EXISRING表 name regno subject_code grade result
abc 1000 cs105 C pass
abc 1000 it100 D pass
abc 1000 cs117 B pass
xyz 1001 cs105 E pass
xyz 1001 it100 A pass
xyz 1001 cs117 U fail
拟
public class string implements ActionListener{
JLabel jlab;
public void actionPerformed(ActionEvent Ae){
jlab.setText(Ae.getActionCommand());
}
public static void main(St