How can I display data into my Jtextarea from my data base Mysql - mysql

Question

I have problem when I try to display data(the result of a query) from my database mysql to my jTextarea, when I compile I have an error exception like:
SQL Exception: java.sql.SQLException: Can not issue SELECT via executeUpdate()
I have used a "select" query from my table where the name is the name written in my jTextFieldNom,this is my code, I hope that some one help me because I don't know how to resolve the problem, I 'm sure that my query is correct but I don't know where is the problem.
String pilote = "com.mysql.jdbc.Driver";
jComboBoxType.addItemListener(new ItemState());
jComboBoxMenaces.addItemListener(new ItemState());
try {
Class.forName(pilote);
Connection connexion = DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root"," ");
Statement instruction = connexion.createStatement();
String a=jTextFieldNom.getText();
String SQL = "select description from table where nomcol="+a+";";
ResultSet rs = instruction.executeQuery(SQL);
instruction = connexion.createStatement();
int rowsEffected = instruction.executeUpdate(SQL);
jTextArea1.append(rs.getString("description"));
}
...... //bloc catch

Answer 1

This line is executing a Select statement which is throwing the error.
int rowsEffected = instruction.executeUpdate(SQL);
You don't need this line because you aren't updating your database.
Also change the append to setText
jTextArea1.setText(rs.getString("description"));
Try this:
String pilote = "com.mysql.jdbc.Driver";
jComboBoxType.addItemListener(new ItemState());
jComboBoxMenaces.addItemListener(new ItemState());
try {
Class.forName(pilote);
Connection connexion = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/test","root"," ");
Statement instruction = connexion.createStatement();
String a=jTextFieldNom.getText();
String SQL = "select description from table where nomcol="+a+";";
ResultSet rs = instruction.executeQuery(SQL);
jTextArea1.setText(rs.getString("description"));
}