心算练习器（基于Java实现）

//Java core packages import java.io.*; import java.awt.*; import java.util.*; import java.awt.event.*; import java.text.SimpleDateFormat; //Java extended packages import javax.swing.*; public class Calculator extends JFrame { private JLabel amountLabel = new JLabel("Amount", JLabel.CENTER); private JLabel digitLabel = new JLabel("Digit", JLabel.CENTER); private JLabel parameterLabel = new JLabel("parameter", JLabel.CENTER); private JTextField amountField = new JTextField(); private JTextField digitField = new JTextField(); private JTextField parameterField = new JTextField(); private JTextArea quizArea = new JTextArea(); private static JButton startButton = new JButton("Start"); private static JButton nextButton = new JButton("Next"); private static JButton enterButton = new JButton("Enter"); private JTextField submitBox = new JTextField(); private GridBagLayout gridBag = new GridBagLayout(); private Container container; Date timeBegin; Date timeEnd; Random r; int[][] testArray; boolean[][] testOperator; char[][] testOperator2; static int amount; static int digit; static int parameter; static int count = 0; static int correct = 0; static long timerBegin = 0; static long timerEnd = 0; public Calculator(String title) { super(title); container = getContentPane(); container.setLayout(gridBag); GridBagConstraints constraints = new GridBagConstraints(); constraints.fill = GridBagConstraints.BOTH; constraints.weightx = 1.0; constraints.weighty = 1.0; //Row 1: //题目数量 constraints.gridx = 0; constraints.gridy = 0; constraints.ipadx = 0; constraints.ipady = 0; gridBag.setConstraints(amountLabel, constraints); container.add(amountLabel); //位数 constraints.gridx = 1; constraints.gridy = 0; constraints.ipadx = 0; constraints.ipady = 0; gridBag.setConstraints(digitLabel, constraints); container.add(digitLabel); //笔数 constraints.gridx = 2; constraints.gridy = 0; constraints.ipadx = 0; constraints.ipady = 0; gridBag.setConstraints(parameterLabel, constraints); container.add(parameterLabel); //Row 2: //题目数量输入区 constraints.gridx = 0; constraints.gridy = 1; constraints.ipadx = 0; constraints.ipady = -50; gridBag.setConstraints(amountField, constraints); container.add(amountField); //位数输入区 constraints.gridx = 1; constraints.gridy = 1; constraints.ipadx = 0; constraints.ipady = -50; gridBag.setConstraints(digitField, constraints); container.add(digitField); //笔数输入区 constraints.gridx = 2; constraints.gridy = 1; constraints.ipadx = 0; constraints.ipady = -50; gridBag.setConstraints(parameterField, constraints); container.add(parameterField); //Row 3: 测验区域 quizArea.setFont(new Font("SansSerif", Font.PLAIN, 24)); quizArea.setText("\n Enjoy This Game!\n"); quizArea.setEditable(false); nextButton.setEnabled(false); enterButton.setEnabled(false); constraints.gridwidth = 3; constraints.gridx = 0; constraints.gridy = 2; constraints.ipadx = 0; constraints.ipady = 50; gridBag.setConstraints(quizArea, constraints); container.add(quizArea); //Row 4:功能按钮 //开始 startButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ae) { try { count = 0; correct = 0; timeBegin = new Date(); timerBegin = timeBegin.getTime(); r = new Random(); amount = Integer.parseInt(amountField.getText()); digit = Integer.parseInt(digitField.getText()); parameter = Integer.parseInt(parameterField.getText()); testArray = new int[amount][parameter + 1]; testOperator = new boolean[amount][parameter - 1]; testOperator2 = new char[amount][parameter - 1]; for(int i = 0; i < amount; i ++) { testArray[i][parameter] = 0; for(int j = 0; j < parameter; j ++) { testArray[i][j] = (int)(Math.pow(10, digit)*r.nextFloat()); if(j == 0) { testArray[i][parameter] = testArray[i][0]; } if(j > 0) { testOperator[i][j - 1] = r.nextBoolean(); if(testOperator[i][j - 1] == true) { testArray[i][parameter] += testArray[i][j]; testOperator2[i][j - 1] = '+'; } else { testArray[i][parameter] -= testArray[i][j]; testOperator2[i][j - 1] = '-'; } } } if(testArray[i][parameter] < 0) { for(int m = 0; m < parameter - 1; m ++) { testOperator[i][m] = true; } i --; } } quizArea.setText("\n Question Number 1 \n"); for(int n = 0; n < parameter; n ++) { if(n == 0) { quizArea.append(" " + testArray[0][0] + " "); continue; } quizArea.append(testOperator2[0][n - 1] + " " + testArray[0][n] + " "); } quizArea.append("= ?"); enterButton.setEnabled(true); } catch(Exception e) { quizArea.setFont(new Font("SansSerif", Font.PLAIN, 20)); quizArea.append("\n\nPlease input the right parameter!"); e.printStackTrace(); } } }); startButton.setToolTipText("Start Game"); constraints.gridwidth = 1; constraints.gridx = 0; constraints.gridy = 3; constraints.ipadx = 0; constraints.ipady = 0; gridBag.setConstraints(startButton, constraints); container.add(startButton); //下一题 nextButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ae) { try { quizArea.setText("\n Question Number " + ++count + "\n"); -- count; for(int n = 0; n < parameter; n ++) { if(n == 0) { quizArea.append(" " + testArray[count][0] + " "); continue; } quizArea.append(testOperator2[count][n - 1] + " " + testArray[count][n] + " "); } quizArea.append("= ?"); nextButton.setEnabled(false); enterButton.setEnabled(true); } catch(Exception e) { e.printStackTrace(); } } }); nextButton.setToolTipText("Go to next question"); constraints.gridx = 1; constraints.gridy = 3; constraints.ipadx = 0; constraints.ipady = 0; gridBag.setConstraints(nextButton, constraints); container.add(nextButton); //提交 enterButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ae) { try { if(Integer.parseInt(submitBox.getText()) == testArray[count][parameter]) { quizArea.setText("\n Congratulations!" + "\n You are right!"); ++ correct; } else { quizArea.setText("\n Sorry, you are wrong!\n" + " Correct answer is: " + testArray[count][parameter]); } ++ count; submitBox.setText(""); nextButton.setEnabled(true); enterButton.setEnabled(false); if(count == amount) { timeEnd = new Date(); timerEnd = timeEnd.getTime(); timerEnd -= timerBegin; quizArea.setText("\n Game Ends! Score : " + correct + "\n Time elapsed: " + (int)(timerEnd/1000)+ " seconds"); nextButton.setEnabled(false); enterButton.setEnabled(false); } } catch(Exception e) { e.printStackTrace(); } } }); enterButton.setToolTipText("Submit your answer and check"); constraints.gridx = 2; constraints.gridy = 3; constraints.ipadx = 0; constraints.ipady = 0; gridBag.setConstraints(enterButton, constraints); container.add(enterButton); //Row 5:输入区域 constraints.gridwidth = 3; constraints.gridx = 0; constraints.gridy = 4; constraints.