以下是我的代码。即使正在调用动作侦听器函数 -
,GUI也不会在鼠标单击事件上自行清除package GUI;
import java.awt.Color;
import java.awt.Event;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseListener;
import javax.swing.*;
import ospackage.tablefunctions;
public class GUI_new extends JPanel implements ActionListener{
Graphics g1;
JButton buttonNext = new JButton();
int L=0;
public void display() {
final JFrame f=new JFrame("Rectangle");
f.setContentPane(new GUI_new());
f.setSize(1000,1000);
f.setVisible(true);
f.getContentPane().setBackground(Color.BLACK);
f.setLayout(null);
f.add(buttonNext);
buttonNext.setBounds(900,30, 200, 200);
buttonNext.setVisible(true);
buttonNext.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
//printBlocks(g, 100);
//buttonNext.revalidate();
removeAll();
revalidate();
//f.repaint();
//System.out.println("called repaint");
repaint();
System.out.println("called");
}
});
}
tablefunctions io = new tablefunctions();
public void paint(final Graphics g) {
super.paint(g);
printBlocks(g, 0);
}
public void printBlocks(Graphics g , int offset ) {
int i=0,j=0,l=offset;
for(i=20;i<620;i=i+60) {
for(j=20;j<820;j=j+80) {
String temp=Integer.toString(l);
if(!io.retrieveData("FAT","address" , 2, temp).equals("free"))
g.setColor(Color.RED);
else
g.setColor(Color.GREEN);
g.drawRect(j, i, 60, 30);
g.fillRect(j, i, 60, 30);
g.drawString("Cluster" + l,j , i-5 );
l++;
}
}
}
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
// e.getSource().equals()
}
public static void main(String[] args) {
GUI_new gn = new GUI_new();
gn.display();
}
}
答案 0 :(得分:4)
GUI_new
的两个实例存在问题。替换:
f.setContentPane(new GUI_new());
with:
f.setContentPane(this);
问题是actionPerformed
重新绘制this
实例,但JFrame
内容是使用第二个实例初始化的。
请注意,使用absolute layout可能很复杂,通常可以避免。有关一些想法,请参阅A Visual Guide to Layout Managers。
另外,请覆盖paintComponent()
而不是paint()
。见Performing Custom Painting。
答案 1 :(得分:3)
试试这个:
GUI_new.this.removeAll();
GUI_new.this.updateUI();