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JAVAͼÐνçÃæÎÊÌâ - Java / Java SE

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import java.awt.*;
public class calculator
{
  public static void main(String args[])
  {
  int i;
  Frame f1=new Frame();
  BorderLayout b=new BorderLayout();
  f1.setLayout(b);
  f1.setBounds(100,100,280,300);
  f1.setResizable(false);
  f1.setVisible(true);
  TextField mainTxt=new TextField("0");
  f1.add(mainTxt,BorderLayout.NORTH);
   
  Panel p1=new Panel();
  p1.setLayout(new BorderLayout(0,15));
  f1.add(p1);
   
  Panel p2=new Panel();
  p1.add(p2,BorderLayout.NORTH);
  p2.setLayout(new GridLayout(1,4,5,5));
  TextField t1=new TextField();
  p2.add(t1);
  Button b1[]=new Button[3];
   
  b1[0]=new Button("Backspace");
  b1[1]=new Button("CE");
  b1[2]=new Button("C");
  for(i=0;i<3;i++)
  {
  p2.add(b1[i]);
  }
   
  Panel p3=new Panel();
  p1.add(p3);
  p3.setLayout(new GridLayout(4,6,5,5));
  Button b2[]=new Button[24];
  String s[]={&quo


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