import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Arrays;
import java.util.List;


import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.WindowConstants;
import javax.swing.table.AbstractTableModel;


public class JTableZeilenTauschen {


	private static class MyTableModel extends AbstractTableModel {

		private List<String> data = Arrays.asList("x1", "x2", "x3", "x4");

		// eine zusatzmethode zum vertauschen
		public void tauscheZeile() {
			String tmp = this.data.get(0);
			this.data.set(0, this.data.get(1));
			this.data.set(1, tmp);
			// nicht vergessen dieses ereignis zu feuern -> repaint
			this.fireTableDataChanged();
		}

		// folgende 3 methoden muessen implementiert werden
		public int getColumnCount() {
			return 1;
		}


		public int getRowCount() {
			return this.data.size();
		}


		public Object getValueAt(int rowIndex, int columnIndex) {
			return this.data.get(rowIndex);
		}

	}

	public static void main(String[] args) {

		final MyTableModel model = new MyTableModel();
		JTable tbl = new JTable(model);

		JButton btn = new JButton("vertausche ersten zwei zeilen");
		btn.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				model.tauscheZeile();
			}

		});

		JPanel p = new JPanel();
		p.add(btn);
		p.add(new JScrollPane(tbl));

		JFrame f = new JFrame();
		f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
		f.getContentPane().add(p);
		f.pack();
		f.setVisible(true);
	}

}