发生错误：ORA-00911：无效字符

Question

我必须将数据插入数据库表traindata，但是当我插入数据并通过提交按钮提交时会发生此错误

ORA-00911:invalid character

我可以将我的编码发送到数据表的连接处。

private void subActionPerformed(java.awt.event.ActionEvent evt) {                                    
       try {
            Class.forName("oracle.jdbc.driver.OracleDriver");
            Connection con = DriverManager.getConnection("jdbc:oracle:thin:@ASUS-SUMIT:1521:XE", "system", "pass");
           PreparedStatement ps= con.prepareStatement("insert into traindata values(?);");
                ps.setString(1, tno.getText());
                ps.setString(1, from.getText());
                  ps.setString(1, to.getText());
                  ps.executeUpdate();
                  System.out.println("Data inserted");
                  con.close();
                  ps.close();


       reset();


      JOptionPane.showMessageDialog(this,"Data Insert Successfully!");



     }
     catch(Exception e)
     {
         JOptionPane.showMessageDialog(null, e.getMessage() ,"Error", 1);

     }    
    }