这样动态添加控件 public class Frame1 extends JFrame { JButton btn4; public Frame1() { addMouseListener(new hand()); setSize(400,400); } class hand extends MouseAdapter { public void mouseClicked(MouseEvent e) { if(e.getButton()==1) { btn4=new JButton("insert"); getContentPane().add(btn4,BorderLayout.CENTER); btn4.setSize(100,100); btn4.setVisible(true); } } } }
画线就这样直接画就可以了呀。 public class Frame1 extends JFrame { public Frame1() { setSize(400,400); } public void paint(Graphics g) { g.drawLine(10,10,300,200); } }
import java.awt.*; import java.awt.event.*; import javax.swing.*;public class Frame1 extends JFrame { JButton btn4; JFrame f=new JFrame(); public Frame1() { Container con = f.getContentPane(); f.add(btn4); addMouseListener(new hand()); setSize(400,400); }
private void displayFrame() { btn4=new JButton("insert"); this.getContentPane().add(btn4,BorderLayout.CENTER); btn4.setVisible(true); f.setCursor(DEFAULT_CURSOR); } class hand extends MouseAdapter { public void mouseClicked(MouseEvent e) { if(e.getButton()==1) { displayFrame(); } } } }
public class Frame1 extends JFrame
{
JButton btn4; public Frame1()
{
addMouseListener(new hand());
setSize(400,400);
} class hand extends MouseAdapter
{
public void mouseClicked(MouseEvent e)
{
if(e.getButton()==1)
{
btn4=new JButton("insert");
getContentPane().add(btn4,BorderLayout.CENTER);
btn4.setSize(100,100);
btn4.setVisible(true);
}
}
}
}
public class Frame1 extends JFrame
{
public Frame1()
{
setSize(400,400);
}
public void paint(Graphics g)
{
g.drawLine(10,10,300,200);
}
}
import java.awt.event.*;
import javax.swing.*;public class Frame1 extends JFrame
{
JButton btn4;
JFrame f=new JFrame(); public Frame1()
{
Container con = f.getContentPane();
f.add(btn4);
addMouseListener(new hand());
setSize(400,400);
}
private void displayFrame()
{
btn4=new JButton("insert");
this.getContentPane().add(btn4,BorderLayout.CENTER);
btn4.setVisible(true);
f.setCursor(DEFAULT_CURSOR); } class hand extends MouseAdapter
{
public void mouseClicked(MouseEvent e)
{
if(e.getButton()==1)
{
displayFrame();
}
}
}
}