java JPanel的工作方式与它的设计预览不一样
我使用NetBeans面板表单创建了一个JPanel，并将其添加到我在另一个文件中创建的JFrame中，方法是：
startWindow.add(new BBWWindow());
BBWWindow面板有一个文本字段和一个密码字段，在面板窗体设计预览中可以正常工作，但是当我运行文件时，文本字段和密码字段不能正常工作。我可以编辑字段中的文本，但一秒钟后，它们会出现故障并返回到默认文本，或者不居中对齐，并在花一段时间加载用户的所有输入后超出字段边界
这是我的主要代码：
import java.awt.*;
import javax.swing.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class fishpond {
public static void main(String ags[]){
startFace();
//instruction();
//instruction not written yet
}
public static void startFace(){
final JFrame startWindow=new JFrame("fishpond.beta");
startWindow.getContentPane().setBackground(Color.BLACK);
startWindow.setPreferredSize(new Dimension(753,463));
startWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
String title="fishpond.beta"+"<br>"+
"school project"+"<br>"+
" "+"<br>"+
"2014-2015";
final JLabel gameTitle;
gameTitle = new JLabel("<html><div style=\"text-align:center;\">"+title+"</html>", SwingConstants.CENTER);
gameTitle.setForeground(Color.GREEN);
startWindow.getContentPane().add(gameTitle);
startWindow.setLocationRelativeTo(null);
startWindow.pack();
startWindow.setVisible(true);
Timer t;
t = new Timer(3000, new ActionListener(){
@Override
public void actionPerformed(ActionEvent e){
gameTitle.setText(null);
}
});
t.start();
startWindow.add(new BBWWindow());
}
这是面板格式代码：
public class BBWWindow extends javax.swing.JPanel {
/**
* Creates new form BBWWin
*/
public BBWWindow() {
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() {
jLabel2 = new javax.swing.JLabel();
jLabel1 = new javax.swing.JLabel();
jButton1 = new javax.swing.JButton();
jPasswordField1 = new javax.swing.JPasswordField();
jTextField1 = new javax.swing.JTextField();
jLabel3 = new javax.swing.JLabel();
jLabel4 = new javax.swing.JLabel();
jLabel5 = new javax.swing.JLabel();
jButton2 = new javax.swing.JButton();
jTextField2 = new javax.swing.JTextField();
jLabel6 = new javax.swing.JLabel();
jPasswordField2 = new javax.swing.JPasswordField();
jLabel2.setFont(new java.awt.Font("Minecraftia", 0, 13)); // NOI18N
jLabel2.setForeground(new java.awt.Color(0, 255, 0));
jLabel2.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
jLabel2.setText("school project 2014-2015");
jLabel2.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
jLabel1.setFont(new java.awt.Font("Minecraftia", 0, 13)); // NOI18N
jLabel1.setForeground(new java.awt.Color(0, 255, 0));
jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
jLabel1.setText("fishpond.beta");
jLabel1.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
jButton1.setBackground(new java.awt.Color(0, 0, 0));
jButton1.setForeground(new java.awt.Color(0, 255, 0));
jButton1.setText("LOG IN");
jButton1.setBorder(javax.swing.BorderFactory.createEmptyBorder(1, 1, 1, 1));
jPasswordField1.setBackground(new java.awt.Color(0, 0, 0));
jPasswordField1.setForeground(new java.awt.Color(0, 255, 0));
jPasswordField1.setText("jPasswordField1");
jPasswordField1.setBorder(javax.swing.BorderFactory.createEmptyBorder(1, 1, 1, 1));
jTextField1.setBackground(new java.awt.Color(0, 0, 0));
jTextField1.setFont(new java.awt.Font("Minecraftia", 0, 10)); // NOI18N
jTextField1.setForeground(new java.awt.Color(0, 255, 0));
jTextField1.setText("USERNAME");
jTextField1.setBorder(javax.swing.BorderFactory.createEmptyBorder(1, 1, 1, 1));
jTextField1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField1ActionPerformed(evt);
}
});
jLabel3.setFont(new java.awt.Font("Minecraftia", 0, 8)); // NOI18N
jLabel3.setForeground(new java.awt.Color(0, 255, 0));
jLabel3.setText("default root user password is 'toor'");
setBackground(new java.awt.Color(0, 0, 0));
setForeground(new java.awt.Color(0, 255, 0));
setFont(new java.awt.Font("Minecraftia", 0, 12)); // NOI18N
setPreferredSize(new java.awt.Dimension(753, 463));
setSize(new java.awt.Dimension(753, 463));
jLabel4.setFont(new java.awt.Font("Minecraftia", 0, 13)); // NOI18N
jLabel4.setForeground(new java.awt.Color(0, 255, 0));
jLabel4.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
jLabel4.setText("school project 2014-2015");
jLabel4.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
jLabel5.setFont(new java.awt.Font("Minecraftia", 0, 13)); // NOI18N
jLabel5.setForeground(new java.awt.Color(0, 255, 0));
jLabel5.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
jLabel5.setText("fishpond.beta");
jLabel5.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
jButton2.setBackground(new java.awt.Color(0, 0, 0));
jButton2.setForeground(new java.awt.Color(0, 255, 0));
jButton2.setText("LOG IN");
jButton2.setBorder(javax.swing.BorderFactory.createEmptyBorder(1, 1, 1, 1));
jButton2.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
jButton2MouseClicked(evt);
}
});
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(evt);
}
});
jTextField2.setBackground(new java.awt.Color(0, 0, 0));
jTextField2.setFont(new java.awt.Font("Minecraftia", 0, 10)); // NOI18N
jTextField2.setForeground(new java.awt.Color(0, 255, 0));
jTextField2.setHorizontalAlignment(javax.swing.JTextField.CENTER);
jTextField2.setText("USERNAME");
jTextField2.setBorder(javax.swing.BorderFactory.createEmptyBorder(1, 1, 1, 1));
jTextField2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField2ActionPerformed(evt);
}
});
jLabel6.setFont(new java.awt.Font("Minecraftia", 0, 8)); // NOI18N
jLabel6.setForeground(new java.awt.Color(0, 255, 0));
jLabel6.setText("default root user password is 'toor'");
jPasswordField2.setBackground(new java.awt.Color(0, 0, 0));
jPasswordField2.setForeground(new java.awt.Color(0, 255, 0));
jPasswordField2.setHorizontalAlignment(javax.swing.JTextField.CENTER);
jPasswordField2.setText("jPasswordField1");
jPasswordField2.setBorder(javax.swing.BorderFactory.createEmptyBorder(1, 1, 1, 1));
jPasswordField2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jPasswordField2ActionPerformed(evt);
}
});
org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(this);
this.setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
.add(0, 0, Short.MAX_VALUE)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
.add(jLabel5)
.add(298, 298, 298))
.add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
.add(jTextField2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.add(339, 339, 339))))
.add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
.addContainerGap(208, Short.MAX_VALUE)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
.add(jLabel6)
.add(276, 276, 276))
.add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
.add(jLabel4)
.add(196, 196, 196))
.add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
.add(jButton2)
.add(348, 348, 348))
.add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
.add(jPasswordField2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.add(310, 310, 310))))
);
layout.setVerticalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
.addContainerGap(159, Short.MAX_VALUE)
.add(jLabel5)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(jLabel4)
.add(24, 24, 24)
.add(jLabel6)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(jTextField2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(jPasswordField2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.add(18, 18, 18)
.add(jButton2)
.add(136, 136, 136))
);
}// </editor-fold>
private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void jTextField2ActionPerformed(java.awt.event.ActionEvent evt) {
jTextField2.setEditable(true);
}
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void jButton2MouseClicked(java.awt.event.MouseEvent evt) {
//change the button here!
}
private void jPasswordField2ActionPerformed(java.awt.event.ActionEvent evt) {
jPasswordField2.setEditable(true);
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JLabel jLabel4;
private javax.swing.JLabel jLabel5;
private javax.swing.JLabel jLabel6;
private javax.swing.JPasswordField jPasswordField1;
private javax.swing.JPasswordField jPasswordField2;
private javax.swing.JTextField jTextField1;
private javax.swing.JTextField jTextField2;
// End of variables declaration
}
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