import java.awt.*;import java.awt.event.*;import javax.swing.*;import java.sql.*;public class NoteTextArea extends JFrame implements ActionListenerprivate JPanel jp=new JPanel();private JButton jb = new JButton4;private JComboBox box;private JTextArea jt=new JTextArea();private JScrollPane js=new JScrollPane(jt,ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);private String obj;private JTextField text = new JTextField();public NoteTextArea()jp.setLayout(null);String obj = new String微笑,生氣,難過,得意;box = new JComboBox(obj);JLabel j1 = new JLabel(留言版);JLabel j2 = new JLabel(你);JLabel j3 = new JLabel(地說：);jb0 = new JButton(清屏);jb1 = new JButton(至頂);jb2 = new JButton(至尾);jb3 = new JButton(提交);for(int i = 0;i 3;i+)jbi.setBounds(650,i*75+55,100,50);for(int i = 0;i 3;i+)jp.add(jbi);j1.setBounds(280,10,50,30);j2.setBounds(20,375,30,50);box.setBounds(55,385,80,30);j3.setBounds(160,375,40,50);text.setBounds(210,385,300,30);jb3.setBounds(520,365,75,50);js.setBounds(10,50,600,300);jp.add(j1);jp.add(j2);jp.add(j3);jp.add(box);jp.add(text);jp.add(jb3);jp.add(js);for(int i=0;i=3;i+)jbi.addActionListener(this);jt.setEditable(false);jt.setLineWrap(true);jt.setText(留言內(nèi)容：);this.add(jp);this.setTitle(留言版程序);this.setBounds(100,100,800,500);this.setVisible(true);this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);public void actionPerformed(ActionEvent e)if(e.getSource() = jb0)jt.setText();jt.setText(留言內(nèi)容：);else if(e.getSource() = jb1) jt.setCaretPosition(0);else if(e.getSource() = jb2) jt.selectAll();else if(e.getSource() = jb3)String jt1 = n你 + box.getItemAt(box.getSelectedIndex() + 地說： + text.getText();jt.append(jt1);tryClass.forName(sun.jdbc.odbc.JdbcOdbcDriver); String dbURL =jdbc:odbc:driver=Microsoft Access Driver (*.mdb);DBQ=D:DB1.mdb;System.out.println(數(shù)據(jù)庫(kù)連接成功！);Connection conn=DriverManager.getConnection(dbURL);Statement stmt=conn.createStatement();stmt.executeUpdate(insert into test1 values(+jt1+);System.out.println(添加記錄:+ jt1 +t成功！); stmt.close(); conn.close(); catch(Exception e1) System.out.println(添加到數(shù)據(jù)庫(kù)出錯(cuò)); jt.setCaretPosition(jt