我创建了两个包Display和paint_core，其中包含五个Java文件：Displayable.java，Drawing.java，NewCordinates.java，{{1} }和OldCordinates.java。
我正面临一些坐标问题，输出没有达到要求。我的计划有什么问题？
Main.java
Main.java package paint_core;
import Display.Displayable;
public class Main {
public Main() {
}
public static void main(String[] args) {
new Displayable();
}
}
Displayable.java package Display;
import java.awt.Color;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import javax.swing.JFrame;
public class Displayable extends JFrame implements MouseListener,MouseMotionListener{
Drawing dr;
int x,y;
OldCordinates op;
public Displayable()
{
setVisible(true);
dr = new Drawing();
add(dr);
dr.addMouseListener(this);
dr.addMouseMotionListener(this);
setDefaultCloseOperation(EXIT_ON_CLOSE);
}
public void mouseDragged(MouseEvent e)
{
NewCordinates np = new NewCordinates();
np.setX(x);
np.setY(y);
np.setW(e.getX()-x);
np.setH(e.getY()-y);
op= dr.setXY(np.getX(),np.getY(),np.getW(),np.getH(),Color.RED,op);
}
public void mouseMoved(MouseEvent e)
{
}
public void mouseClicked(MouseEvent e)
{
}
public void mousePressed(MouseEvent e) {
x=e.getX();
y=e.getY();
op = new OldCordinates();
op.setX(x);
op.setY(y);
op.setW(x);
op.setH(y);
}
public void mouseReleased(MouseEvent e) {
}
public void mouseEntered(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
}
}
Drawing.java package Display;
import java.awt.*;
import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JPanel;
public class Drawing extends JPanel
{
private int x,y,w,h;
Color r;
OldCordinates op;
public OldCordinates setXY(int x,int y,int w,int h,Color r,OldCordinates op)
{
this.x = x;
this.y = y;
this.w = w;
this.h = h;
this.r = r;
this.op = op;
//System.out.println("Old Cordinates" + op.getW()+" "+op.getY());
repaint();
op.setH(h);
op.setW(w);
//System.out.println("New Cordinates" + w+" "+h);
return op;
}
@Override
public void paint(Graphics g) {
g.drawRect(op.getX(),op.getY(),op.getW(),op.getH());
g.setColor(r);
g.drawRect(x,y,w,h);
}
}
OldCordinates.java package Display;
import java.awt.*;
import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JPanel;
public class Drawing extends JPanel
{
private int x,y,w,h;
Color r;
OldCordinates op;
public OldCordinates setXY(int x,int y,int w,int h,Color r,OldCordinates op)
{
this.x = x;
this.y = y;
this.w = w;
this.h = h;
this.r = r;
this.op = op;
//System.out.println("Old Cordinates" + op.getW()+" "+op.getY());
repaint();
op.setH(h);
op.setW(w);
//System.out.println("New Cordinates" + w+" "+h);
return op;
}
@Override
public void paint(Graphics g) {
//g.drawRect(op.getX(),op.getY(),op.getW(),op.getH());
g.setColor(r);
g.drawRect(x,y,w,h);
}
}
NewCordinates.java答案 0 :(得分：0)
您应该覆盖paintComponent而不是paint。如果这不是您的问题，请提供更多详细信息