質問編集履歴
1
インデントが見える様にした。
test
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test
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@@ -28,395 +28,401 @@
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ソースコード
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import javax.swing.JFrame;
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import javax.swing.JPanel;
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import javax.swing.JButton;
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import javax.swing.JTextField;
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import javax.swing.border.LineBorder;
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import java.awt.BorderLayout;
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import java.awt.GridLayout;
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import java.awt.Color;
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import java.awt.Font;
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import java.awt.Dimension;
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import java.awt.event. *;
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import java.math.BigDecimal;
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public class Dentaku extends JFrame implements ActionListener{
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JTextField jtf = new JTextField(20);
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//ボタン作成
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JButton btn1 = new JButton("１");
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JButton btn2 = new JButton("２");
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JButton btn3 = new JButton("３");
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JButton btn4 = new JButton("４");
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JButton btn5 = new JButton("５");
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JButton btn6 = new JButton("６");
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JButton btn7 = new JButton("７");
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JButton btn8 = new JButton("８");
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JButton btn9 = new JButton("９");
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JButton btnTasu = new JButton("＋");
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JButton btnHiku = new JButton("－");
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JButton btnKakeru = new JButton("×");
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JButton btnWaru = new JButton("÷");
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JButton btnIkoru = new JButton("＝");
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JButton btn0 = new JButton("０");
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JButton btnClear = new JButton("AC");
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static int i = 0;//最初の数をString→intにする。
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static int j = 0;//加減乗除判別
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static BigDecimal i2; //割り算用最初の数
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static BigDecimal k2;//割り算用次の数
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public static void main(String[] args){
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Dentaku jf = new Dentaku();
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jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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jf.setVisible(true);
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}
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Dentaku(){
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//フレームの作成
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setBounds(100, 100, 500, 500);
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setTitle("自作電卓");
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//上側のパネルの作成
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JPanel jp1 = new JPanel();
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jp1.setBackground(Color.BLACK);
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jp1.setPreferredSize(new Dimension(500, 100));
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jp1.setLayout(new BorderLayout());
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//真ん中のパネルの作成
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JPanel jp2 = new JPanel();
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jp2.setBackground(Color.RED);
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GridLayout layout = new GridLayout();
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layout.setColumns(3);
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layout.setRows(4);
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jp2.setLayout(layout);
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//ボタンをアクションリスナーに登録
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btn1.addActionListener(this);
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btn2.addActionListener(this);
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btn3.addActionListener(this);
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btn4.addActionListener(this);
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btn5.addActionListener(this);
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btn6.addActionListener(this);
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btn7.addActionListener(this);
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btn8.addActionListener(this);
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btn9.addActionListener(this);
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btnTasu.addActionListener(this);
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btnHiku.addActionListener(this);
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btnKakeru.addActionListener(this);
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btnWaru.addActionListener(this);
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btnIkoru.addActionListener(this);
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btn0.addActionListener(this);
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btnClear.addActionListener(this);
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//ボタン貼り付け
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jp2.add(btn1);
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jp2.add(btn2);
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jp2.add(btn3);
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jp2.add(btnTasu);
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jp2.add(btn4);
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jp2.add(btn5);
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jp2.add(btn6);
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jp2.add(btnHiku);
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jp2.add(btn7);
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jp2.add(btn8);
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jp2.add(btn9);
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jp2.add(btnKakeru);
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jp2.add(btnIkoru);
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jp2.add(btn0);
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jp2.add(btnClear);
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jp2.add(btnWaru);
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//テキストフィールド作成
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jtf.setPreferredSize(new Dimension(300, 80));
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jtf.setBorder(new LineBorder(Color.BLACK, 6));
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jtf.setFont(new Font("MSゴシック", Font.PLAIN, 32));
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//テキストフィールド貼り付け
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jp1.add(jtf);
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//フレームにパネルを張り付ける
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getContentPane().add(jp1, BorderLayout.NORTH);
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getContentPane().add(jp2, BorderLayout.CENTER);
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}
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public void actionPerformed(ActionEvent e){
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String kazu = jtf.getText();
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if (e.getSource() == btn1 ){ //1のボタンを押した場合
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jtf.setText( kazu + "1");
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}else if (e.getSource() == btn2 ){ //2のボタンを押した場合
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jtf.setText( kazu + "2");
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}else if (e.getSource() == btn3 ){ //3のボタンを押した場合
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jtf.setText( kazu + "3");
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}else if (e.getSource() == btn4 ){ //4のボタンを押した場合
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jtf.setText( kazu + "4");
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}else if (e.getSource() == btn5 ){ //5のボタンを押した場合
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jtf.setText( kazu + "5");
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}else if (e.getSource() == btn6 ){ //6のボタンを押した場合
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jtf.setText( kazu + "6");
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}else if (e.getSource() == btn7 ){ //7のボタンを押した場合
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jtf.setText( kazu + "7");
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}else if (e.getSource() == btn8 ){ //8のボタンを押した場合
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jtf.setText( kazu + "8");
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}else if (e.getSource() == btn9 ){ //9のボタンを押した場合
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jtf.setText( kazu + "9");
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}else if (e.getSource() == btn0 ){ //0のボタンを押した場合
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jtf.setText( kazu + "0");
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}else if (e.getSource() == btnTasu ){ //+のボタンを押した場合
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i = Integer.parseInt(kazu);
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j = 1;
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jtf.setText("");
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}else if (e.getSource() == btnHiku ){ //-のボタンを押した場合
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i = Integer.parseInt(kazu); //String→intに入力した変換
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j = 2;
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jtf.setText("");
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}else if (e.getSource() == btnKakeru ){ //×のボタンを押した場合
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i = Integer.parseInt(kazu); //最初の数字をString→intに入力した変換
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j = 3;
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jtf.setText("");
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}else if (e.getSource() == btnWaru ){ //÷のボタンを押した場合
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BigDecimal i2 = new BigDecimal(kazu);
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i = Integer.parseInt(kazu);
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j = 4;
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jtf.setText("");
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}else if (e.getSource() == btnClear ){ //ACボタンを押した場合
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jtf.setText("");
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}else if (e.getSource() == btnIkoru ){ //＝のボタンを押した場合
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BigDecimal k2 = new BigDecimal(kazu); //次の数字をString→intに入力した変換
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int k = Integer.parseInt(kazu);
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int ansint = 0;
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if ( j == 1 ){ //足し算の場合
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ansint = i + k;
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String ans = String.valueOf(ansint);
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jtf.setText(ans);
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}else if ( j == 2 ){ //引き算の場合
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ansint = i - k;
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String ans = String.valueOf(ansint);
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jtf.setText(ans);
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}else if ( j == 3 ){ //掛け算の場合
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ansint = i * k;
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392
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String ans = String.valueOf(ansint);
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jtf.setText(ans);
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}else if ( j == 4 ){ //割り算の場合
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BigDecimal ansbi = i2.divide(k2);
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400
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401
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String ans = ansbi.toString();
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jtf.setText(ans);
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404
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}
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406
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407
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408
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409
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}
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410
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411
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}
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414
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415
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416
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import javax.swing.JFrame;
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import javax.swing.JPanel;
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import javax.swing.JButton;
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import javax.swing.JTextField;
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import javax.swing.border.LineBorder;
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import java.awt.BorderLayout;
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import java.awt.GridLayout;
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import java.awt.Color;
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import java.awt.Font;
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import java.awt.Dimension;
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import java.awt.event. *;
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import java.math.BigDecimal;
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public class Dentaku extends JFrame implements ActionListener{
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JTextField jtf = new JTextField(20);
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//ボタン作成
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JButton btn1 = new JButton("１");
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JButton btn2 = new JButton("２");
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JButton btn3 = new JButton("３");
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JButton btn4 = new JButton("４");
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JButton btn5 = new JButton("５");
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JButton btn6 = new JButton("６");
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JButton btn7 = new JButton("７");
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JButton btn8 = new JButton("８");
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JButton btn9 = new JButton("９");
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JButton btnTasu = new JButton("＋");
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JButton btnHiku = new JButton("－");
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JButton btnKakeru = new JButton("×");
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JButton btnWaru = new JButton("÷");
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JButton btnIkoru = new JButton("＝");
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JButton btn0 = new JButton("０");
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JButton btnClear = new JButton("AC");
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static int i = 0;//最初の数をString→intにする。
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static int j = 0;//加減乗除判別
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static BigDecimal i2; //割り算用最初の数
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static BigDecimal k2;//割り算用次の数
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public static void main(String[] args){
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Dentaku jf = new Dentaku();
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jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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jf.setVisible(true);
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}
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Dentaku(){
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//フレームの作成
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setBounds(100, 100, 500, 500);
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setTitle("自作電卓");
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//上側のパネルの作成
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JPanel jp1 = new JPanel();
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jp1.setBackground(Color.BLACK);
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jp1.setPreferredSize(new Dimension(500, 100));
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jp1.setLayout(new BorderLayout());
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156
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157
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//真ん中のパネルの作成
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159
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JPanel jp2 = new JPanel();
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jp2.setBackground(Color.RED);
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165
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GridLayout layout = new GridLayout();
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layout.setColumns(3);
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layout.setRows(4);
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jp2.setLayout(layout);
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//ボタンをアクションリスナーに登録
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179
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btn1.addActionListener(this);
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181
|
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btn2.addActionListener(this);
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183
|
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btn3.addActionListener(this);
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185
|
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btn4.addActionListener(this);
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187
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btn5.addActionListener(this);
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189
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btn6.addActionListener(this);
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191
|
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btn7.addActionListener(this);
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192
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193
|
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btn8.addActionListener(this);
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194
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195
|
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btn9.addActionListener(this);
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196
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197
|
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btnTasu.addActionListener(this);
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198
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199
|
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btnHiku.addActionListener(this);
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200
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201
|
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btnKakeru.addActionListener(this);
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202
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203
|
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btnWaru.addActionListener(this);
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204
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205
|
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btnIkoru.addActionListener(this);
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206
|
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|
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207
|
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btn0.addActionListener(this);
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208
|
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209
|
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btnClear.addActionListener(this);
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210
|
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211
|
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212
|
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|
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213
|
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//ボタン貼り付け
|
|
214
|
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|
|
215
|
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jp2.add(btn1);
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216
|
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217
|
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jp2.add(btn2);
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218
|
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219
|
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jp2.add(btn3);
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220
|
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221
|
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jp2.add(btnTasu);
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222
|
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223
|
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jp2.add(btn4);
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224
|
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225
|
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jp2.add(btn5);
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226
|
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227
|
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jp2.add(btn6);
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228
|
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229
|
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jp2.add(btnHiku);
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230
|
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231
|
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jp2.add(btn7);
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232
|
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233
|
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jp2.add(btn8);
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234
|
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235
|
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jp2.add(btn9);
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|
236
|
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237
|
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jp2.add(btnKakeru);
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238
|
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|
239
|
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jp2.add(btnIkoru);
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240
|
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|
241
|
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jp2.add(btn0);
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242
|
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243
|
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jp2.add(btnClear);
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244
|
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|
245
|
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jp2.add(btnWaru);
|
|
246
|
-
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|
247
|
-
|
|
248
|
-
|
|
249
|
-
//テキストフィールド作成
|
|
250
|
-
|
|
251
|
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jtf.setPreferredSize(new Dimension(300, 80));
|
|
252
|
-
|
|
253
|
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jtf.setBorder(new LineBorder(Color.BLACK, 6));
|
|
254
|
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|
|
255
|
-
jtf.setFont(new Font("MSゴシック", Font.PLAIN, 32));
|
|
256
|
-
|
|
257
|
-
|
|
258
|
-
|
|
259
|
-
//テキストフィールド貼り付け
|
|
260
|
-
|
|
261
|
-
jp1.add(jtf);
|
|
262
|
-
|
|
263
|
-
|
|
264
|
-
|
|
265
|
-
//フレームにパネルを張り付ける
|
|
266
|
-
|
|
267
|
-
getContentPane().add(jp1, BorderLayout.NORTH);
|
|
268
|
-
|
|
269
|
-
getContentPane().add(jp2, BorderLayout.CENTER);
|
|
270
|
-
|
|
271
|
-
}
|
|
272
|
-
|
|
273
|
-
|
|
274
|
-
|
|
275
|
-
public void actionPerformed(ActionEvent e){
|
|
276
|
-
|
|
277
|
-
|
|
278
|
-
|
|
279
|
-
String kazu = jtf.getText();
|
|
280
|
-
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|
281
|
-
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|
282
|
-
|
|
283
|
-
|
|
284
|
-
|
|
285
|
-
if (e.getSource() == btn1 ){ //1のボタンを押した場合
|
|
286
|
-
|
|
287
|
-
jtf.setText( kazu + "1");
|
|
288
|
-
|
|
289
|
-
}else if (e.getSource() == btn2 ){ //2のボタンを押した場合
|
|
290
|
-
|
|
291
|
-
jtf.setText( kazu + "2");
|
|
292
|
-
|
|
293
|
-
}else if (e.getSource() == btn3 ){ //3のボタンを押した場合
|
|
294
|
-
|
|
295
|
-
jtf.setText( kazu + "3");
|
|
296
|
-
|
|
297
|
-
}else if (e.getSource() == btn4 ){ //4のボタンを押した場合
|
|
298
|
-
|
|
299
|
-
jtf.setText( kazu + "4");
|
|
300
|
-
|
|
301
|
-
}else if (e.getSource() == btn5 ){ //5のボタンを押した場合
|
|
302
|
-
|
|
303
|
-
jtf.setText( kazu + "5");
|
|
304
|
-
|
|
305
|
-
}else if (e.getSource() == btn6 ){ //6のボタンを押した場合
|
|
306
|
-
|
|
307
|
-
jtf.setText( kazu + "6");
|
|
308
|
-
|
|
309
|
-
}else if (e.getSource() == btn7 ){ //7のボタンを押した場合
|
|
310
|
-
|
|
311
|
-
jtf.setText( kazu + "7");
|
|
312
|
-
|
|
313
|
-
}else if (e.getSource() == btn8 ){ //8のボタンを押した場合
|
|
314
|
-
|
|
315
|
-
jtf.setText( kazu + "8");
|
|
316
|
-
|
|
317
|
-
}else if (e.getSource() == btn9 ){ //9のボタンを押した場合
|
|
318
|
-
|
|
319
|
-
jtf.setText( kazu + "9");
|
|
320
|
-
|
|
321
|
-
}else if (e.getSource() == btn0 ){ //0のボタンを押した場合
|
|
322
|
-
|
|
323
|
-
jtf.setText( kazu + "0");
|
|
324
|
-
|
|
325
|
-
}else if (e.getSource() == btnTasu ){ //+のボタンを押した場合
|
|
326
|
-
|
|
327
|
-
i = Integer.parseInt(kazu);
|
|
328
|
-
|
|
329
|
-
|
|
421
|
+
```
|
|
330
|
-
|
|
331
|
-
|
|
422
|
+
|
|
332
|
-
|
|
333
|
-
}else if (e.getSource() == btnHiku ){ //-のボタンを押した場合
|
|
334
|
-
|
|
335
|
-
i = Integer.parseInt(kazu); //String→intに入力した変換
|
|
336
|
-
|
|
337
|
-
|
|
423
|
+
コード
|
|
338
|
-
|
|
339
|
-
|
|
424
|
+
|
|
340
|
-
|
|
341
|
-
}else if (e.getSource() == btnKakeru ){ //×のボタンを押した場合
|
|
342
|
-
|
|
343
|
-
i = Integer.parseInt(kazu); //最初の数字をString→intに入力した変換
|
|
344
|
-
|
|
345
|
-
|
|
425
|
+
```
|
|
346
|
-
|
|
347
|
-
jtf.setText("");
|
|
348
|
-
|
|
349
|
-
}else if (e.getSource() == btnWaru ){ //÷のボタンを押した場合
|
|
350
|
-
|
|
351
|
-
BigDecimal i2 = new BigDecimal(kazu);
|
|
352
|
-
|
|
353
|
-
i = Integer.parseInt(kazu);
|
|
354
|
-
|
|
355
|
-
j = 4;
|
|
356
|
-
|
|
357
|
-
jtf.setText("");
|
|
358
|
-
|
|
359
|
-
}else if (e.getSource() == btnClear ){ //ACボタンを押した場合
|
|
360
|
-
|
|
361
|
-
|
|
362
|
-
|
|
363
|
-
jtf.setText("");
|
|
364
|
-
|
|
365
|
-
}else if (e.getSource() == btnIkoru ){ //＝のボタンを押した場合
|
|
366
|
-
|
|
367
|
-
BigDecimal k2 = new BigDecimal(kazu); //次の数字をString→intに入力した変換
|
|
368
|
-
|
|
369
|
-
int k = Integer.parseInt(kazu);
|
|
370
|
-
|
|
371
|
-
int ansint = 0;
|
|
372
|
-
|
|
373
|
-
|
|
374
|
-
|
|
375
|
-
if ( j == 1 ){ //足し算の場合
|
|
376
|
-
|
|
377
|
-
ansint = i + k;
|
|
378
|
-
|
|
379
|
-
String ans = String.valueOf(ansint);
|
|
380
|
-
|
|
381
|
-
jtf.setText(ans);
|
|
382
|
-
|
|
383
|
-
}else if ( j == 2 ){ //引き算の場合
|
|
384
|
-
|
|
385
|
-
ansint = i - k;
|
|
386
|
-
|
|
387
|
-
String ans = String.valueOf(ansint);
|
|
388
|
-
|
|
389
|
-
jtf.setText(ans);
|
|
390
|
-
|
|
391
|
-
}else if ( j == 3 ){ //掛け算の場合
|
|
392
|
-
|
|
393
|
-
ansint = i * k;
|
|
394
|
-
|
|
395
|
-
String ans = String.valueOf(ansint);
|
|
396
|
-
|
|
397
|
-
jtf.setText(ans);
|
|
398
|
-
|
|
399
|
-
}else if ( j == 4 ){ //割り算の場合
|
|
400
|
-
|
|
401
|
-
BigDecimal ansbi = i2.divide(k2);
|
|
402
|
-
|
|
403
|
-
String ans = ansbi.toString();
|
|
404
|
-
|
|
405
|
-
jtf.setText(ans);
|
|
406
|
-
|
|
407
|
-
}
|
|
408
|
-
|
|
409
|
-
|
|
410
|
-
|
|
411
|
-
}
|
|
412
|
-
|
|
413
|
-
}
|
|
414
|
-
|
|
415
|
-
|
|
416
|
-
|
|
417
|
-
|
|
418
|
-
|
|
419
|
-
}
|
|
420
426
|
|
|
421
427
|
|
|
422
428
|
|