JAVA实现简单的画图板

JAVA实现简单的画图板

楼主写一个html，很容易把下面代码嵌入到applet，可以google一下实现，还有copy自己不知道算不算复制。。。-_-!--------------------------------------------------------------------楼主给你一个我的，直接保存成pb.java编译运行，就是你要的画图功能 ，可以参考一下 ____________________________________________________________________ import java.applet.*; import java.awt.*; import java.awt.event.*; import java.util.*; import javax.swing.*; import java.awt.geom.*; import java.io.*; class Point implements Serializable { int x,y; Color col; int tool; int boarder; Point(int x, int y, Color col, int tool, int boarder) { this.x = x; this.y = y; this.col = col; this.tool = tool; this.boarder = boarder; } } class paintboard extends Frame implements ActionListener,MouseMotionListener,MouseListener,ItemListener { int x = -1, y = -1; int con = 1;//画笔大小 int Econ = 5;//橡皮大小 int toolFlag = 0;//toolFlag:工具标记 //toolFlag工具对应表： //（0--画笔）；（1--橡皮）；（2--清除）； //（3--直线）；（4--圆）；（5--矩形）； Color c = new Color(0,0,0); //画笔颜色 BasicStroke size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);//画笔粗细 Point cutflag = new Point(-1, -1, c, 6, con);//截断标志 Vector paintInfo = null;//点信息向量组 int n = 1; FileInputStream picIn = null; FileOutputStream picOut = null; ObjectInputStream VIn = null; ObjectOutputStream VOut = null; // *工具面板--画笔，直线，圆，矩形，多边形,橡皮，清除*/ Panel toolPanel; Button eraser, drLine,drCircle,drRect; Button clear ,pen; Choice ColChoice,SizeChoice,EraserChoice; Button colchooser; Label 颜色,大小B,大小E; //保存功能 Button openPic,savePic; FileDialog openPicture,savePicture; paintboard(String s) { super(s); addMouseMotionListener(this); addMouseListener(this); paintInfo = new Vector(); /*各工具按钮及选择项*/ //颜色选择 ColChoice = new Choice(); ColChoice.add("black"); ColChoice.add("red"); ColChoice.add("blue"); ColChoice.add("green"); ColChoice.addItemListener(this); //画笔大小选择 SizeChoice = new Choice(); SizeChoice.add("1"); SizeChoice.add("3"); SizeChoice.add("5"); SizeChoice.add("7"); SizeChoice.add("9"); SizeChoice.addItemListener(this); //橡皮大小选择 EraserChoice = new Choice(); EraserChoice.add("5"); EraserChoice.add("9"); EraserChoice.add("13"); EraserChoice.add("17"); EraserChoice.addItemListener(this); //////////////////////////////////////////////////// toolPanel = new Panel(); clear = new Button("清除"); eraser = new Button("橡皮"); pen = new Button("画笔"); drLine = new Button("画直线"); drCircle = new Button("画圆形"); drRect = new Button("画矩形"); openPic = new Button("打开图画"); savePic = new Button("保存图画"); colchooser = new Button("显示调色板"); //各组件事件监听 clear.addActionListener(this); eraser.addActionListener(this); pen.addActionListener(this); drLine.addActionListener(this); drCircle.addActionListener(this); drRect.addActionListener(this); openPic.addActionListener(this); savePic.addActionListener(this); colchooser.addActionListener(this); 颜色 = new Label("画笔颜色",Label.CENTER); 大小B = new Label("画笔大小",Label.CENTER); 大小E = new Label("橡皮大小",Label.CENTER); //面板添加组件 toolPanel.add(openPic); toolPanel.add(savePic); toolPanel.add(pen); toolPanel.add(drLine); toolPanel.add(drCircle); toolPanel.add(drRect); toolPanel.add(颜色); toolPanel.add(ColChoice); toolPanel.add(大小B); toolPanel.add(SizeChoice); toolPanel.add(colchooser); toolPanel.add(eraser); toolPanel.add(大小E); toolPanel.add(EraserChoice); toolPanel.add(clear); //工具面板到APPLET面板 add(toolPanel,BorderLayout.NORTH); setBounds(60,60,900,600); setVisible(true); validate(); //dialog for save and load openPicture = new FileDialog(this,"打开图画",FileDialog.LOAD); openPicture.setVisible(false); savePicture = new FileDialog(this,"保存图画",FileDialog.SAVE); savePicture.setVisible(false); openPicture.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { openPicture.setVisible(false); } }); savePicture.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { savePicture.setVisible(false); } }); addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0);} }); } public void paint(Graphics g) { Graphics2D g2d = (Graphics2D)g; Point p1,p2; n = paintInfo.size(); if(toolFlag==2) g.clearRect(0,0,getSize().width,getSize().height);//清除 for(int i=0; i