我正在使用Netbeans 7.3 Beta 2 GUI构建器。编写Swing GUI,我试图在按下按钮后显示另一个GUI。
private void loginButtonSceneActionPerformed(java.awt.event.ActionEvent evt) {
new LoginGUI();
}
按下登录按钮后,我想显示LoginGUI,但它什么也没做,Netbeans说“新实例被忽略”。我在按钮上添加了一个system.out.println,以确保它正常工作。
这或多或少是完整的来源。我哪里错了?我想用登录GUI替换这个GUI。
package com.john.spp.view;
import java.sql.ResultSet;
import java.sql.Statement;
/**
*
* @author John
*/
public class LogRegGUI extends javax.swing.JFrame {
/**
* Creates new form LoginGUI
*/
public LogRegGUI() {
initComponents();
}
/**
* 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() {
//GUI BUILDER CODE HERE
}// </editor-fold>
private void loginButtonSceneActionPerformed(java.awt.event.ActionEvent evt) {
new LoginGUI();
}
private void registerSceneButtonActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
/**
* @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(LogRegGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(LogRegGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(LogRegGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(LogRegGUI.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 LogRegGUI().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton dataVaultButton;
private javax.swing.JButton helpButton;
private javax.swing.JEditorPane jEditorPane1;
private javax.swing.JLabel jLabel3;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel jPanel2;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JButton loginButton;
private javax.swing.JButton logoutButton;
private javax.swing.JButton registerButton;
private javax.swing.JButton settingsButton;
// End of variables declaration
}
感谢。
编辑:
通过使用此代码修复它,但它看起来非常糟糕,因为它快速闪烁并重新绘制新GUI,有关如何阻止它的任何想法?
private void loginButtonSceneActionPerformed(java.awt.event.ActionEvent evt) {
LoginGUI itemloader=new LoginGUI();
itemloader.setVisible(true);
this.setVisible(false);
}
答案 0 :(得分:2)
为什么使用多个帧不是应用程序的最佳解决方案有几个原因。好吧,它常常让用户感到困惑,正如您所看到的那样带来了一些并发症
正如我在评论中已经建议的那样,您可以在my other answer yesterday之前通过构建所有JFrame
来指导您。如果你将它们设置为可见,那么现在不会有太多的延迟,也节省了一些内存和CPU时间
另一种方法可能是只使用一个帧并改变它的内容。这个answer在引用时真的成了我的最爱;)
通过这种方式,还可以先构建,然后立即显示您已构建的内容。没有延迟,没有闪烁。