[solved]GridLayout problem

[L Willie]

how to group JRadioButton in a 'box'

    
import javax.swing.*;
 
 
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
public class keyStoreGUI extends JFrame{
private JLabel alias;
private JLabel keyalg;
private JLabel keysize;
private JLabel keystore;
private JLabel validity;

private JTextField jtf_alias;
private JRadioButton jrb_DSA,jrb_RSA;
private JTextField jtf_keysize;
private JTextField jtf_keystore;
private JTextField jtf_validity;

public void genkey(){
setTitle("KeyStore GUI");
setLayout(new GridLayout(5, 2));
setBounds(30, 30, 300, 300);
setSize(300, 200);
setVisible(true);
setResizable(false);

alias = new JLabel("Alias:", SwingConstants.LEFT);
keyalg = new JLabel("Key Algorithm:", SwingConstants.LEFT);
keysize = new JLabel("Key Size:", SwingConstants.LEFT);
keystore = new JLabel("Key Store:", SwingConstants.LEFT);
validity = new JLabel("Validity:", SwingConstants.LEFT);

jtf_alias = new JTextField("alias");
jrb_DSA = new JRadioButton("DSA");
jrb_RSA = new JRadioButton("RSA");
ButtonGroup group = new ButtonGroup();
group.add(jrb_DSA);
group.add(jrb_RSA);
jtf_keysize = new JTextField("keysize");
jtf_keystore = new JTextField("keystore");
jtf_validity = new JTextField("validity");

add(alias);
add(jtf_alias);
add(keyalg);
add(jrb_DSA);
add(jrb_RSA);
add(keysize);
add(jtf_keysize);
add(keystore);
add(jtf_keystore);
add(validity);
add(jtf_validity);

pack();


}
public static void main(String []args){
keyStoreGUI window = new keyStoreGUI(); 
window.genkey();
    window.setBounds(30, 30, 300, 300);
}
}

i want the looks in following arrangement
[alias |jtf_alias ]
[keyalg |jrb_DSA + jrb_RSA]
[keysize |jtf_keysize ]
[keystore |jtf_keystore ]
[validity |jtf_validity ]
[ October 12, 2008: Message edited by: L Willie ]

[Campbell Ritchie]

GridLayout is usually easy to use, only the Components all seem to come out the same size.

For 5 rows, 2 columns,

Add a label then a button, that's the 1st row.
Add a label then a button, that's the 2nd row.
Add a label then a button, that's the 3rd row, etc.

Whenever I have used GridLayout I didn't bother with Constraints or anything. Just the GridLayout.

[L Willie]

please try to run my program,then you'll understand my problem.
i thought a solution,that is use blank JLabel to fill up 3rd column for each rows and cheat GridLayout,but i think this is not a standard method.

[pete stein]

put the radiobuttons into their own jpanel, then add that jpanel into the main jpanel like so:

  public void genkey()
  {
    setTitle("KeyStore GUI");
    setLayout(new GridLayout(0, 2));
    setBounds(30, 30, 300, 300);
    //......
    add(keyalg);
    JPanel radioPanel = new JPanel(new GridLayout(1, 0));
    radioPanel.add(jrb_DSA);
    radioPanel.add(jrb_RSA);
    add(radioPanel);

[L Willie]

thank a lot to pete stein.
thank to JavaRanch because of help me solve lot of java problem that i face so far.