我有一个在Swing中工作的秒表代码。我想让标签剩余时间300秒
居中于第二行。这是我的代码。
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.Timer;
public class TimerGUI extends JPanel {
JLabel promptLabel, timerLabel;
final int count = 30;
JButton start;
JButton end;
Timer timer;
public TimerGUI() {
setLayout(new GridLayout(0,2));
start = new JButton("Start");
add(start);
Event e = new Event();
start.addActionListener(e);
end = new JButton("End");
end.setEnabled(false);
add(end);
end.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
timer.stop();
start.setEnabled(true);
end.setEnabled(false);
timerLabel.setText("Time Remaining " + count + " seconds");
}
});
timerLabel = new JLabel("Time Remaining 300 seconds");
add(timerLabel);
}
private class Event implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
start.setEnabled(false);
end.setEnabled(true);
timerLabel.setText("Time Remaining " + count + " seconds");
TimeClass tc = new TimeClass(count);
timer = new Timer(1000, tc);
timer.start();
}
}
private class TimeClass implements ActionListener {
int counter;
public TimeClass(int count) {
this.counter = count;
}
@Override
public void actionPerformed(ActionEvent e) {
counter--;
if (counter <= 5) {
Toolkit.getDefaultToolkit().beep();
}
if (counter >= 1) {
timerLabel.setText("Time Remaining " + counter + " seconds");
} else {
timer.stop();
timerLabel.setText("game over");
}
}
}
public static void main(String[] args) {
JFrame myframe = new JFrame();
TimerGUI timer = new TimerGUI();
// myframe.getContentPane().add(content,BorderLayout.CENTER);
myframe.getContentPane().add(timer, BorderLayout.CENTER);
myframe.setTitle("Hangman Game");
myframe.pack();
myframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
myframe.setLocationRelativeTo(null);
myframe.setVisible(true);
}
}
编辑: 更改为这个。
timerLabel = new JLabel("Time Remaining 300 seconds");
add(timerLabel,SwingConstants.CENTER);
输出不同,请查看图片
BorderLayout
,但那似乎完全破坏了整个布局。 - brain stormtimerGUI
将成为mainGUI
的另一个组件。我会研究你的例子。 - brain storm