Re:4월26일까지 개인과제중.. - 박태O

[박태영]

1. 사칙연산 계산기 어플을 완성시키세요.

package practice;

import java.awt.BorderLayout;

import java.awt.EventQueue;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.border.EmptyBorder;

import java.awt.Color;

import javax.swing.JTextField;

import javax.swing.JComboBox;

import javax.swing.DefaultComboBoxModel;

import javax.swing.JTextArea;

import javax.swing.JButton;

import javax.swing.JLabel;

import java.awt.Font;

import java.awt.TextField;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

public class MyFrame01 extends JFrame implements ActionListener{

private JPanel contentPane; // 사용할 틀

private JTextField textfield1; // 텍스트필드 숫자 기입할 1번째 필드

private JTextField textfield2; // 텍스트필드 숫자 기입할 2번째 필드

private JComboBox combo; // 콤보박스에 대한 생성

private JButton calcstart; // 계산 누를 때 버튼 관련 생성

private JButton clear; // 초기화 버튼 누를 때 버튼 생성 관련

private JTextArea result; // 계산한 후 결과 값 나오는 곳.

private String text1, text2, combobuttn;

private int n1, n2, res;

/**

* Launch the application.

*/

public static void main(String[] args) {

EventQueue.invokeLater(new Runnable() {

public void run() {

try {

MyFrame01 frame = new MyFrame01();

frame.setVisible(true);

} catch (Exception e) {

e.printStackTrace();

}

}

});

}

/**

* Create the frame.

*/

public MyFrame01() {

setTitle("계산기");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setBounds(450, 250, 450, 300);

contentPane = new JPanel();

contentPane.setToolTipText("");

contentPane.setBackground(Color.ORANGE);

contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));

setContentPane(contentPane);

contentPane.setLayout(null);

textfield1 = new JTextField();

textfield1.setBounds(42, 53, 116, 21);

contentPane.add(textfield1);

textfield1.setColumns(10);

textfield2 = new JTextField();

textfield2.setBounds(262, 53, 116, 21);

contentPane.add(textfield2);

textfield2.setColumns(10);

String[] op = {"" ,"+" ,"-" ,"*" ,"/"};

combo = new JComboBox(op);

combo.setBounds(184, 82, 43, 21);

contentPane.add(combo);

calcstart = new JButton("계산");

calcstart.setBounds(303, 150, 97, 33);

contentPane.add(calcstart);

clear = new JButton("초기화");

clear.setBounds(303, 193, 97, 33);

contentPane.add(clear);

result = new JTextArea();

result.setFont(new Font("맑은 고딕", Font.BOLD, 15));

result.setBackground(Color.ORANGE);

result.setForeground(Color.BLACK);

result.setBounds(181, 193, 110, 33);

contentPane.add(result);

JLabel lblNewLabel = new JLabel("숫자를 입력해주세요.");

lblNewLabel.setFont(new Font("휴먼모음T", Font.PLAIN, 13));

lblNewLabel.setBounds(153, 10, 130, 15);

contentPane.add(lblNewLabel);

// 이벤트 감시 하는 부분

calcstart.addActionListener(this);

clear.addActionListener(this);

}

@Override

public void actionPerformed(ActionEvent e) { // 이 부분 전부 이해가 필요합니다..

Object obj = e.getSource();

if(obj == calcstart) {

text1 = textfield1.getText().trim();

text2 = textfield2.getText().trim();

combobuttn = (String) combo.getSelectedItem(); // String으로 캐스팅한 것이 이해가 가지않음.

calc();

} else if(obj == clear) {

textfield1.setText("");

textfield2.setText("");

result.setText("");

}

}

private void calc() { // 이부분도 이해가 안돼서 도움이 필요합니다.

n1 = Integer.parseInt(text1);

n2 = Integer.parseInt(text2);

switch (combobuttn.charAt(0)) {

case '+' : 

res = n1 + n2;

break;

case '-' :

res = n1 - n2;

break;

case '*' :

res = n1 * n2;

break;

case '/' :

res = n1 / n2;

break;

}

result.setText(res + "");

}

}

2. 사칙연산 게임 계산기 완성시키세요.

package quizframe;

import java.awt.Button;

import java.awt.Color;

import java.awt.Frame;

import java.awt.GridLayout;

import java.awt.Panel;

import java.awt.TextField;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.MouseAdapter;

import java.awt.event.MouseEvent;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.util.Random;

import java.awt.Font;

public class MyQuiz extends Frame {

    //멤버변수

    private TextField myQuizField;

    private TextField iptAnswer;

    private Button startBtn;

    private TextField resultField;

    private Button clearBtn;

    private int rightAnswer;

        public static void main(String[] args) {

            // TODO Auto-generated method stub

            MyQuiz quiz = new MyQuiz("사칙연산퀴즈");

            quiz.setVisible(true);

        }

    private ActionListener textFieldEventHandler = new ActionListener() {

        @Override

        public void actionPerformed(ActionEvent e) {

            String Answer = iptAnswer.getText();

            if (Answer.equals(Integer.toString(rightAnswer))) {

                resultField.setText("정답입니다.");

            } else {

                resultField.setText("오답입니다 공부하세요^^7");

            }

        }

    };

    public MyQuiz(String title) {

        super(title);

        init();

    }

    public void set() {

        int num1 = (int) (Math.random() * 10) + 1;

        int num2 = (int) (Math.random() * 10) + 1;

        int i = (int) (Math.random() * 4); 

        String[] op = { "+", "-", "×", "÷" };

        int[] result = { num1+num2, num1-num2, num1*num2, num1/num2 };

        rightAnswer = result[i];

        myQuizField.setText(num1 + "  " + op[i] +"  " + num2 + " = ");

        iptAnswer.setText("");

        resultField.setText("");

    }

    public void init() {

        addWindowListener(new WindowAdapter() {

            public void windowClosing(WindowEvent e) {

                System.exit(0);

            }

        });

        setBounds(650, 350, 386, 322);

        setBackground(Color.PINK);

        myQuizField = new TextField();

        myQuizField.setFont(new Font("궁서체", Font.ITALIC, 18));

        myQuizField.setBackground(Color.LIGHT_GRAY);

        startBtn = new Button("Start");

        startBtn.setFont(new Font("돋움", Font.BOLD, 14));

        startBtn.setBackground(Color.PINK);

        resultField = new TextField();

        resultField.setFont(new Font("궁서체", Font.BOLD, 18));

        resultField.setBackground(Color.PINK);

        iptAnswer = new TextField();

        iptAnswer.setFont(new Font("궁서체", Font.BOLD, 16));

        iptAnswer.setBackground(Color.LIGHT_GRAY);

        clearBtn = new Button("Retry");

        clearBtn.setFont(new Font("돋움체", Font.BOLD, 16));

        clearBtn.setBackground(Color.PINK);

        set();

        Panel p = new Panel(new GridLayout(1, 3));

        add(p, "North");

        add(resultField, "Center");

        add(clearBtn, "South");

        p.add(myQuizField);

        p.add(iptAnswer);

        p.add(startBtn);

        startBtn.addActionListener(textFieldEventHandler);

        clearBtn.addActionListener(new ActionListener() {

            @Override

            public void actionPerformed(ActionEvent e) {

                set();

            }

        });    

        iptAnswer.addMouseListener(new MouseAdapter() {

            @Override

            public void mouseClicked(MouseEvent e) {

                iptAnswer.setText("");

            }

        });

    }

}

3. 윈도우 계산기 프로그램을 완성시키세요.