告诉我如何自动滚动JPanel？
JScrollBar sb = scroll.getVerticalScrollBar();
scroll.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
testPanel.setLayout(new BoxLayout(testPanel, BoxLayout.Y_AXIS));
scroll.getViewport().add(testPanel);
scroll.getViewport().setAutoscrolls(true);
button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
testPanel.add(new JLabel("<html><img height='80' width='100' src='https://developer.cdn.mozilla.net/media/img/mdn-logo-sm.png' /></html>"));
testPanel.updateUI();
sb.setValue(sb.getMaximum());
}
});
一切似乎都在起作用，但滚动效果还不算结束，图片不在视线范围内。