java－paint.rar_javapaint_paint_paintjava_绘图_绘图程序java资源-CSDN文库

共65个文件

class：48个

gif：14个

java：2个

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paint

5星 · 超过95%的资源 147 浏览量 2022-09-24 12:22:52 上传评论收藏 56KB RAR 举报

Java绘图程序是一种基于Java语言实现的图形用户界面（GUI）应用，主要用于在屏幕上绘制各种图形。这个"java-paint.rar"压缩包包含了作者自己编写的Java绘图软件，据描述，它具备全面的功能，足以满足Java作业的要求。在本文中，我们将深入探讨Java中的绘图机制以及如何创建一个简单的绘图程序。 Java提供了AWT（Abstract Window Toolkit）和Swing库，这两个库都包含用于图形绘制的组件和工具。AWT是Java的早期GUI库，而Swing是建立在AWT之上的更高级别的库，提供了更多的功能和更好的平台独立性。在AWT中，`Graphics`类是用于绘图的基础，它提供了各种方法来绘制线条、形状、文本和图像。例如，`drawLine()`用于绘制直线，`drawRect()`用于绘制矩形，`fillCircle()`用于填充圆形等。而在Swing中，我们通常会使用`JComponent`或其子类如`JPanel`，并重写`paintComponent(Graphics g)`方法来进行绘制。`Graphics2D`是`Graphics`的一个子类，提供了更多的高级绘图功能，如旋转、缩放和抗锯齿处理。在创建Java绘图程序时，首先需要创建一个`JFrame`作为主窗口，然后添加一个`JPanel`作为绘图区。重写`JPanel`的`paintComponent(Graphics g)`方法，将所有绘图操作放在其中。`Graphics g`参数是系统提供的绘图上下文，通过它可以调用绘图方法。例如，你可以这样开始你的绘图程序： ```java import javax.swing.JFrame; import javax.swing.JPanel; import java.awt.Graphics; public class CustomDraw extends JPanel { @Override protected void paintComponent(Graphics g) { super.paintComponent(g); // 保证父类的绘图行为 // 在这里进行你的绘图操作，例如： g.setColor(java.awt.Color.BLUE); g.fillRect(50, 50, 100, 100); } public static void main(String[] args) { JFrame frame = new JFrame("Java Paint"); frame.setSize(400, 400); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.add(new CustomDraw()); frame.setVisible(true); } } ``` 上述代码将创建一个400x400像素的窗口，并在其中显示一个蓝色的100x100像素的矩形。你可以根据需要扩展`paintComponent`方法，添加更多的绘图逻辑。为了实现更复杂的绘图功能，如绘制曲线、多边形或者自定义形状，可以使用`g.drawPolygon(int[] xPoints, int[] yPoints, int nPoints)`和`g.fillPolygon(int[] xPoints, int[] yPoints, int nPoints)`方法。此外，`Graphics2D`还支持贝塞尔曲线（`drawBezierCurve()`）和其他复杂的图形路径。此外，Java绘图还可以利用鼠标监听器和键盘监听器来实现交互式绘图。例如，你可以监听鼠标点击事件来设置起点，监听鼠标拖动事件来绘制线条或形状。同样，键盘事件可以用来控制画笔的粗细、颜色或其他属性。在`www.pudn.com.txt`文件中，可能包含了关于这个绘图程序的更多详细信息，例如源代码、使用说明或问题解答。不过，由于这个压缩包没有提供该文件的具体内容，无法在此详细分析。 Java的绘图功能强大且灵活，允许开发者创建出功能丰富的图形界面应用程序。这个"java-paint.rar"项目就是一个很好的实践示例，对于学习Java GUI编程和图形绘制非常有帮助。

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java－paint.rar （65个子文件）

www.pudn.com.txt 218B

java

GraphicsPanel$PenListener.class 889B

line.gif 76B

GraphicsPanel$1.class 885B

GraphicsPanel$5.class 888B

GraphicsPanel$LineListener.class 891B

GraphicsPanel$ArcListener.class 890B

eraser.gif 160B

GraphicsPanel$CycleButton.class 637B

GraphicsPanel$NewListener.class 1KB

shi.GIF 892B

GraphicsPanel$BrushButton.class 637B

label.gif 91B

GraphicsPanel$SaveAsListener.class 3KB

rect.gif 82B

pencil.gif 145B

GraphicsPanel$RectListener.class 892B

GraphicsPanel$BrushListener.class 893B

GraphicsPanel$LargeListener.class 875B

GraphicsPanel$15.class 7KB

GraphicsPanel$PenButton.class 629B

GraphicsPanel$7.class 910B

GraphicsPanel$ColorListener.class 1KB

ExampleFileFilter.java 8KB

GraphicsPanel$SaveListener.class 3KB

GraphicsPanel.class 11KB

GraphicsPanel$14.class 5KB

GraphicsPanel$2.class 902B

get.gif 143B

poly.gif 119B

GraphicsPanel$DrawRectPanel.class 5KB

GraphicsPanel$6.class 919B

GraphicsPanel$DummyPanel.class 3KB

GraphicsPanel$PolyButton.class 635B

arc.gif 874B

cycle.gif 119B

GraphicsPanel$9.class 909B

GraphicsPanel.java 55KB

GraphicsPanel$10.class 922B

GraphicsPanel$FillButton.class 633B

GraphicsPanel$LineButton.class 633B

GraphicsPanel$8.class 907B

GraphicsPanel$LargeButton.class 637B

GraphicsPanel$PolyListener.class 905B

GraphicsPanel$12.class 883B

GraphicsPanel$3.class 893B

GraphicsPanel$getButton.class 629B

GraphicsPanel$13.class 2KB

GraphicsPanel$OpenListener.class 2KB

GraphicsPanel$CycleListener.class 894B

mspaint.gif 418B

GraphicsPanel$ArcButton.class 631B

GraphicsPanel$ToolPanel.class 628B

GraphicsPanel$11.class 872B

GraphicsPanel$GetListener.class 890B

GraphicsPanel$RectButton.class 633B

GraphicsPanel$IColorListener.class 1KB

glass.gif 173B

GraphicsPanel$FillListener.class 1KB

brush.gif 156B

GraphicsPanel$EraserButton.class 642B

GraphicsPanel$EraserListener.class 896B

ExampleFileFilter.class 3KB

GraphicsPanel$4.class 907B

fill.gif 175B

import javax.swing.*; import javax.swing.filechooser.*; import javax.swing.JComponent.*; import java.io.File; import java.awt.*; import java.awt.Frame.*; import java.awt.Font.*; import java.awt.Graphics.*; import java.awt.Graphics2D.*; import java.awt.Color.*; import java.awt.BasicStroke.*; import java.awt.event.*; import java.util.*; import java.lang.Math.*; import java.awt.AWTException; import java.awt.image.*; import java.lang.Exception.*; import java.io.*; import javax.imageio.*; import javax.imageio.stream.*; public class GraphicsPanel { public int Bgt[][]=new int[1000000][8]; public Color colorChoice[]=new Color[1000000]; public int Graphicsnum=0; public JFrame aFrame; public int toolState=4; public int polyPoint[][]=new int[500][2]; public int Pointnum=0; public int Textnum=0; public int lineStyle=1; public int paintStyle=1; public int brushStyle=1; public int newState=0; public String fileName="未命名"; public String filePaths=""; public Color preColor=Color.black; public Color backColor=Color.white; public DrawRectPanel aPanel; public JPanel colorPanel; public JPanel statePanel; public DummyPanel dummyPanel; public JPanel leftPanel; public JColorChooser aColorChooser; public JTextField helpText; public JTextField pointText; public JTextField rightText; public ToolPanel toolPanel; public JPanel toolPanel1; public JMenuBar aMenuBar; public JMenu fileMenu,editMenu,helpMenu,viewMenu,colorMenu,ImageMenu; public JMenuItem openMenuItem,saveMenuItem,saveAsMenuItem,newMenuItem; public JMenuItem colorMenuItem; public JMenuItem iColorMenuItem; //copyMenuItem,cutMenuItem; public JButton colorButton; public RectButton rectButton; public CycleButton cycleButton; public LineButton lineButton; public ArcButton arcButton; public PolyButton polyButton; public FillButton fillButton; public EraserButton eraserButton; public PenButton penButton; public BrushButton brushButton; public LargeButton largeButton; public getButton getButton; public JTextArea aTextField; public JFileChooser aFileChooser,bFileChooser; public ActionListener rectListener,cycleListener,lineListener,arcListener,polyListener,fillListener,eraserListener,penListener,brushListener,colorListener,largeListener,getListener,saveListener; public Color oldColor; public GraphicsPanel() { aFrame=new JFrame(); aTextField=new JTextArea(); aFrame.setTitle(fileName+"-画图"); aColorChooser=new JColorChooser(); aFileChooser=new JFileChooser(); bFileChooser=new JFileChooser(); //UIManager.put("bFileChooser.newFolderIcon","mspaint.gif"); colorPanel=new JPanel(); aPanel=new DrawRectPanel(); toolPanel=new ToolPanel(); leftPanel=new JPanel(); aMenuBar=new JMenuBar(); toolPanel1=new JPanel(); statePanel=new JPanel(); dummyPanel=new DummyPanel(); fileMenu=new JMenu("文件(F)"); fileMenu.setFont(new Font("menuFont",Font.PLAIN,12)); editMenu=new JMenu("编辑(E)"); editMenu.setFont(new Font("menuFont",Font.PLAIN,12)); viewMenu=new JMenu("查看(V)"); viewMenu.setFont(new Font("menuFont",Font.PLAIN,12)); ImageMenu=new JMenu("图像(I)"); ImageMenu.setFont(new Font("menuFont",Font.PLAIN,12)); colorMenu=new JMenu("颜色(C)"); colorMenu.setFont(new Font("menuFont",Font.PLAIN,12)); helpMenu=new JMenu("帮助(H)"); helpMenu.setFont(new Font("menuFont",Font.PLAIN,12)); newMenuItem=new JMenuItem("新建(N)"); newMenuItem.setFont(new Font("menuFont",Font.PLAIN,12)); openMenuItem=new JMenuItem("打开(O)"); openMenuItem.setFont(new Font("menuFont",Font.PLAIN,12)); saveMenuItem=new JMenuItem("保存(S)"); saveMenuItem.setFont(new Font("menuFont",Font.PLAIN,12)); saveAsMenuItem=new JMenuItem("另存为(A)"); saveAsMenuItem.setFont(new Font("menuFont",Font.PLAIN,12)); colorMenuItem=new JMenuItem("编辑颜色(E)..."); colorMenuItem.setFont(new Font("menuFont",Font.PLAIN,12)); iColorMenuItem=new JMenuItem("反色(I)"); iColorMenuItem.setFont(new Font("menuFont",Font.PLAIN,12)); //cutMenuItem=new JMenuItem("剪切"); //copyMenuItem=new JMenuItem("复制"); helpText=new JTextField(); helpText.setPreferredSize(new Dimension(250,20)); helpText.setEditable(false); helpText.setBorder(BorderFactory.createLoweredBevelBorder()); pointText=new JTextField(); pointText.setEditable(false); pointText.setBorder(BorderFactory.createLoweredBevelBorder()); rightText=new JTextField(); rightText.setPreferredSize(new Dimension(60,20)); rightText.setEditable(false); rightText.setBorder(BorderFactory.createLoweredBevelBorder()); rectButton=new RectButton(); rectButton.setIcon(new ImageIcon("rect.gif")); cycleButton=new CycleButton(); cycleButton.setIcon(new ImageIcon("cycle.gif")); lineButton=new LineButton(); lineButton.setIcon(new ImageIcon("line.gif")); arcButton=new ArcButton(); arcButton.setIcon(new ImageIcon("arc.gif")); polyButton=new PolyButton(); polyButton.setIcon(new ImageIcon("poly.gif")); fillButton=new FillButton(); fillButton.setIcon(new ImageIcon("fill.gif")); eraserButton=new EraserButton(); eraserButton.setIcon(new ImageIcon("eraser.gif")); penButton=new PenButton(); penButton.setIcon(new ImageIcon("pencil.gif")); brushButton=new BrushButton(); brushButton.setIcon(new ImageIcon("brush.gif")); colorButton=new JButton(); colorButton.setBackground(preColor); colorButton.setPreferredSize(new Dimension(20,20)); largeButton=new LargeButton(); largeButton.setIcon(new ImageIcon("glass.gif")); getButton=new getButton(); getButton.setIcon(new ImageIcon("get.gif")); lineListener=new LineListener(); arcListener=new ArcListener(); polyListener=new PolyListener(); cycleListener=new CycleListener(); rectListener=new RectListener(); fillListener=new FillListener(); penListener=new PenListener(); eraserListener=new EraserListener(); brushListener=new BrushListener(); colorListener=new ColorListener(); largeListener=new LargeListener(); getListener=new GetListener(); saveListener=new SaveListener(); lineButton.addActionListener(lineListener); arcButton.addActionListener(arcListener); fillButton.addActionListener(fillListener); polyButton.addActionListener(polyListener); cycleButton.addActionListener(cycleListener); rectButton.addActionListener(rectListener); penButton.addActionListener(penListener); brushButton.addActionListener(brushListener); eraserButton.addActionListener(eraserListener); colorButton.addActionListener(colorListener); largeButton.addActionListener(largeListener); getButton.addActionListener(getListener); fileMenu.setMnemonic('F'); editMenu.setMnemonic('E'); openMenuItem.setAccelerator(KeyStroke.getKeyStroke( KeyEvent.VK_O,InputEvent.CTRL_MASK,false)); saveMenuItem.setAccelerator(KeyStroke.getKeyStroke( KeyEvent.VK_S,InputEvent.CTRL_MASK,false)); newMenuItem.setAccelerator(KeyStroke.getKeyStroke( KeyEvent.VK_N,InputEvent.CTRL_MASK,false)); iColorMenuItem.setAccelerator(KeyStroke.getKeyStroke( KeyEvent.VK_I,InputEvent.CTRL_MASK,false)); openMenuItem.addActionListener(new OpenListener()); newMenuItem.addActionListener(new NewListener()); saveMenuItem.addActionListener(saveListener); saveAsMenuItem.addActionListener(new SaveAsListener()); iColorMenuItem.