Java Program to increase the row height in a JTable

To increase the row height, use the setRowHeight() method for a table in Java. Row height is the height of the row in pixels.

Let’s say the following is our table −

DefaultTableModel tableModel = new DefaultTableModel();
JTable table = new JTable(tableModel);

Set the rows and columns and increase the row height by first getting the current height and incrementing it. We are incrementing by 20 pixels here −

table.setRowHeight(table.getRowHeight() + 20);

The following is an example to increase the row height −

Example

package my;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
public class SwingDemo {
   public static void main(String[] argv) throws Exception {
      DefaultTableModel tableModel = new DefaultTableModel();
      JTable table = new JTable(tableModel);
      tableModel.addColumn("Language/ Technology");
      tableModel.addColumn("Difficulty Level");
      tableModel.insertRow(0, new Object[] { "CSS", "Easy" });
      tableModel.insertRow(0, new Object[] { "HTML5", "Easy"});
      tableModel.insertRow(0, new Object[] { "JavaScript", "Intermediate" });
      tableModel.insertRow(0, new Object[] { "jQuery", "Intermediate" });
      tableModel.insertRow(0, new Object[] { "AngularJS", "Difficult"});
      // adding a new row
      tableModel.insertRow(tableModel.getRowCount(), new Object[] {"ExpressJS", "Intermediate" });
      // appending a new row
      tableModel.addRow(new Object[] { "WordPress", "Easy" });
      // set row height
      table.setRowHeight(table.getRowHeight() + 20);
      JFrame f = new JFrame();
      f.setSize(550, 350);
      f.add(new JScrollPane(table));
      f.setVisible(true);
   }
}

The output is as follows. Here we have set the row height to 20 −

Now, let us change the row height to 5 and spot the difference −