CODEWITHSUNDEEP
javaswingjtablejtableheaderpreferredsize
Anubis
Anubis

Reputation: 7445

How to change JTable header height?

Title explains the question. How can I easily do that?

Upvotes: 17

Views: 40528

Answers (6)

bitguru
bitguru

Reputation: 21

Font bigFont = new Font("sansserif", Font.PLAIN, 24); // or whatever
myTable.getTableHeader().setFont(bigFont);

This is a simple way to increase the preferredSize of the TableHeader. It will increase the height of the header, but if your column names are too long then they might not fit widthwise.

Upvotes: 1

SVlad
SVlad

Reputation: 51

Instead of overriding JViewport.getPreferredSize like in aterai answer you can just set preferred width.

JScrollPane scroll = new JScrollPane(table2);
scroll.getColumnHeader().setPreferredSize(new Dimension(0, HEADER_HEIGHT));

JScrollPane ignores column header width, so you can safely set zero here.

Upvotes: 0

adjieq
adjieq

Reputation: 99

Try this 

JTableHeader th = table.getTableHeader();
th.setPreferredSize(new Dimension(100, 100));

Upvotes: 0

Venkatesh Bandarapu
Venkatesh Bandarapu

Reputation: 401

try this.....

if jtable attached to scrollpane 
  then 
table.getTableHeader().setPreferredSize(
     new Dimension(scrollpane.getwidth(),height)
);

else
  table.getTableHeader().setPreferredSize(
     new Dimension(width,height)
);

Upvotes: 2

Carlos
Carlos

Reputation: 1

You can also use a very large width when setting the preferred header dimension, which swing truncate as per the required widths in the column model.

tableHeader.setPreferredSize(new Dimension(10000, HEADER_HEIGHT));

Upvotes: -1

aterai
aterai

Reputation: 9833

enter image description here

import java.awt.*;
import java.awt.event.*;
import java.util.List;
import java.util.Arrays;
import javax.swing.*;
import javax.swing.table.*;

public class TableHeaderHeightTest {
  private static int HEADER_HEIGHT = 32;
  private JTable makeTable() {
    JTable table = new JTable(new DefaultTableModel(2, 20));
    table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
    return table;
  }
  public JComponent makeUI() {
    JPanel p = new JPanel(new GridLayout(2,1));

    JTable table1 = makeTable();
    //Bad: >>>>
    JTableHeader header = table1.getTableHeader();
    //Dimension d = header.getPreferredSize();
    //d.height = HEADER_HEIGHT;
    //header.setPreferredSize(d); //addColumn case test
    header.setPreferredSize(new Dimension(100, HEADER_HEIGHT));
    p.add(makeTitledPanel("Bad: JTableHeader#setPreferredSize(...)", new JScrollPane(table1)));
    //<<<<

    JTable table2 = makeTable();
    JScrollPane scroll = new JScrollPane(table2);
    scroll.setColumnHeader(new JViewport() {
      @Override public Dimension getPreferredSize() {
        Dimension d = super.getPreferredSize();
        d.height = HEADER_HEIGHT;
        return d;
      }
    });
//         //or
//         table2.setTableHeader(new JTableHeader(table2.getColumnModel()) {
//             @Override public Dimension getPreferredSize() {
//                 Dimension d = super.getPreferredSize();
//                 d.height = HEADER_HEIGHT;
//                 return d;
//             }
//         });
    p.add(makeTitledPanel("Override getPreferredSize()", scroll));

    final List<JTable> list = Arrays.asList(table1, table2);

    JPanel panel = new JPanel(new BorderLayout());
    panel.add(p);
    panel.add(new JButton(new AbstractAction("addColumn") {
      @Override public void actionPerformed(ActionEvent e) {
        for(JTable t: list) {
          t.getColumnModel().addColumn(new TableColumn());
          JTableHeader h = t.getTableHeader();
          Dimension d = h.getPreferredSize();
          System.out.println(d);
        }
      }
    }), BorderLayout.SOUTH);
    panel.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
    return panel;
  }
  private static JComponent makeTitledPanel(String title, JComponent c) {
    JPanel p = new JPanel(new BorderLayout());
    p.add(c);
    p.setBorder(BorderFactory.createTitledBorder(title));
    return p;
  }
  public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
      @Override public void run() {
        createAndShowGUI();
      }
    });
  }
  public static void createAndShowGUI() {
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    f.getContentPane().add(new TableHeaderHeightTest().makeUI());
    f.setSize(320, 320);
    f.setLocationRelativeTo(null);
    f.setVisible(true);
  }
}

Upvotes: 41

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