JAVA画图程序（ghj）

import java.awt.*; import java.awt.event.*; import java.io.*; import javax.swing.*; public class Draw extends JFrame implements ActionListener,java.io.Serializable { private String[] Buttonnames={ "新建", "打开", "保存", "曲线", "直线", "矩形", "实心矩形", "椭圆", "实心椭圆", "圆", "实心圆", "圆角矩形", "实心圆角矩形", "三角形", "圆锥形", "橡皮擦", "颜色选择", "线条粗细选择", "文字" }; private String[] stylewords={ "宋体", "隶书", "华文彩云", "黑体"}; private JButton[] buttons;//存放按钮 private JCheckBox bold,italic;//粗体，斜体 private JComboBox fontstyles;//字体名字 private DrawPanel drawingPanel;//画图区域 private Drawings[] DrawList=new Drawings[500000];//定义图元，即每一个标记点 private int currentDraw=3;//标记 int index=0;//作为DrawList的标记 private Color color=Color.black; int R=0,G=0,B=0; float stroke=1.0f; int font1,font2; String style; JMenuItem newFile; JMenuItem openFile; JMenuItem saveFile; JMenuItem quitFile; JMenuItem choseColor; JMenuItem chosestroke; JMenuItem helpButton; private ObjectInputStream input; private ObjectOutputStream output; public Draw() { drawingPanel=new DrawPanel(); //ButtonsListener buttonsListener=new ButtonsListener(); JMenuBar bar=new JMenuBar(); JMenu file=new JMenu("文件"); newFile=new JMenuItem("新建"); newFile.addActionListener(this); openFile=new JMenuItem("打开"); openFile.addActionListener(this); saveFile=new JMenuItem("保存"); saveFile.addActionListener(this); quitFile=new JMenuItem("退出"); quitFile.addActionListener(this); file.add(newFile); file.add(openFile); file.add(saveFile); file.add(quitFile); bar.add(file); JMenu color=new JMenu("颜色"); choseColor=new JMenuItem("选择颜色"); choseColor.addActionListener(this); color.add(choseColor); bar.add(color); JMenu stroke=new JMenu("大小"); chosestroke=new JMenuItem("选择线条粗细"); chosestroke.addActionListener(this); stroke.add(chosestroke); bar.add(stroke); JMenu help=new JMenu("帮助"); helpButton=new JMenuItem("帮助信息"); helpButton.addActionListener(this); help.add(helpButton); bar.add(help); JPanel buttonsPanel=new JPanel(); buttonsPanel.setLayout(new GridLayout(2,6)); buttons=new JButton[Buttonnames.length-5]; for(int i=3;i<Buttonnames.length-3;i++) { buttons[i-3]=new JButton(Buttonnames[i]); buttons[i-3].addActionListener(this); buttonsPanel.add(buttons[i-3]); } buttons[13]=new JButton(Buttonnames[18]); buttons[13].addActionListener(this); buttonsPanel.add(buttons[13]); JPanel FontPanel=new JPanel(); bold=new JCheckBox("黑体"); bold.addActionListener(this); italic=new JCheckBox("斜体"); italic.addActionListener(this); fontstyles=new JComboBox(stylewords); fontstyles.addActionListener(this); FontPanel.add(bold); FontPanel.add(italic); FontPanel.add(fontstyles); createNewDrawList(); getContentPane().setLayout(new BorderLayout(1,2)); getContentPane().add(buttonsPanel,BorderLayout.SOUTH); getContentPane().add(FontPanel,BorderLayout.NORTH); super.setJMenuBar( bar ); getContentPane().add(drawingPanel,BorderLayout.CENTER); } //按钮消息响应函数 public void actionPerformed(ActionEvent e) { if(e.getSource()==newFile) { newFile(); } if(e.getSource()==openFile) { openFile(); } if(e.getSource()==saveFile) { saveFile(); } if(e.getSource()==quitFile) { System.exit(0); } if(e.getSource()==helpButton) { JOptionPane.showMessageDialog(null,"本程序实现了新建、打开、保存，绘画曲线、直线、矩形、实心矩形、椭圆、实心椭圆、圆、\n实心圆、圆角矩形、" + "实心圆角矩形、三角形、圆锥形，文字，橡皮擦，颜色选择，线条粗细选择等功能！\n注：选择文字选项时，只需点击绘图区，输入文字即可将文字输入到点击的位置！","帮助信息", JOptionPane.INFORMATION_MESSAGE); } for(int j=3;j<Buttonnames.length-3;j++)//一一比较 { if(e.getSource()==buttons[j-3]) { currentDraw=j; createNewDrawList(); repaint(); } } if(e.getSource()==buttons[13]) { JOptionPane.showMessageDialog(null,"请用鼠标点击要写入文字的位置"); currentDraw=16; createNewDrawList(); repaint(); } else if(e.getSource()==choseColor)//颜色 { //设置画笔颜色 color=JColorChooser.showDialog(Draw.this,"选择一个颜色",color); R=color.getRed(); G=color.getGreen(); B=color.getBlue(); DrawList[index].R=R; DrawList[index].G=G; DrawList[index].B=B; } else if(e.getSource()==chosestroke)//线条粗细 { String input=JOptionPane.showInputDialog(null,"请输入线条粗细度(浮点数)","画图",JOptionPane.QUESTION_MESSAGE); try {stroke=Float.parseFloat(input);} catch(Exception ex) { return; } DrawList[index].stroke=stroke; } else if(e.getSource()==fontstyles) { style=stylewords[fontstyles.getSelectedIndex()]; } else //粗体，斜体 { if(e.getSource()==bold) if(bold.isSelected()) font1=Font.BOLD; else font1=Font.PLAIN; if(e.getSource()==italic) if(italic.isSelected()) font2=Font.ITALIC; else font2=Font.PLAIN; } } public void newFile() { //返回初始状态 index=0; currentDraw=3; color=Color.black; stroke=1.0f; createNewDrawList(); repaint(); } public void openFile() { JFileChooser fileChooser=new JFileChooser(); fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);//只能选一个 int r=fileChooser.showOpenDialog(this); if(r==JFileChooser.CANCEL_OPTION) return; File fileName=fileChooser.getSelectedFile(); fileName.canRead(); if(fileName==null||fileName.getName().equals("")) JOptionPane.showMessageDialog(null,"请写入文件名字"); else { try{ FileInputStream files=new FileInputStream(fileName); input=new ObjectInputStream(files); Drawings inputDraw; int countNumber=input.readInt();//记录对象个数 for(index=0;index<countNumber;index++) { inputDraw=(Drawings)input.readObject(); DrawList[index]=inputDraw; } createNewDrawList(); input.close(); files.close(); repaint(); } catch(Exception ex) { JOptionPane.showMessageDialog(null,"111"); } } } public void saveFile() { JFileChooser fileChooser=new JFileChooser(); fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);//只能选一个 int r=fileChooser.showOpenDialog(this); if(r==JFileChooser.CANCEL_OPTION) return; File fileName=fileChooser.getSelectedFile(); fileName.canWrite(); if(fileName==null||fileName.getName().equals("")) JOptionPane.showMessageDialog(null,"请写入文件名字"); else { try{ fileName.delete(); FileOutputStream files=new FileOutputStream(fileName,true); output=new ObjectOutputStream(files); Drawings outputDraw; output.writeInt(index); for(int j=0;j<index;j++) { outputDraw=DrawList[j]; output.writeObject(outputDraw); output.flush(); } output.close(); files.close(); } catch(IOException ioe) { ioe.printStackTrace(); } } } class DrawPanel extends JPanel implements MouseListen