java图形程序设计、事件处理与Swing实验报告.doc

集美大学计算机工程学院实验报告课程名称： Java班级： 网络0911实验成绩：指导教师： 郑如滨姓名： 钟小平实验项目名称： 图形程序设计、事件处理与Swing学号： 2009811012上机实践日期： 2011-5-19实验项目编号： 实验九组号：上机实践时间： 15:551、 实验目的 学会图形程序设计，掌握框架的创建，如何添加组件，如何在框架中画图形等问题； 学会AWT事件处理机制，掌握监听器的用法； 学会各类库的常用方法以及集合类的用法。2、 实验内容与设计思想1.画出正弦曲线与相应坐标线。package net.sy9_1;import java.awt.*;import java.awt.geom.*;import javax.swing.JFrame;import javax.swing.JComponent;import java.awt.EventQueue;import java.util.*;class DrawComponent extends JComponent public void paintComponent(Graphics g) Graphics2D g2 = (Graphics2D) g;for (int i = 180; i 540; i+) double j = 150+ Math.sin(i * 3.14 / 180) * 100 ;System.out.println(j);Line2D line = new Line2D.Double(i, j, i, j);g2.draw(line);Line2D line1 = new Line2D.Double(180, 30, 180, 350);g2.draw(line1);Line2D line2 = new Line2D.Double(0, 150, 600, 150);g2.draw(line2);class DrawFrame extends JFrame private static final int WIDTH = 600;private static final int HEIGHT = 300;public DrawFrame() setTitle(SIN);setSize(WIDTH, HEIGHT);DrawComponent component = new DrawComponent();add(component);public class SinTest public static void main(String args) EventQueue.invokeLater(new Runnable() public void run() DrawFrame frame = new DrawFrame();frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setVisible(true););2.进一步根据选择画出余弦曲线或者画出自己编写表达式的曲线3.如何对该代码进行改造，实现对前面的正弦曲线进行拖动，拖拽某个点以改变曲线的图形。类似DraggableCurve.jar执行的效果进阶：实现拖动整个曲线的效果。进阶：实现简单的画笔程序package net.sy9_2;import java.awt.*;import java.awt.event.*;import java.util.*;import java.awt.geom.*;import javax.swing.*;public class SinDrawTest public static void main(String args) EventQueue.invokeLater(new Runnable() public void run() MouseFrame frame = new MouseFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); ); class MouseFrame extends JFrame public MouseFrame() setTitle(Mouse_Sin); setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT); MouseComponent component = new MouseComponent(); add(component); public static final int DEFAULT_WIDTH = 450; public static final int DEFAULT_HEIGHT =400;class MouseComponent extends JComponent public MouseComponent() xpoint = new ArrayList(); xp = null; setsinx(50,200,400); addMouseListener(new MouseHandler(); addMouseMotionListener(new MouseMotionHandler(); public void setsinx(double x1,double y1,int gap) double x2=0; double y2=y1; xp =new Point2D.Double(x1, y1); xpoint.add(xp); for(;x2gap;) x1=x1+1; y1=y2-(Math.sin(x2/50)*100; xp =new Point2D.Double(x1, y1); xpoint.add(xp); x2=x2+1; xp=null; public void paintComponent(Graphics g) Graphics2D g2 = (Graphics2D) g; double x=0,y=0; g2.draw(new Line2D.Double(50, 0,50, 400); g2.draw(new Line2D.Double(0,200, 400, 200); if(!xpoint.isEmpty() Iterator iter=xpoint.iterator(); if(iter.hasNext() Point2D p1=iter.next(); x=p1.getX(); y=p1.getY(); while(iter.hasNext() Point2D p1=iter.next(); g2.draw(new Line2D.Double(x,y,p1.getX(),p1.getY(); x=p1.getX(); y=p1.getY(); public Point2D find(Point2D p) double x = p.getX(); double y = p.getY(); Iterator iter=xpoint.iterator(); while(iter.hasNext() xp=iter.next(); if(x(xp.getX()-2) if(y(xp.getY()-2) return xp; return null; public void remove(Point2D s) if (s = null) return; if (s = xp) xp = null; xpoint.remove(s); repaint(); private ArrayList xpoint; private Point2D xp; private class MouseHandler extends MouseAdapter public void mousePressed(MouseEvent event) xp = find(event.getPoint(); public void mouseClicked(MouseEvent event) xp = find(event.getPoint();if (xp != null & event.getClickCount() = 2) remove(xp); private class MouseMotionHandler implements MouseMotionListener public void mouseMoved(MouseEvent event) if (find(event.getPoint() = null) setCursor(Cursor.getDefaultCursor(); else setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR); public void mouseDragged(MouseEvent event) Point2D p=event.getPoint(); if (xp != null) xp.setLocation(p.getX(),p.getY(); repaint(); 3、 实验使用环境EditPlus，windows74、 实验步骤和调试过程 实验步骤：1、 先复习课本上的相关知识，如类的定义及其用法等知识点。2、 针对实验内容，应用相关知识设计实验操作，上机实践操作。3、 在上机过程中发现错误后，积极了解错误的原因。4、 根据原因解决问题（翻阅书本、问同学），再重新上机实践验证。5、 努力地完成实验相关内容和做好实验报