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import java.awt.*;
import java.awt.event.*;
public class test extends JFrame{
static Container c;
static JTextArea text;
static JButton[] arrayBtn;
static JButton equ;
static int buffer1=0;
static int buffer2=0;
static boolean is;
public test(){
setVisible(true);
setSize(350,350);
c=getContentPane();
c.setLayout(new GridLayout(5,3,10,10));
text=new JTextArea();
text.setText("Result");
text.setEditable(false);
c.add(text);
c.add(new JButton("+"));
equ=new JButton("=");
equ.addActionListener(new ActionListener(){
public void actionPerformed(actionEvent ae){
text.setText(""+buffer1+buffer2);
buffer1=0;
buffer2=0;
}
});
c.add(equ);
arrayBtn=new JButton[10];
for(int i=1; i<arrayBtn.length; i++){
arrayBtn[i]=new JButton(""+i);
arrayBtn[i].addActionListener(new ActionListener(){
public void actionPerformed(actionEvent ae){
if(buffer1==0){
buffer1=i;
}else if(buffer2==0){
buffer2=i;
}
}
});
c.add(arrayBtn[i]);
}
}
public static void main(String []args){
test frame = new test();
}
}
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