如何在 Java GUI 中重置计时器并在停止后显示消息 [英] How To Reset a Timer in Java GUI and Display Message after Stop
问题描述
你好,美好的一天,我想创建一个重置按钮",我的计时器将在其中重置.我创建了一个新按钮并将其命名为重置",并使用代码tm2.restart();"但它在我创建的新按钮中不起作用.这是我的代码:
Hello Good day i want to create a "Reset Button" where my Timer will reset. I created a new button and named it as "reset" and i use the code "tm2.restart();" but its not working in my created New Button. This is my code:
import javax.swing.Timer;
public class deploy extends JFrame {
private int seconds;
private SimpleDateFormat df;
private boolean isRunning;
private JLabel lblTimer1;
private JButton btnStart1;
public deploy() {
lblTimer1 = new JLabel("New label");
lblTimer1.setForeground(Color.WHITE);
lblTimer1.setFont(new Font("Tahoma", Font.PLAIN, 20));
lblTimer1.setBounds(100, 231, 94, 16);
contentPane.add(lblTimer1);
Timer tm2 = new Timer(1000, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
setTimer();
seconds++;
}
});
btnStart1 = new JButton("Start");
btnStart1.setBackground(Color.LIGHT_GRAY);
btnStart1.setForeground(Color.BLUE);
btnStart1.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if(isRunning) {
tm2.stop();
btnStart1.setText("Start");
}else {
tm2.start();
btnStart1.setText("Stop");
}
isRunning = !isRunning;
}
});
我的计时器格式为SimpleDateFormat"(00:00:00),因为我正在创建一个网吧管理应用程序",客户将进入并记录他/她的时间,直到他/她退出并显示他/她将被还清的金额的消息.请帮忙.谢谢
My kind of timer is formatted as "SimpleDateFormat" (00:00:00) because i'm creating a "cybercafe management application" that the customer will walk in and records his/her time until he/she logged out and display a message the amount he/she will be payed off. please help. thanks
推荐答案
查看代码,有不清楚的地方不要犹豫:
Review code and don't hesitate to ask what is unclear:
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.Timer;
import javax.swing.border.EmptyBorder;
public class Deploy extends JFrame {
private int seconds;
private SimpleDateFormat df;
private JLabel lblTimer;
private Timer timer;
private JButton startButton;
public Deploy() {
JPanel contentPane = new JPanel();
contentPane.setBackground(Color.DARK_GRAY);
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(new BorderLayout());
lblTimer = new JLabel();
lblTimer.setForeground(Color.WHITE);
lblTimer.setFont(new Font("Tahoma", Font.PLAIN, 20));
lblTimer.setPreferredSize(new Dimension(100,30));
contentPane.add(lblTimer,BorderLayout.NORTH);
timer = new Timer(1000, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
setTimer();
seconds++;
}
});
JPanel buttonsPanel = new JPanel();
contentPane.add(buttonsPanel, BorderLayout.SOUTH);
startButton = new JButton("Start");
startButton.setBackground(Color.LIGHT_GRAY);
startButton.setForeground(Color.BLUE);
startButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if(timer.isRunning()) {
timer.stop();
startButton.setText("Start");
}else {
timer.start();
startButton.setText("Stop");
}
}
});
startButton.setPreferredSize(new Dimension(100,30));
buttonsPanel.add(startButton);
JButton resetButton = new JButton("Reset");
resetButton.setBackground(Color.LIGHT_GRAY);
resetButton.setForeground(Color.RED);
resetButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
resetTimer();
}
});
resetButton.setPreferredSize(new Dimension(100,30));
buttonsPanel.add(resetButton);
df = new SimpleDateFormat("HH:mm:ss"); // HH for 0-23
df.setTimeZone(TimeZone.getTimeZone("GMT"));
resetTimer();
pack();
setVisible(true);
}
private void setTimer() {
Date d = new Date(seconds * 1000L);
String time = df.format(d);
lblTimer.setText(time);
}
private void resetTimer() {
if(timer.isRunning()) {
timer.stop();
}
startButton.setText("Start");
seconds = 0;
setTimer();
}
public static void main(String[] args) {
new Deploy();
}
}
这篇关于如何在 Java GUI 中重置计时器并在停止后显示消息的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!