新建jframe.java

用netbeans5.0作的个建议记事本

            }
        });

        jMenu3.add(jCheckBoxMenuItem1);

        jMenuBar1.add(jMenu3);

        jMenu4.setText("\u5e2e\u52a9");
        jMenuItem10.setText("\u5173\u4e8e\u8bb0\u4e8b\u672c...");
        jMenuItem10.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuItem10ActionPerformed(evt);
            }
        });

        jMenu4.add(jMenuItem10);

        jMenuBar1.add(jMenu4);

        setJMenuBar(jMenuBar1);

        org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(jScrollPane1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 328, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(jScrollPane1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 261, Short.MAX_VALUE)
        );
        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void jMenuItem11ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jMenuItem11ActionPerformed
// TODO 将在此处添加您的处理代码：
//颜色        
        color = JColorChooser.showDialog(about,"",color);
        jTextArea1.setForeground(color);
    }//GEN-LAST:event_jMenuItem11ActionPerformed

    private void jMenuItem9ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jMenuItem9ActionPerformed
// TODO 将在此处添加您的处理代码：
     jTextArea1.setText("");
    }//GEN-LAST:event_jMenuItem9ActionPerformed

    private void jRadioButtonMenuItem8ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jRadioButtonMenuItem8ActionPerformed
// TODO 将在此处添加您的处理代码：
        f="隶书";
        jTextArea1.setFont(new Font(f,sytle,16));
    }//GEN-LAST:event_jRadioButtonMenuItem8ActionPerformed

    private void jRadioButtonMenuItem7ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jRadioButtonMenuItem7ActionPerformed
// TODO 将在此处添加您的处理代码：
 //楷体
        f="楷体";
        jTextArea1.setFont(new Font("楷体",sytle,16));
    }//GEN-LAST:event_jRadioButtonMenuItem7ActionPerformed

    private void jMenu7ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jMenu7ActionPerformed
// TODO 将在此处添加您的处理代码：
    }//GEN-LAST:event_jMenu7ActionPerformed

    private void jRadioButtonMenuItem6ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jRadioButtonMenuItem6ActionPerformed
// TODO 将在此处添加您的处理代码：
//黑体
        f="黑体";
       jTextArea1.setFont(new Font("黑体",sytle,16)); 
      
    }//GEN-LAST:event_jRadioButtonMenuItem6ActionPerformed

    private void jRadioButtonMenuItem5ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jRadioButtonMenuItem5ActionPerformed
// TODO 将在此处添加您的处理代码：
//宋体
     f="宋体";   
     jTextArea1.setFont(new Font("宋体",sytle,16)); 
       
    }//GEN-LAST:event_jRadioButtonMenuItem5ActionPerformed

    private void jRadioButtonMenuItem4ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jRadioButtonMenuItem4ActionPerformed
// TODO 将在此处添加您的处理代码：
//粗斜体
        sytle=Font.BOLD+Font.ITALIC;
        jTextArea1.setFont(new Font(f,sytle,16));
        
    }//GEN-LAST:event_jRadioButtonMenuItem4ActionPerformed

    private void jRadioButtonMenuItem3ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jRadioButtonMenuItem3ActionPerformed
// TODO 将在此处添加您的处理代码：
//加粗
        sytle=Font.BOLD;
        jTextArea1.setFont(new Font(f,sytle,16));
    }//GEN-LAST:event_jRadioButtonMenuItem3ActionPerformed

    private void jRadioButtonMenuItem2ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jRadioButtonMenuItem2ActionPerformed
// TODO 将在此处添加您的处理代码：
//倾斜
        sytle=Font.ITALIC;
        jTextArea1.setFont(new Font(f,sytle,16));
    }//GEN-LAST:event_jRadioButtonMenuItem2ActionPerformed

    private void jRadioButtonMenuItem1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jRadioButtonMenuItem1ActionPerformed
// TODO 将在此处添加您的处理代码：
//常规字体     
        sytle=Font.PLAIN;
        jTextArea1.setFont(new Font(f,sytle,16));
           
    }//GEN-LAST:event_jRadioButtonMenuItem1ActionPerformed

    private void jMenuItem10ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jMenuItem10ActionPerformed
// TODO 将在此处添加您的处理代码：
        //static JFrame Frame;
         about.setSize(250,150);
         about.getContentPane().add(new JLabel("Java记事本设计于2006年12月29日!"));
         about.setModal(true);
         about.show();
              
    }//GEN-LAST:event_jMenuItem10ActionPerformed

    private void jCheckBoxMenuItem1MouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_jCheckBoxMenuItem1MouseClicked
// TODO 将在此处添加您的处理代码：
    }//GEN-LAST:event_jCheckBoxMenuItem1MouseClicked


    private void jCheckBoxMenuItem1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jCheckBoxMenuItem1ActionPerformed
// TODO 将在此处添加您的处理代码：
//自动换行
      
       if  (jCheckBoxMenuItem1.getState()==true)     
              jTextArea1.setLineWrap(true);
        
       else
              jTextArea1.setLineWrap(false);  
                  
    }//GEN-LAST:event_jCheckBoxMenuItem1ActionPerformed

    private void jMenuItem8ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jMenuItem8ActionPerformed
// TODO 将在此处添加您的处理代码：
//选择全部
        jTextArea1.selectAll();
        
    }//GEN-LAST:event_jMenuItem8ActionPerformed

    private void jMenuItem7ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jMenuItem7ActionPerformed
// TODO 将在此处添加您的处理代码：
//粘贴
         jTextArea1.paste();
    }//GEN-LAST:event_jMenuItem7ActionPerformed

    private void jMenuItem6ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jMenuItem6ActionPerformed
// TODO 将在此处添加您的处理代码：
//复制        
         jTextArea1.copy();
    }//GEN-LAST:event_jMenuItem6ActionPerformed

    private void jMenuItem5ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jMenuItem5ActionPerformed
// TODO 将在此处添加您的处理代码：
//剪贴        
                    jTextArea1.cut();
    }//GEN-LAST:event_jMenuItem5ActionPerformed

    private void jMenuItem4ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jMenuItem4ActionPerformed
// TODO 将在此处添加您的处理代码：
//退出        
              System.exit(0);
    }//GEN-LAST:event_jMenuItem4ActionPerformed

    private void jMenuItem3ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jMenuItem3ActionPerformed
// TODO 将在此处添加您的处理代码：
//保存        
                if(file != null)
                  filechooser.setSelectedFile(file);

                int returnVal = filechooser.showSaveDialog(about);

                if(returnVal == JFileChooser.APPROVE_OPTION){
                     file = filechooser.getSelectedFile();
                     saveFile();
                }
    }//GEN-LAST:event_jMenuItem3ActionPerformed

    private void jMenuItem2ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jMenuItem2ActionPerformed
// TODO 将在此处添加您的处理代码：
//打开        
          if(file != null)
                  filechooser.setSelectedFile(file);

                int returnVal = filechooser.showOpenDialog(about);

                if(returnVal == JFileChooser.APPROVE_OPTION){
                    file = filechooser.getSelectedFile();
                    openFile();
                }
    }//GEN-LAST:event_jMenuItem2ActionPerformed

    private void jMenuItem1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jMenuItem1ActionPerformed
// TODO 将在此处添加您的处理代码：
//新建        
                Date date=new Date();
                jTextArea1.setText(date.toString());
                file = null;
    }//GEN-LAST:event_jMenuItem1ActionPerformed
    
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new 新建JFrame().setVisible(true);
            }
        });
      }
    

    
 //SaveFile方法
    void saveFile()
    {
        try{
            FileWriter fw = new FileWriter(file);
            fw.write(jTextArea1.getText());
            fw.close();
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }
  
//OpenFile方法
    void openFile()
    {
        try{
            FileReader fr = new FileReader(file);
            int len = (int) file.length();
            char [] buffer = new char[len];
            fr.read(buffer,0,len);
            fr.close();
            jTextArea1.setText(new String(buffer));
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }
    // 变量声明 - 不进行修改//GEN-BEGIN:variables
    private javax.swing.ButtonGroup buttonGroup1;
    private javax.swing.JCheckBoxMenuItem jCheckBoxMenuItem1;
    private javax.swing.JMenu jMenu1;
    private javax.swing.JMenu jMenu2;
    private javax.swing.JMenu jMenu3;
    private javax.swing.JMenu jMenu4;
    private javax.swing.JMenu jMenu5;
    private javax.swing.JMenu jMenu6;
    private javax.swing.JMenu jMenu7;
    private javax.swing.JMenuBar jMenuBar1;
    private javax.swing.JMenuItem jMenuItem1;
    private javax.swing.JMenuItem jMenuItem10;
    private javax.swing.JMenuItem jMenuItem11;
    private javax.swing.JMenuItem jMenuItem2;
    private javax.swing.JMenuItem jMenuItem3;
    private javax.swing.JMenuItem jMenuItem4;
    private javax.swing.JMenuItem jMenuItem5;
    private javax.swing.JMenuItem jMenuItem6;
    private javax.swing.JMenuItem jMenuItem7;
    private javax.swing.JMenuItem jMenuItem8;
    private javax.swing.JMenuItem jMenuItem9;
    private javax.swing.JRadioButtonMenuItem jRadioButtonMenuItem1;
    private javax.swing.JRadioButtonMenuItem jRadioButtonMenuItem2;
    private javax.swing.JRadioButtonMenuItem jRadioButtonMenuItem3;
    private javax.swing.JRadioButtonMenuItem jRadioButtonMenuItem4;
    private javax.swing.JRadioButtonMenuItem jRadioButtonMenuItem5;
    private javax.swing.JRadioButtonMenuItem jRadioButtonMenuItem6;
    private javax.swing.JRadioButtonMenuItem jRadioButtonMenuItem7;
    private javax.swing.JRadioButtonMenuItem jRadioButtonMenuItem8;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextArea jTextArea1;
    // 变量声明结束//GEN-END:variables
    
}