我希望我的按钮'licz':将信息的文本值更改为''loading'',执行某些操作并将'info'更改为“done”。 ('licz'在这里是一个JButton,'info'JLabel)
licz.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
info.setText("Loading..."); // Here
if(go())
{
brute(0);
info.setText("Done!"); //here
if(odwrot)
JOptionPane.showMessageDialog(frame, "good");
else
JOptionPane.showMessageDialog(frame, "bad");
}
else
{
JOptionPane.showMessageDialog(frame, "bad");
info.setText("Done"); // And here
}
}
});
但该程序首先制作“东西”,将“信息”标签更改为“加载”并立即更改为“完成”,如何保留这些以防万一?
答案 0 :(得分:1)
actionPerformed事件在事件处理线程上处理,应该快速终止以具有响应GUI。因此请致电invokeLater
。
licz.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
info.setText("Loading...");
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
boolean good = false;
if (go())
{
brute(0);
good = odwrot;
}
JOptionPane.showMessageDialog(frame, good ? "good" : "bad");
info.setText("Done");
}
});
}
});
或者在java 8中:
licz.addActionListener((e) -> {
info.setText("Loading...");
EventQueue.invokeLater(() -> {
boolean good = false;
if (go())
{
brute(0);
good = odwrot;
}
JOptionPane.showMessageDialog(frame, good ? "good" : "bad");
info.setText("Done");
});
});