计算机代码

package com.bizpoint.gwt.training.client;

import com.google.gwt.user.client.ui.Button;

public class TrainingEntryPoint implements EntryPoint {
double num1,num2;
String sign;
  RootPanel rp=RootPanel.get();
  TextBox tb;
  Button jb0;
  Button jb1;
  Button jb2;
  Button jb3;
  Button jb4;
  Button jb5;
  Button jb6;
  Button jb7;
  Button jb8;
  Button jb9;
  Button jbAdd;
  Button jbDec;
  Button jbMul;
  Button jbDiv;
  Button jbPoint;
  Button jbEqual;
  Button jbBack;
  
  
  public TrainingEntryPoint(){

  tb=new TextBox();
  tb.setHeight("30");
  tb.setWidth("105");
  jb0=new Button("0");
  jb0.setHeight("30");
  jb0.setWidth("40");
  jb1=new Button("1");
  jb1.setHeight("30");
  jb1.setWidth("40");
  jb2=new Button("2");
  jb2.setHeight("30");
  jb2.setWidth("40");
  jb3=new Button("3");
  jb3.setHeight("30");
  jb3.setWidth("40");
  jb4=new Button("4");
  jb4.setHeight("30");
  jb4.setWidth("40");
  jb5=new Button("5");
  jb5.setHeight("30");
  jb5.setWidth("40");
  jb6=new Button("6");
  jb6.setHeight("30");
  jb6.setWidth("40");
  jb7=new Button("7");
  jb7.setHeight("30");
  jb7.setWidth("40");
  jb8=new Button("8");
  jb8.setHeight("30");
  jb8.setWidth("40");