Question

I’m using a JTable and adding it to a panel which uses a gridbaglayout like so:

JTable qdbs = new JTable(rowData, columnNamesVector);
qdbs.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);

panel.add(qdbs, c);

I don’t want the table to be in a scroll pane, but I do want the table to take up the entire width of the panel. How would I accomplish this?

An SSCCE as requested:

import javax.swing.*;
import java.awt.*;

public class Main{

    public static void main(String[] args) {
    new TestFrame();
    }

    public static class TestFrame extends JFrame{
    public TestFrame() {
        this.setTitle("SSCCE");

        JPanel panel = new JPanel();
        panel.setLayout(new GridBagLayout());

        GridBagConstraints c = new GridBagConstraints();

        c.gridx = 0;
        c.gridy = 0;

        c.insets = new Insets(10,10,10,10);
        JTable testTable = new JTable(10,2);
        panel.add(testTable, c);

        this.add(panel);
        this.pack();
        this.setVisible(true);
    }
    }

}

I would like this table to always take up the entire width of the panel (except the insets). Currently the table does not change size when the frame is resized.

Answer 1

You need to add constrains to tell the layout what to do with more space. In your SSCCE add these items:

  c.fill = GridBagConstraints.BOTH;
  c.weightx = 1;
  c.weighty = 0;