Question

好的，我正在从一个班级创建一个程序，我们称之为“John”类。因此，我不是从头开始，而是通过复制“Dave”类中的大多数代码创建“John”类（此类具有类似的设置但功能上有很大差异），然后根据我的需要进行大大修改。

问题是，当我点击“运行文件”按钮时，程序就像是“Dave”一样。这太荒谬了，我已经改变了很多代码，“John”现在看起来不像“Dave”了。所以这必须是netbeans做的。如何解决？

编辑：

所以这是约翰：

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package javaapplication1;

/**
 *
 * @author PCKhoi
 */
import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;

public class ImageBlink {
    static DrawingCanvas canvas;
    private BufferedImage bi;
    private int w,h;
    public ImageBlink() {
        Frame f = new Frame("Click!");
        f.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
        URL imageSrc = null;
        try {
            imageSrc = new URL("what_I_think.jpg");
        } catch (MalformedURLException ex) {
            Logger.getLogger(ImageDemo.class.getName()).log(Level.SEVERE, null, ex);
        }
        try {
            bi = ImageIO.read(imageSrc);
            w = bi.getWidth(null);
            h = bi.getHeight(null);
        } catch (IOException e) {
            System.out.println("Image could not be read");
            System.exit(1);
        }
        canvas = new DrawingCanvas();
        f.add(canvas, BorderLayout.CENTER);
        f.pack();
        f.setVisible(true);
    }
    public static void main(String[] args) {
        new PaintDemo();
    }
    class DrawingCanvas extends Canvas implements MouseListener, MouseMotionListener {
        private int x1=0,y1=0,x2=0,y2=0;
        public Dimension getPreferredSize() {
            return new Dimension(600,600);
        }
        public DrawingCanvas() {
            super();
            addMouseListener(this);
            addMouseMotionListener(this);
            setBackground(Color.white);
        }
        public void paint(Graphics g) {
            Graphics2D g2D = (Graphics2D) g;
            g2D.drawImage(bi,x2,y2,x2+w,y2+h,x1,y1,x1+w,y1+h,null);
        }
        public void mousePressed(MouseEvent e) {
            throw new UnsupportedOperationException("Not supported yet.");
        }
        public void mouseReleased(MouseEvent e) {
            throw new UnsupportedOperationException("Not supported yet.");
        }
        public void mouseClicked(MouseEvent e) {
            x1 = x2;
            y1 = y2;
            x2 = (int)Math.random()*400;
            y2 = (int)Math.random()*449;
            canvas.repaint();
        }
        public void mouseDragged(MouseEvent e) {
            throw new UnsupportedOperationException("Not supported yet.");
        }

        public void mouseEntered(MouseEvent e) {
            throw new UnsupportedOperationException("Not supported yet.");
        }

        public void mouseExited(MouseEvent e) {
            throw new UnsupportedOperationException("Not supported yet.");
        }

        public void mouseMoved(MouseEvent e) {
            throw new UnsupportedOperationException("Not supported yet.");
        }
    }
}

这是戴夫：

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package javaapplication1;

/**
 *
 * @author PCKhoi
 */
import java.awt.*;
import java.awt.event.*;

public class PaintDemo {
    static DrawingCanvas canvas;
    private Stroke lineStroke;
    public PaintDemo() {
        Frame f = new Frame("Stroke a line!");
        f.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
        canvas = new DrawingCanvas();
        lineStroke = new BasicStroke(2.f);
        f.add(canvas, BorderLayout.CENTER);
        f.pack();
        f.setVisible(true);
    }
    public static void main(String[] args) {
        PaintDemo pd = new PaintDemo();
    }
    class DrawingCanvas extends Canvas implements MouseListener, MouseMotionListener {
        private int x1=0,y1=0,x2=200,y2=200;
        public Dimension getPreferredSize() {
            return new Dimension(300,300);
        }
        public DrawingCanvas() {
            super();
            addMouseListener(this);
            addMouseMotionListener(this);
            setBackground(Color.white);
        }
        public void paint(Graphics g) {
            Graphics2D g2D = (Graphics2D) g;
            g2D.setStroke(lineStroke);
            g2D.drawLine(x1, y1, x2, y2);
        }
        public void mousePressed(MouseEvent e) {
            x1 = e.getX();
            y1 = e.getY();
            x2 = x1;
            y2 = y1;
            System.out.println("x1: "+x1+"y1: "+y1);
            canvas.repaint();
        }
        public void mouseReleased(MouseEvent e) {
            x2 = e.getX();
            y2 = e.getY();
            System.out.println("x2: "+x2+"y2: "+y2);
            canvas.repaint();
        }
        public void mouseClicked(MouseEvent e) {
            canvas.repaint();
        }
        public void mouseDragged(MouseEvent e) {
            throw new UnsupportedOperationException("Not supported yet.");
        }

        public void mouseEntered(MouseEvent e) {
            throw new UnsupportedOperationException("Not supported yet.");
        }

        public void mouseExited(MouseEvent e) {
            throw new UnsupportedOperationException("Not supported yet.");
        }

        public void mouseMoved(MouseEvent e) {
            throw new UnsupportedOperationException("Not supported yet.");
        }
    }
}

Answer 1

在John的主要方法中

new PaintDemo(); // i.e. John's and Dave's main method initiate the same code

netbeans项目停止检查新代码

1 个答案: