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본문내용
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Alu extends JFrame implements ActionListener, ItemListener
{
//변수 선언
protected JTextField field;
protected JButton b1,b2,b3,b4,b5,b6,b7,b8,b9,b0,b10,b11,b12,b13,b14,b15;
protected JButton op1,op2,op3;
protected JButton a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14;
protected JButton c1,c2,c3,c4,c5,c6,c7,c8,c9,c10,c11,c12,c13,c14,c15,c16,c17,c18,c19,c20,c21,c22,c23,c24,c25;
protected JCheckBox ch1, ch2;
protected JRadioButton ra1,ra2,ra3,ra4,r1,r2,r3;
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