Java tutorial
import java.awt.BorderLayout; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.table.TableColumn; public class ResizeColumnWidth { public static void main(String args[]) { final Object rowData[][] = { { "1", "one", "I" }, { "2", "two", "II" }, { "3", "three", "III" } }; final String columnNames[] = { "#", "English", "Roman" }; final JTable table = new JTable(rowData, columnNames); JScrollPane scrollPane = new JScrollPane(table); JFrame frame = new JFrame("Resizing Table"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.add(scrollPane, BorderLayout.CENTER); TableColumn column = null; for (int i = 0; i < 3; i++) { column = table.getColumnModel().getColumn(i); if (i == 2) { column.setPreferredWidth(100); //sport column is bigger } else { column.setPreferredWidth(50); } } frame.setSize(300, 150); frame.setVisible(true); } }