Getting the Number of Rows and Columns of Cells in a GridBagLayout

  

import java.awt.Container;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;

import javax.swing.JButton;
import javax.swing.JFrame;

public class Main {
  public static void main(String[] argv) throws Exception {
    JFrame frame = new JFrame();
    Container container = frame.getContentPane();

    GridBagLayout gbl = new GridBagLayout();

    container.setLayout(gbl);

    GridBagConstraints gbc = new GridBagConstraints();
    JButton component1 = new JButton("a");
    JButton component2 = new JButton("b");

    gbc.gridx = 1;
    gbc.gridy = 1;
    gbl.setConstraints(component1, gbc);
    container.add(component1);

    gbc.gridx = 0;
    gbc.gridy = 0;
    gbl.setConstraints(component2, gbc);
    container.add(component2);

    container.add(component1);
    container.add(component2);
    frame.pack();
    frame.setVisible(true);

    gbl.layoutContainer(container);

    int[][] dim = gbl.getLayoutDimensions();
    int cols = dim[0].length;
    int rows = dim[1].length;

    System.out.println(cols);
    System.out.println(rows);
  }
}

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Getting the Number of Rows and Columns of Cells in a GridBagLayout : GridBagLayout « Swing JFC « Java

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