자바 대상 언어 를 사용 하여 가감 승제 계산 기 를 만 드 는 방법 은 코드 가 있어 야 합 니 다.

자바 대상 언어 를 사용 하여 가감 승제 계산 기 를 만 드 는 방법 은 코드 가 있어 야 합 니 다.

다음 파일 이름 은:JiSuanQi.java import java.awt.*;import java.awt.event.*;public class JiSuanQi{   String s="",s1=null,s2=null;   Frame f=new Frame("계산기");  TextField tf=new TextField(30);  Panel p1=new Panel();  Panel p2=new Panel();  Panel p3=new Panel();  Button bt1=new Button("=");  Button bt2=new Button("삭제");  Button[] bt=new Button[16];  int id=0;   public static void main(String[] args)   {       new JiSuanQi().init();   }    public void init()    {       f.setBackground(new Color(85,247,253));       f.setLayout(new BorderLayout(4,4));       p2.setLayout(new GridLayout(4,4,4,4));       p3.setLayout(new BorderLayout(4,4));       f.setResizable(false);       f.add(p1,BorderLayout.NORTH);       f.add(p2);       p3.add(bt2,BorderLayout.NORTH);       p3.add(bt1);       p1.add(tf);       f.add(p3,BorderLayout.EAST);       String[] b={"1","2","3","+","4","5","6","-","7","8","9","*","0",".","리 셋","/"};       for(int i=0;i<16;i++)       {           bt[i]=new Button(b[i]);           p2.add(bt[i]);       }       bt[0].setForeground(Color.blue);       bt[1].setForeground(Color.blue);       bt[2].setForeground(Color.blue);       bt[4].setForeground(Color.blue);       bt[5].setForeground(Color.blue);       bt[6].setForeground(Color.blue);       bt[8].setForeground(Color.blue);       bt[9].setForeground(Color.blue);       bt[10].setForeground(Color.blue);       bt[12].setForeground(Color.blue);       bt[13].setForeground(Color.blue);       bt[3].setForeground(Color.red);       bt[7].setForeground(Color.red);       bt[11].setForeground(Color.red);       bt[15].setForeground(Color.red);       bt[14].setForeground(Color.red);       bt1.setForeground(Color.red);       bt2.setForeground(Color.red);       f.pack();       f.setVisible(true);       f.addWindowListener(new WindowAdapter()       {          public void windowClosing(WindowEvent e)          {             System.exit(0);           }        }       );       bt[0].addActionListener(new ActionListener()       {           public void actionPerformed(ActionEvent e)           {                 s+=1;                 s2+=1;                 tf.setText(s);           }       }       );          bt[1].addActionListener(new ActionListener()       {           public void actionPerformed(ActionEvent e)           {                 s+=2;                 s2+=2;                 tf.setText(s);           }       }       );       bt[2].addActionListener(new ActionListener()       {           public void actionPerformed(ActionEvent e)           {                 s+=3;                 s2+=3;                 tf.setText(s);           }       }       );       bt[4].addActionListener(new ActionListener()       {           public void actionPerformed(ActionEvent e)           {                 s+=4;                 s2+=4;                 tf.setText(s);           }       }       );       bt[5].addActionListener(new ActionListener()       {           public void actionPerformed(ActionEvent e)           {                 s+=5;                 s2+=5;                 tf.setText(s);           }       }       );       bt[6].addActionListener(new ActionListener()       {           public void actionPerformed(ActionEvent e)           {                 s+=6;                 s2+=6;                 tf.setText(s);           }       }       );       bt[8].addActionListener(new ActionListener()       {           public void actionPerformed(ActionEvent e)           {                 s+=7;                 s2+=7;                 tf.setText(s);           }       }       );       bt[9].addActionListener(new ActionListener()       {           public void actionPerformed(ActionEvent e)       &n