How do I run SQL statements with my GUI ?

Question

Hello,
i created a simple GUI with a status text box on top and a text box on the bottom to type in sql commands. Can somebody help me modify my code so that I can at least run a create table command and give the status of "successful create table" in the top text box?
One other question I have is that I already have a login screen gui that creates the sql connection and that gui calls this gui. Do I have to pass this connection to this new class or not? and if so, how do i do it? thanks again!
import java.awt.*;
import java.awt.event.*;
import javax.swing.JFrame;
import javax.swing.*;
import java.sql.*;
public class SqlGui extends JFrame {
        public SqlGui() {
                super("Oracle SQL Application");
                setDefaultCloseOperation(EXIT_ON_CLOSE);
                JTextArea outputArea = new JTextArea("output here",20, 0);
                outputArea.setLineWrap(true);
                JScrollPane scrollOutputArea = new JScrollPane(outputArea);
                JTextArea inputArea =
                        new JTextArea("enter commands here",2, 20);
                inputArea.setLineWrap(true);
                JScrollPane scrollInputArea = new JScrollPane(inputArea);
                JPanel buttonPanel = new JPanel();
                JButton executeButton = new JButton("Execute Command");
                buttonPanel.add(executeButton);
                // do work here?
                JButton exitButton = new JButton("Exit");
                exitButton.addActionListener(new ActionListener() {
                                                     public void actionPerformed(
                                                             ActionEvent ae) {
                                                             dispose();
                buttonPanel.add(exitButton);
                JPanel sqlPanel = new JPanel(new BorderLayout());
                sqlPanel.add(scrollInputArea);
                sqlPanel.add(buttonPanel, BorderLayout.SOUTH);
                JSplitPane mainsplit =
                        new JSplitPane(JSplitPane.VERTICAL_SPLIT,
                        scrollOutputArea, sqlPanel);
                getContentPane().add(mainsplit);
                setSize(800, 500);
                setLocationRelativeTo(null);
                setVisible(true);
}

Answer 1

Hello,
There are two ways to execute the SQL command in GUI , one by passing the connection object from other scree as specified by you is logic screen (write a constructor which takes connection parameter as input) else create the connection in this present GUI screen also as shown by me.
import java.awt.*;
import java.awt.event.*;
import javax.swing.JFrame;
import javax.swing.*;
import java.sql.*;
public class SqlGui extends JFrame implements ActionListener{
     String url; // url providing the database details
     Connection connect;
     JTextArea inputArea;
     JButton executeButton;
     JTextArea outputArea;
     public SqlGui() {
          super("Oracle SQL Application");
          setDefaultCloseOperation(EXIT_ON_CLOSE);
          try
                    url = "jdbc:odbc:dsnName";
                    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
                              // url , userid, pwd of database like scott,tiger
                    connect = DriverManager.getConnection(url,"userid",
                                                                           "password");
                    System.out.println("Connection Sucessful \n") ;
               catch (ClassNotFoundException cnfex)
                    cnfex.printStackTrace();
                    System.out.println("Connection Failed " + cnfex.toString());
               catch (SQLException exp)
                    System.out.println(exp);
          outputArea = new JTextArea("output here",20, 0);
          outputArea.setLineWrap(true);
          JScrollPane scrollOutputArea = new JScrollPane(outputArea);
          inputArea = new JTextArea("enter commands here",2, 20);
          inputArea.setLineWrap(true);
          JScrollPane scrollInputArea = new JScrollPane(inputArea);
          JPanel buttonPanel = new JPanel();
          executeButton = new JButton("Execute Command");
          executeButton.addActionListener(this);
          buttonPanel.add(executeButton); // do work here?
          JButton exitButton = new JButton("Exit");
          exitButton.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent ae) {
                    dispose();
          buttonPanel.add(exitButton);
          JPanel sqlPanel = new JPanel(new BorderLayout());
          sqlPanel.add(scrollInputArea);
          sqlPanel.add(buttonPanel, BorderLayout.SOUTH);
          JSplitPane mainsplit = new JSplitPane(JSplitPane.VERTICAL_SPLIT, scrollOutputArea, sqlPanel); getContentPane().add(mainsplit);
          setSize(800, 500);
          setLocationRelativeTo(null);
          setVisible(true);
     public void actionPerformed(ActionEvent ae)     {
               if (ae.getSource() == executeButton) {
                                             // To clear the fields
                    create(inputArea.getText());
     public static void main(String args[]) {
     SqlGui app = new SqlGui();
     public void create(String SQLCommand) {
               String query = SQLCommand;
               outputArea.setText("The Result of Executing the query" + query );
               try{
               Statement st = connect.createStatement();
               st.executeQuery(query);
               JOptionPane.showMessageDialog(null,"Command Executed Sucessfully");
               catch (SQLException sqlex) {
                    System.err.println("Unable to Execute Command :");
                    outputArea.setText("Unable to Execute Command :" +query);
                    sqlex.printStackTrace();
Hope this sucessfully works for you.