Focussing a TextField

Hi,

I've written an AWT Frame with text fields and buttons. On pressing the "Clear" button, I want the text fields to be cleared and the cursor should return to the first text field. I've done clearing the text fields. But how do I return the cursor to the first text field?

Here is my code so far:

/*
 * Created on Feb 17, 2007
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
 
/**
 * @author Babu_Rajendran
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
import java.awt.Panel;
import java.awt.Label;
import java.awt.TextField;
import java.awt.Button;
import java.awt.Frame;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.Font;
import java.awt.event.WindowListener;
import java.awt.event.WindowEvent;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JOptionPane;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.DriverManager;
import java.sql.SQLException;
 
class EmployeeDetails extends Frame implements WindowListener, ActionListener {

Panel panel1;
Panel panel2;
Panel panel3;
Label label1;
Label label2;
Label label3;
TextField tf1;
TextField tf2;
Button button1;
Button button2;

EmployeeDetails(String s) {
super(s);
Color periwinkle = new Color(153,153,255);
setLayout(new FlowLayout(FlowLayout.CENTER,320,90));
setBackground(periwinkle);
setSize(500,500);
addWindowListener(this);

panel1 = new Panel();
label1 = new Label("Enter the employee details",Label.CENTER);
label1.setFont(new Font("TimesNewRoman",Font.BOLD,30));

panel1.add(label1);

panel2 = new Panel();
panel2.setLayout(new GridLayout(2,2,10,30));
label2 = new Label("Name",Label.RIGHT);
tf1 = new TextField();
label3 = new Label("Age",Label.RIGHT);
tf2 = new TextField();

panel2.add(label2);
panel2.add(tf1);
panel2.add(label3);
panel2.add(tf2);

panel3 = new Panel();
panel3.setLayout(new GridLayout(1,2,30,0));
button1 = new Button("Submit");
button2 = new Button("Clear");
button1.addActionListener(this);
button2.addActionListener(this);
panel3.add(button1);
panel3.add(button2);

this.add(panel1);
this.add(panel2);
this.add(panel3);

setVisible(true);
}

public static void main(String[] args) {
EmployeeDetails emp = new EmployeeDetails("Employee Details Entry");
}

public int validData(String a, String b) {
if ((a.equals("")) || (b.equals(""))) {
return 1;
} 
else
return 0;
}

public void insertData(String p, String q) {
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@10.122.130.36:1521:Tapti","taNOV061LC143","infy");
PreparedStatement ps = conn.prepareStatement("INSERT INTO EMPLOYEE VALUES(seq_empid.nextval,?,?)");
ps.setString(1,p);
ps.setInt(2,Integer.parseInt(q));
int flag = ps.executeUpdate();
if (flag == 0) {
JOptionPane.showMessageDialog(null,"Insertion failed!","alert",JOptionPane.ERROR_MESSAGE);
}
else {
JOptionPane.showMessageDialog(null,"Insertion successful!","alert",JOptionPane.INFORMATION_MESSAGE);
System.exit(0);
}
}
catch(SQLException sqle) {
sqle.printStackTrace();
}
catch(NumberFormatException nfe) {
JOptionPane.showMessageDialog(null,"Age should be in numbers!","alert",JOptionPane.ERROR_MESSAGE);
}
catch(Exception e) {
e.printStackTrace();
}
}

public void actionPerformed(ActionEvent ae) {
String str = (String) ae.getActionCommand();
if (str.equals("Submit")) {
int flag = validData(tf1.getText(),tf2.getText());
if(flag==1) {
JOptionPane.showMessageDialog(null,"All fields are mandatory!","alert",JOptionPane.ERROR_MESSAGE);
}
else {
insertData(tf1.getText(),tf2.getText());
}

} else if (str.equals("Clear")) {
tf1.setText("");
tf2.setText("");
}
}

public void windowClosed(WindowEvent wevent) {}
public void windowDeiconified(WindowEvent wevent) {}
public void windowIconified(WindowEvent wevent) {}
public void windowActivated(WindowEvent wevent) {}
public void windowDeactivated(WindowEvent wevent) {}
public void windowOpened(WindowEvent wevent) {}
 
public void windowClosing(WindowEvent wevent) {
System.exit(0);
}
}

Thanks & Regards,
Babu Rajendran
[ February 18, 2007: Message edited by: Babu Rajendran ]

Morning . . .

Please use the "code" button before sumbitting code; it makes it easier to read.

I tried it and as you say the fields cleared.
Not sure about the cursor going back to field 1, but try requesting the focus to the TextField. Go through the TextField API and you should find a suitable method, requestFocus().

CR

Hi Campbell,

Thanks a lot! As you've mentioned, I found the requestFocus() method in the Component class. I'm now able to bring the cursor back to the textfield.

Thanks,
Babu

Only too pleased to help . . .