javaswinglayout-managergrouplayout

GroupLayout - simple component positioning

I have been using GridBagLayout but turned to GroupLayout recently. Below is a screen shot of what I have and what I need. Then the code.

What do I need to change?

What I have

enter image description here

What I need

enter image description here

I think i am supposed to be using the TRAILING and LEADING constants but the GUI is not responding. Could this be the reason most SO advise to people is to avoid GroupLayout? I have been using GridBagLayout before, which is more complex, and GroupLayout code seems much simpler. That's why am using it. Code that I have is given below, what do I need, to have the desired effect?

public class GroupLayoutOne extends JFrame{

   JLabel lbText = new JLabel("Text one");
   JTextField txText = new JTextField();
   JLabel lbText2 = new JLabel("Text two");
   JTextField txText2 = new JTextField();
   JPanel pnCompo = new JPanel();

    public static void main(String[] args) {
    
        GroupLayoutOne glx = new GroupLayoutOne();
        glx.init();
        glx.setVisible(true);
        glx.setSize(new Dimension(400,200));
        glx.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

    void init(){
        GroupLayout gl = new GroupLayout(getContentPane());
        this.getContentPane().setLayout(gl);
    
        pnCompo.setPreferredSize(new Dimension(300,300));
        pnCompo.setBorder(BorderFactory.createTitledBorder("More Components"));
        gl.setHorizontalGroup(gl.createSequentialGroup()
                .addGroup(gl.createParallelGroup()
                        .addComponent(lbText)
                        .addComponent(lbText2)
                        .addComponent(pnCompo)
                 )
                 .addGroup(gl.createParallelGroup()
                        .addComponent(txText)
                        .addComponent(txText2)
    
                )
        );
        gl.setVerticalGroup(gl.createSequentialGroup()
                 .addGroup(gl.createParallelGroup()
                        .addComponent(lbText)
                        .addComponent(txText)
                   
                 )
                 .addGroup(gl.createParallelGroup()
                        .addComponent(lbText2)
                        .addComponent(txText2)
                   
                )
                .addComponent(pnCompo)
        );
        pack();
    }
 }
Solution

  • Replace your init method with the below code: BTW: Use NetBeans or Eclipse to draw swing UI. It would be much easier than writing code yourself.

        GroupLayout gl = new GroupLayout(getContentPane());
    this.getContentPane().setLayout(gl);

    pnCompo.setPreferredSize(new Dimension(300,300));
    pnCompo.setBorder(BorderFactory.createTitledBorder("More Components"));
    gl.setHorizontalGroup(gl.createSequentialGroup()
            .addGroup(gl.createParallelGroup()
                    .addGroup(gl.createSequentialGroup().addComponent(lbText)
                    .addComponent(txText))

             .addGroup(gl.createParallelGroup()
                     .addGroup(gl.createSequentialGroup().addComponent(lbText2)
                    .addComponent(txText2))

             .addComponent(pnCompo))
             )
    );
    gl.setVerticalGroup(gl.createSequentialGroup()
             .addGroup(gl.createParallelGroup()
                    .addComponent(lbText)
                    .addComponent(txText))
             .addGroup(gl.createParallelGroup().addComponent(lbText2)
                    .addComponent(txText2)
            )
            .addComponent(pnCompo)
    );
    pack();