我正在编写一个程序,当点击鼠标时,将绘制一个圆圈.到目前为止我写的下面的代码.
import java.awt.*;
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.event.*;
import java.awt.geom.*;
public class test extends JFrame implements ActionListener,MouseListener {
Shape circle = new Ellipse2D.Float(10,10,10);
public test () {
setSize(250,150);
addMouseListener(this);
}
public static void main(String[] args) {
//TODO code application logic here
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
test frame = new test();
frame.setVisible(true);
}
});
}
public void actionPerformed(ActionEvent ae) {
}
public void drawCircle(int x,int y) {
Graphics g = this.getGraphics();
g.drawOval(x,y,x,y);
g.setColor(Color.BLACK);
g.fillOval(x,2,2);
}
public void mouseClicked(MouseEvent e) {
drawCircle(e.getX(),e.getY());
repaint();
}
public void mouseExited(MouseEvent e) {
}
public void mousePressed(MouseEvent e) {
}
public void mouseReleased(MouseEvent e) {
}
public void mouseEntered(MouseEvent e) {
}
}
解决方法
将鼠标单击(…)更改为：
int x,y;
public void mouseClicked(MouseEvent e) {
x = e.getX();
y = e.getY();
repaint();
}
覆盖油漆(…)：
@Override
public void paint(Graphics g) {
drawCircle(x,y);
}
