@Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub if (e.getSource() == b1) { int index = box.getSelectedIndex(); String column = ""; if (index == 0) column = "ename"; else if (index == 1) column = "hiredate"; else column = "deptno"; String data = tf.getText().trim(); if (data.length() < 1) { tf.requestFocus(); return; } getFindData(column, data); } if (e.getSource() == b2) { getData(); } }