gridbaglayout

import java.awt.*;

import javax.swing.JButton;

import javax.swing.JComboBox;

import javax.swing.JFrame;

import javax.swing.JTextField;

public class GridBagLayoutDemo {

    public static void addComponentsToPane(Container pane) {

        JButton jbnButton;

        pane.setLayout(new GridBagLayout());

        GridBagConstraints gBC = new GridBagConstraints();

        gBC.fill = GridBagConstraints.HORIZONTAL;

        jbnButton = new JButton("Button 1");

        gBC.weightx = 0.5;

        gBC.gridx = 0;

        gBC.gridy = 0;

        pane.add(jbnButton, gBC);

        JTextField jtf = new JTextField("TextField 1");

        gBC.gridx = 2;

        gBC.gridy = 0;

        jtf.setEditable(false);

        pane.add(jtf, gBC);

        jbnButton = new JButton("Button 3");

        gBC.gridx = 2;

        gBC.gridy = 0;

        pane.add(jbnButton, gBC);

        jbnButton = new JButton("Button 4");

<font size=-1>

        gBC.ipady = 40;     //This component has more breadth compared to other buttons

        gBC.weightx = 0.0;

        gBC.gridwidth = 3;

        gBC.gridx = 0;

        gBC.gridy = 1;

        pane.add(jbnButton, gBC);

        JComboBox jcmbSample = new JComboBox(new String[]{"ComboBox 1", "hi", "hello"});

        gBC.ipady = 0;

        gBC.weighty = 1.0;

        gBC.anchor = GridBagConstraints.PAGE_END;

        gBC.insets = new Insets(10,0,0,0);  //Padding

        gBC.gridx = 1;

        gBC.gridwidth = 2;

        gBC.gridy = 2;

        pane.add(jcmbSample, gBC);

    }

    private static void createAndShowGUI() {

        JFrame.setDefaultLookAndFeelDecorated(true);

        JFrame frame = new JFrame("GridBagLayout Source Demo");

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //Set up the content pane.

        addComponentsToPane(frame.getContentPane());

        frame.pack();

        frame.setVisible(true);

    }

    public static void main(String[] args) {

        javax.swing.SwingUtilities.invokeLater(new Runnable() {

            public void run() {

                createAndShowGUI();

            }

        });

    }

}

http://www.javabeginner.com/java-swing/java-gridbaglayout-class-example