h=t+1;t=t+2;
                        while(str.charAt(t)!='\t')
                           {t++;}
                      bool=str.substring(h,t);
                      if(bool.equals("true")) fill=true;
                      else fill=false;
                      Color c = new Color(red,green,blue);
                      if(i==1)
                      {
                      Lines lines = new Lines();
                      lines.setValue(sx, sy, x, y, c);
                      draw.stack.push(lines);
                      }  
                     if(i==2)
                     {
                         Circle circle = new Circle();
                        circle.setValue(sx, sy, x, y, c,fill);
                        draw.stack.push(circle);
                      }
                      if(i==3)
                      {
                       Rectangle rectangle = new Rectangle();
                        rectangle.setValue(sx, sy, x, y, c, fill);
                        draw.stack.push(rectangle);
                       }
               }
                     
                    output.close();setVisible(false);
                     draw.repaint();
                      }
                    } catch (IOException ex) {
                        Logger.getLogger(Save.class.getName()).log(Level.SEVERE, null, ex);  
                    }                                    
      }
    });
     exit.addActionListener(new ActionListener()
     {public void actionPerformed(ActionEvent e)
      {
          setVisible(false);repaint();
      }
    });
      }
}