JAVA画图

使用Java实现图形界面画图功能

最新推荐文章于 2025-11-27 10:55:11 发布

最新推荐文章于 2025-11-27 10:55:11 发布 · 114 阅读

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#java

本文介绍如何使用Java编程语言，通过图形界面实现基本的画图功能，包括监听鼠标事件并绘制线条。

package gui; import java.awt.*; import java.awt.event.*; public class PaintFrame extends Frame { private static final long serialVersionUID = 1L; private int _x, _y, x, y; private boolean bps = false; public void paint(Graphics g) { if (bps) { Color c = g.getColor(); g.setColor(Color.RED); g.drawLine(_x, _y, x, y); g.setColor(c); } } public PaintFrame() { this.setBounds(230, 100, 600, 500); this.setTitle("画图"); this.setResizable(false); this.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); this.addMouseListener(new MouseAdapter() { public void mousePressed(MouseEvent e) { _x = e.getX(); _y = e.getY(); } public void mouseReleased(MouseEvent e) { bps = false; } }); this.addMouseMotionListener(new MouseMotionAdapter() { public void mouseMoved(MouseEvent arg0) { bps = true; } public void mouseDragged(MouseEvent e) { x = e.getX(); y = e.getY(); PaintFrame.this.paint(PaintFrame.this.getGraphics()); _x = x; _y = y; } }); this.setVisible(true); } public static void main(String[] args) { new PaintFrame(); } }