绘图板.doc

绘图板 import java.awt.*; import java.awt.geom.*; import java.awt.event.*; import javax.swing.*; import javax.swing.filechooser.FileNameExtensionFilter; import java.io.*; import java.util.*; import java.lang.Deprecated; public class mydrawing { public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { DrawPad newPad=new DrawPad(); newPad.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); newPad.setVisible(true); } }); } } class DrawPad extends JFrame //主类，扩展了JFrame类，用来生成主界面 { private ObjectInputStream input; private ObjectOutputStream output; //定义输入输出流，用来调用和保存图像文件 private int current=3; //设置默认画图状态为随笔画 private DrawPanel drawingArea; //画图区域 private int DEFAULT_WIDTH=650; private int DEFAULT_HEIGHT=450; private Color color=Color.black; //当前画笔颜色 private float stroke=1.0f; //设置画笔粗细，默认值为1.0f public drawings[] Elements=new drawings[5000]; //用来存放基本图形的数组 public int index=0; //当前已经绘制的图形数目 public int R,G,B; //用来存放当前色彩值 public int f1,f2; //用来存放当前字体风格 public JPanel drawingArea1 = new JPanel(); public JCheckBox bold,italic; //bold为粗体，italic为斜体，二者可以同时使用 @SuppressWarnings(unchecked) public DrawPad() { setTitle(画笔); setSize(DEFAULT_WIDTH,DEFAULT_HEIGHT); setLocation(320,150); drawingArea=new DrawPanel(); JMenuBar bar=new JMenuBar(); //定义菜单条 JMenu fileMenu=new JMenu(文件); JMenuItem newItem=new JMenuItem(新建); newItem.setAccelerator(KeyStroke.getKeyStroke(ctrl N)); newItem.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { newFile(); //如果被触发，则调用新建文件函数段 } }); fileMenu.add(newItem); JMenuItem loadItem=new JMenuItem(打开); loadItem.setAccelerator(KeyStroke.getKeyStro