javaのcomboBoxでデーターの右寄表示

javaのcomboBoxで表示データーの右寄せ表示について質問します。 Q1)下記のコードでどの様に変更すれば良いでしょうか？ ====================== import java.awt.BorderLayout; import java.awt.Container; import java.awt.Dimension; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JPanel; public class comboBox_Right extends JFrame { public static JComboBox[] combo=new JComboBox[4]; static comboBox_Right frame; public static void main(String args[]){ frame=new comboBox_Right("AAAA"); frame.setVisible(true); } comboBox_Right(String title) { setTitle(title); setBounds(100, 100, 300, 420); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JPanel p = new JPanel(); //======================================== //ComboBox data String[][] combodata = { {"A0", "B0", "C0", "D0"}, //No.1 Combo {"A1", "B1", "C1", "D1"}, //No.1 Combo {"A2", "B2", "C2", "D2"}, //No.1 Combo {"A3", "B3", "C3", "D3"}, //No.1 Combo }; for(int i=0; i<4; i++){ combo[i] = new JComboBox(combodata[i]); //make 4 comboBox combo[i].setPreferredSize(new Dimension(175, 25)); //ComboBox Size } //=============== for(int i=0; i<4; i++) p.add(combo[i]); //add 4 comboBox //=============== Container contentPane = getContentPane(); contentPane.add(p, BorderLayout.CENTER); } } =============================== 以上、宜しくお願いします。