我正在尝试使用Timer
为我的应用程序创建登录图片。这个想法是,当用户打开应用程序时,他会看到一张图片5秒钟,然后应用程序就会启动。
我试过,正如您在方法shoutoff()
中看到的那样:
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package login;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.Timer;
/**
*
* @author isslam
*/
public class login extends javax.swing.JFrame {
Timer time;
/**
* Creates new form login
*/
public login() {
initComponents();
setLocation(350, 200);
time = new Timer(5000,new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
dispose();
}
});
time.setRepeats(false);
}
public void shoutoff(){
if (!time.isRunning()) {
time.start();
}
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jLabel1 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setAlwaysOnTop(true);
setCursor(new java.awt.Cursor(java.awt.Cursor.DEFAULT_CURSOR));
setLocationByPlatform(true);
setUndecorated(true);
setResizable(false);
jLabel1.setIcon(new javax.swing.ImageIcon("C:\\Users\\isslam\\Desktop\\one_piece_marble_play_by_iviarker-d511vb0.jpg")); // NOI18N
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel1)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel1)
);
pack();
}// </editor-fold>
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(login.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(login.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(login.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(login.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new login().setVisible(true);
new login().shoutoff();
}
});
}
// Variables declaration - do not modify
private javax.swing.JLabel jLabel1;
// End of variables declaration
}
答案 0 :(得分:3)
首先在构造函数中创建Timer
一次。 Timer
也应仅使login
的CURRENT实例关闭
public login() {
//...
time = new Timer(5000,new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
dispose();
}
});
timer.setRepeats(false);
}
在shoutoff
方法中,您启动计时器......
public void shoutoff(){
if (!time.isRunning()) {
timer.start();
}
}
详细了解How to use Swing Timers了解更多详情。
您可能希望阅读Code Conventions for the Java TM Programming Language,这样可以让人们更轻松地阅读您的代码并让您阅读其他代码
答案 1 :(得分:3)
这个想法是,当用户打开应用程序时,他会看到一张图片5秒钟,然后应用程序就会启动。
您应该使用启动画面。启动画面的优点是图像会立即显示,因为整个Swing应用程序不需要加载。
查看How to Create a Splash Screen上Swing教程中的部分,了解更多信息和工作示例。