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GridBagConstraints RELATIVE

import java.awt.Container; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import java.awt.Insets; import javax.swing.BorderFactory; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.border.Border; public class MainClass {   public static void main(String[] args) {     JFrame aWindow = new JFrame();     aWindow.setBounds(200, 200, 200, 200);     aWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);     Container content = aWindow.getContentPane();     content.add(new GridBagLayoutPanel());     aWindow.setVisible(true);   } } class GridBagLayoutPanel extends JPanel {   public GridBagLayoutPanel() {     GridBagLayout gridbag = new GridBagLayout();     GridBagConstraints constraints = new GridBagConstraints();     setLayout(gridbag);     constraints.weightx = constraints.weighty = 10.0;     constraints.fill = constraints.NONE;     constraints.ipadx = 30;     constraints.ipady = 10;     addButton("Press", constraints, gridbag);     constraints.weightx = 5.0;     constraints.fill = constraints.BOTH;     constraints.ipadx = constraints.ipady = 0;     constraints.insets = new Insets(10, 30, 10, 20);     constraints.gridwidth = constraints.RELATIVE;     constraints.gridheight = 2;     addButton("GO", constraints, gridbag);     constraints.insets = new Insets(0, 0, 0, 0);     constraints.gridx = 0;     constraints.fill = constraints.NONE;     constraints.ipadx = 30;     constraints.ipady = 10;     constraints.gridwidth = 1;     constraints.gridheight = 1;     addButton("Push", constraints, gridbag);   }   private void addButton(String label, GridBagConstraints constraints,       GridBagLayout layout) {     Border edge = BorderFactory.createRaisedBevelBorder();     JButton button = new JButton(label);     button.setBorder(edge);     layout.setConstraints(button, constraints);     add(button);   } }