JAVA中paintComponent无法被调用???!!
importjava.awt.Graphics;importjavax.swing.*;publicclassTestPaintComponentextendsJFram...
import java.awt.Graphics;
import javax.swing.*;
public class TestPaintComponent extends JFrame {
public TestPaintComponent(){
add(new NewLabel("Banner"));
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
TestPaintComponent frame = new TestPaintComponent();
frame.setTitle("TestPaintCompinent");
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(300,200);
frame.setVisible(true);
}
}
class NewLabel extends JLabel {
public NewLabel(String text){
super(text);
}
protected void painComponent(Graphics g){
super.paintComponent(g);
g.drawLine(0, 0, 50, 50);
}
}
这个代码根本无法画出线来。。。?!! 展开
import javax.swing.*;
public class TestPaintComponent extends JFrame {
public TestPaintComponent(){
add(new NewLabel("Banner"));
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
TestPaintComponent frame = new TestPaintComponent();
frame.setTitle("TestPaintCompinent");
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(300,200);
frame.setVisible(true);
}
}
class NewLabel extends JLabel {
public NewLabel(String text){
super(text);
}
protected void painComponent(Graphics g){
super.paintComponent(g);
g.drawLine(0, 0, 50, 50);
}
}
这个代码根本无法画出线来。。。?!! 展开
2个回答
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