Fitting a JTable Inside a Panel

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(Stri开发者_运维百科ng[] 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.

---

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;

---

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

public class Test
{
    public static void main(String args[]) throws Exception
    {
        JPanel panel = new JPanel( new GridBagLayout() );
        JTable table = new JTable(5, 5);
        GridBagConstraints gbc = new GridBagConstraints();
        gbc.weightx = 1.0;
        gbc.fill = GridBagConstraints.HORIZONTAL;
        panel.add(table, gbc);

        JFrame frame = new JFrame();
        frame.add(panel, BorderLayout.CENTER);
        frame.pack();
        frame.setVisible(true);
    }
}

If you need more help post a SSCCE that demonstrates the problem.

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c is a GridBagConstraint or something along those lines, I imagine? The very simplest thing to do would be to set the LayoutManager of the JPanel to a BorderLayout, then just add with the constraint BorderLayout.CENTER .

---

hmmm

Alex Bliskovsky wrote panel.add(qdbs, c);

that's wrong, not, never do that, you are forgot wrap you JTable to the ScrollPane and then you can play with some of LayoutManagers, for related examples for LayoutManagers check GridBagConstraints for GrigBagLayout

---

The following frame will correctly resize the table when the frame is resized.

public class Sandbox {

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);
        c.fill = GridBagConstraints.BOTH;
        c.weightx = 1;
        c.weighty = 1;
        JTable testTable = new JTable(10, 2);
        panel.add(testTable, c);

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

}

---

Perhaps with:

GridBagConstraints.fill = GridBagContraints.BOTH;