JScrollPane相關問題

Question

JComponent.unregisterKeyboardAction(KeyStroke) ?

Answer 1

我沒說清楚，我是問KeyStroke的參數

Answer 2

JComponent.unregisterKeyboardAction(KeyStroke.getKeyStroke(KeyEvent.VK_UP,0));应该是这个样子吧，好不好使没试过，因为一般不这么用的说。

Answer 3

unregisterKeyboardAction(KeyStroke.getKeyStroke(KeyEvent.VK_DOWN,0)
VK_UP,VK_LEFT,VK_RIGHT

Answer 4

or unregisterKeyboardAction(KeyStroke.getKeyStroke("DOWN")

Answer 5

为什么我在JScrollPane上按上、下箭头没反应呢？我什么都没做。

Answer 6

你的JViewPort是不是比JScrollPane大？要滿足JViewPort比JScrollPane大才行

Answer 7

1.2.2?
贴出来你看
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;public class ScrollDemo extends JPanel 
{
class JP extends JPanel
{
public JP()
{
setPreferredSize(new Dimension(500,500));
} public void paint(Graphics g)
{
g.drawString("111",90,90);
g.fillRect(100,100,300,300);
}
}    private JLabel picture; public ScrollDemo()
{
JP picture1 = new JP();
//picture1.setPreferredSize(new Dimension(500,500));
JScrollPane jsp = new JScrollPane();
jsp.setAutoscrolls(true);
jsp.setViewportView(picture1);
jsp.setPreferredSize(new Dimension(300, 250));
add(jsp);
}
public static void main(String s[]) {
JFrame frame = new JFrame("ScrollDemo");
frame.addWindowListener(new WindowAdapter() 
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});
 
frame.getContentPane().add(new ScrollDemo());
frame.pack();
frame.setVisible(true);
}
}没反应。