小编use*_*994的帖子

是否有可能当我点击文本字段时,它会清除最近输入的文本？我想是这样的,假设这些是文本字段.

   Name: Last Name     First Name      Middle Initial

然后我会点击姓氏,它将被清除,与First Name和Middle Initial相同.感谢阅读,希望你能帮助我.

我是这种java语言的新手所以我仍然很难解决问题,虽然我没有错误,但仍然没有运行.帮我解决这个问题.我发布了相同的程序,虽然问题是回来我已经弄明白了.

public Connection dbConnection() throws Exception
{
    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
    String filename =
        "C:/Documents and Settings/gebs/Desktop/Database1.mdb";// fileplace
    String database =
        "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};DBQ=";// connection driver
    database += filename.trim() + ";DriverID=22;READONLY=true}";
    return DriverManager.getConnection(database, "", "");

    try
    {
        Connection con = dbConnection();

        String lname = this.jTextField1.getText();
        String fname = this.jTextField2.getText();
        String mname = this.jTextField3.getText();
        String address = this.jTextField4.getText();
        String birthday =
            (String) this.jComboBox1.getSelectedItem()
                + this.jTextField5.getText() + this.jTextField6.getText();
        String gender = (String) this.jComboBox2.getSelectedItem();
        String age = this.jTextField7.getText();
        String contactno = this.jTextField8.getText();
        String contactperson = …

我正在尝试将java连接到sql.虽然我是javam的新手但我似乎无法找出原因.

java.lang.ArrayIndexOutOfBoundsException: 2 

你能帮帮我,让我知道如何解决这个问题吗？

try{
       Connection con = dbConnection();

       String lname = this.last.getText();
       String fname = this.first.getText();
       String mname = this.mid.getText();
       String ad = this.add.getText();
       String bd = this.bday.getText();
       String ag = this.edad.getText();
       String nom = this.no.getText();
       String per = this.person.getText();

       String query = "INSERT INTO Personal Category    (Lastname,Firstname,Middle,Address,Birthday,Age,No,Person) VALUES (?,?)"; //to insert to database

       PreparedStatement pre;

       pre = con.prepareStatement(query);


       pre.setString(1, lname);
       pre.setString(2, fname);
       pre.setString(3, mname);
       pre.setString(4, ad);
       pre.setString(5, bd);
       pre.setString(6, ag);
       pre.setString(7, nom);
       pre.setString(8, per);


       pre.execute();//execute

       con.close();


    }catch (Exception …