import java.awt.*;  import java.awt.event.*; import javax.swing.*;   public class Adder implements ActionListener {  JFrame AdderFrame;  JTextField TOprand1;  JTextField TOprand2;  JLabel LAdd,LSum;  JButton BAdd,BClear;  JPanel JP1,JP2;  public Adder()  {   AdderFrame=new JFrame("AdderFrame");   TOprand1=new JTextField("0.0");   TOprand2=new JTextField("0.0");   LAdd=new JLabel("+");   LSum=new JLabel("=   ");   BAdd=new JButton("Add");   BClear=new JButton("C

:L   阔以排个扳在来吗，童鞋。