newjframe.java

来自「java netbeans 学习程序合集」· Java 代码 · 共 91 行

/*
 * NewJFrame.java
 *
 * Created on 2007年10月21日, 下午8:39
 */

package org.Adam;

/**
 *
 * @author  Administrator
 */
public class NewJFrame extends javax.swing.JFrame {
    private java.lang.StringBuffer stb=new java.lang.StringBuffer();
    private java.lang.StringBuffer a=new java.lang.StringBuffer();
    
    /** Creates new form NewJFrame */
    public NewJFrame() {
        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.
     */
    // <editor-fold defaultstate="collapsed" desc=" 生成的代码 ">//GEN-BEGIN:initComponents
    private void initComponents() {
        jPasswordField1 = new javax.swing.JPasswordField();
        jLabel1 = new javax.swing.JLabel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        jPasswordField1.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyPressed(java.awt.event.KeyEvent evt) {
                jPasswordField1KeyPressed(evt);
            }
        });

        org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(layout.createSequentialGroup()
                .add(93, 93, 93)
                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING)
                    .add(org.jdesktop.layout.GroupLayout.LEADING, jLabel1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 122, Short.MAX_VALUE)
                    .add(org.jdesktop.layout.GroupLayout.LEADING, jPasswordField1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 122, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                .addContainerGap(185, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(layout.createSequentialGroup()
                .add(94, 94, 94)
                .add(jPasswordField1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .add(52, 52, 52)
                .add(jLabel1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 28, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(244, Short.MAX_VALUE))
        );
        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void jPasswordField1KeyPressed(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_jPasswordField1KeyPressed
// TODO 将在此处添加您的处理代码：
      
        stb.append(evt.getKeyChar());
        this.jLabel1.setText(stb.toString());
       if(new String(stb.append(evt.getKeyChar())).equals("a")){
            this.jLabel1.setText("");
        }
   
        System.out.print(evt.getKeyChar());
    }//GEN-LAST:event_jPasswordField1KeyPressed
    
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new NewJFrame().setVisible(true);
            }
        });
    }
    
    // 变量声明 - 不进行修改//GEN-BEGIN:variables
    private javax.swing.JLabel jLabel1;
    private javax.swing.JPasswordField jPasswordField1;
    // 变量声明结束//GEN-END:variables
    
}