java - 如何让我的琐事答案与我的问题保持在随机数组中？

Question

我正在制作一个多项选择琐事游戏，我的问题在一个数组中，每次启动或回答问题时都会随机化。我不确定我的多项选择答案是否会在它们位于数组中时弹出相关问题并将它们随机分配给 JButtons？

我制作了 JButton 占位符，并且每次加载新问题时数组中的问题都在工作和随机化，但我不确定如何处理数组中每个随机问题的答案。

随机数组问题生成器

import java.util.Random;

public class QuestionArray {

    private static String[][] questions = new String[30][4];

    // fill 2D array with questions
    public static void fillArray() {

        // Kindergarten math
        questions[0][0] = "9 - 2 =";
        questions[1][0] = "6 + 3 =";
        questions[2][0] = "4 + 4 =";
        questions[3][0] = "2 + 7 =";
        questions[4][0] = "5 + 4 =";

        // Kindergarten science
        questions[0][1] = "What sound does a dog make?";
        questions[1][1] = "What do caterpillars become?";
        questions[2][1] = "What color is the grass?";
        questions[3][1] = "What animal goes \"Bwak!\"?";
        questions[4][1] = "All birds have which body part?";

        // Kindergarten history
        questions[0][2] = "In what state do you live?";
        questions[1][2] = "What colors make up the American flag?";
        questions[2][2] = "What type of animal is the bald eagle?";
        questions[3][2] = "How many red stripes are on the American flag?";
        questions[4][2] = "How many white stripes are on the American flag?";

        // Kindergarten English
        questions[0][3] = "Which color is spelt right?";
        questions[1][3] = "Which animal is spelt right?";
        questions[2][3] = "Select the missing letter. B_rd";
        questions[3][3] = "Select the missing number. 1 2 _ 4 5";
        questions[4][3] = "A T-Rex is a:";

        // 1st grade math
        questions[5][0] = "Is 3 an odd or even number?";
        questions[6][0] = "Which number is larger, 8 or 2?";
        questions[7][0] = "Which numbers are missing? 21 22 23 _ 25 26 _";
        questions[8][0] = "2 + ? = 5";
        questions[9][0] = "9 - 6 = ";

        // 1st grade science
        questions[5][1] = "Which is a vegetable?";
        questions[6][1] = "If it is snowing, is it hot or cold outside?";
        questions[7][1] = "How many fingers and toes do you have in total?";
        questions[8][1] = "How many legs do spiders have?";
        questions[9][1] = "Which animal lives in the sea?";

        // 1st grade history
        questions[5][2] = "How many states are in America?";
        questions[6][2] = "How many stars are on the American flag?";
        questions[7][2] = "At school, you sing the Pledge of _____?";
        questions[8][2] = "What is a mayor?";
        questions[9][2] = "Who was the 1st American President?";

        // 1st grade English
        questions[5][3] = "What are vowels?";
        questions[6][3] = "How many consonats does the word \"sunflower\" have?";
        questions[7][3] = "What is the correct spelling?";
        questions[8][3] = "Which is spelt correctly?";
        questions[9][3] = "What are the 5 W's?";

        // 2nd grade math
        questions[10][0] = "98 - 54 =";
        questions[11][0] = "121 + 157 =";
        questions[12][0] = "The Zoo has 6 rhinos and 9 wolves. How many animals are there?";
        questions[13][0] = "Will has 2 quarters and 7 pennies. How much money does Will have?";
        questions[14][0] = "73 - 21 = ";

        // 2nd grade science
        questions[10][1] = "What do plants need to grow?";
        questions[11][1] = "How many planets are in our solar system?";
        questions[12][1] = "How many layers make up the Earth?";
        questions[13][1] = "What part of the water cycle is rain?";
        questions[14][1] = "A warm-blooded vertebrate with fur is a ___?";

        // 2nd grade history
        questions[10][2] = "Who delivered the \"I have a dream\" speech?";
        questions[11][2] = "What are the four cardinal directions?";
        questions[12][2] = "What are the three branches of government?";
        questions[13][2] = "In which country were the famous pyraminds built?";
        questions[14][2] = "In which city is the Statue of Liberty?";

        // 2nd grade English
        questions[10][3] = "What punctuation is needed for this sentence? \"Who am I\"";
        questions[11][3] = "Which is spelt correctly?";
        questions[12][3] = "Similes use ___.";
        questions[13][3] = "Complete the sentence: \"Ava felt sick ___ lunch.\"";
        questions[14][3] = "Choose the adverb: \"The girl waited patiently.\"";

        // 3rd grade math
        questions[15][0] = "How many sides does a hexagon have?";
        questions[16][0] = "11 x 0 =";
        questions[17][0] = "10 x 4 =";
        questions[18][0] = "A lion eats 5 steaks daily. How many steaks does it eat in 4 days?";
        questions[19][0] = "778 - 291 =";

        // 3rd grade science
        questions[15][1] = "On which planet do we live?";
        questions[16][1] = "What mineral can be found in pennies?";
        questions[17][1] = "Which planet is known for its large ring that circles it?";
        questions[18][1] = "Which animal does NOT have a vertebra? ";
        questions[19][1] = "Which is of the following is NOT an insect?";

        // 3rd grade history
        questions[15][2] = "Who was the President during the Civil War? ";
        questions[16][2] = "Who is on the $5 bill?";
        questions[17][2] = "What is the capitol of Virginia?";
        questions[18][2] = "Who is the second president of the United States of America?";
        questions[19][2] = "Which northern state is by itself and connected to Canada?";

        // 3rd grade English
        questions[15][3] = "What is the plural form of cactus?";
        questions[16][3] = "Apply the appropriate pronoun: Jennifer told me that ___ had to go.";
        questions[17][3] = "Apply the appropriate pronoun: The kids asked ___  parents to join.";
        questions[18][3] = "Homophones: The dog wanted to play outside ___.";
        questions[19][3] = "Homophones: ___ 3rd graders just like you!";

        // 4th grade math
        questions[20][0] = "3/7 + 1/7 =";
        questions[21][0] = "9/3 =";
        questions[22][0] = "10 x 10 =";
        questions[23][0] = "99/9 =";
        questions[24][0] = "Ned has 3 bananas and 3 apples. What fraction of the fruit is bananas?";

        // 4th grade science
        questions[20][1] = "How many moons does Earth have?";
        questions[21][1] = "Which organism is lowest on the food chain?";
        questions[22][1] = "What keeps us on the ground and keeps us from floating into the sky?";
        questions[23][1] = "What is Magma?";
        questions[24][1] = "Which planet is the 7th away from the sun?";

        // 4th grade history
        questions[20][2] = "How many seas are there";
        questions[21][2] = "Who led slaves to freedom via the Underground Railroad?";
        questions[22][2] = "Which two countries were part of the Space Race?";
        questions[23][2] = "How many continents are there?";
        questions[24][2] = "What year did man set foot on the moon for the first time in history?";

        // 4th grade English
        questions[20][3] = "What is the suffix of the word \"Rapidly\"?";
        questions[21][3] = "What is the root word of the word \"Beautiful\"?";
        questions[22][3] = "Place the comma: Mom started cutting up carrots, celery and peppers.";
        questions[23][3] = "Select the best word: ___ umbrella is useful for when it rains.";
        questions[24][3] = "Select the best word: Mom waited for more than ___ hour in traffic.";

        // 5th grade math
        questions[25][0] = "11 x 23 =";
        questions[26][0] = "10 x 17 =";
        questions[27][0] = "239 x 53 =";
        questions[28][0] = "Improper Fraction: 11/5";
        questions[29][0] = "Gary needs 1 1/3 cups of milk for 1 meal. How many cups for 3 meals?";

        // 5th grade science
        questions[25][1] = "What is the term for when a liquid changes into gas?";
        questions[26][1] = "What do rings in a tree’s trunk say about the tree?";
        questions[27][1] = "How many moons does Mars have?";
        questions[28][1] = "What are the 4 soil types?";
        questions[29][1] = "Which has the highest rating on the hardness scale?";

        // 5th grade history
        questions[25][2] = "What was the first US state?";
        questions[26][2] = "How long was the United States in World War 2?";
        questions[27][2] = "What was World War I originally called?";
        questions[28][2] = "What happened at the Boston Massacre?";
        questions[29][2] = "Which African American leader helped lead the boycott of city buses?";

        // 5th grade English
        questions[25][3] = "Select the subject of the following sentence: \"I saw an albino crocodile!\"";
        questions[26][3] = "Select the predicate of the following sentence: \"The cats meow.\"";
        questions[27][3] = "Select the prepositional phrase: \"Before class, Josh asked for a pen.\"";
        questions[28][3] = "Where does the comma belong? \"Last winter school got canceled twice.\"";
        questions[29][3] = "Select the conjunctions: \"I like cooking and eating, but not doing dishes.\"";
    }

    // return question based on grade and topic
    public static String getQuestArray(String grade, String topic) {
        Random rand = new Random();
        int row = 0;
        int col = 0;

        if ( grade == "K" && topic == "math")
        {
            row = rand.nextInt(5);
            col = 0;
        }
        else if ( grade == "K" && topic == "science")
        {
            row = rand.nextInt(5);
            col = 1;
        }
        else if ( grade == "K" && topic == "history")
        {
            row = rand.nextInt(5);
            col = 2;
        }
        else if ( grade == "K" && topic == "english")
        {
            row = rand.nextInt(5);
            col = 3;
        }
        else if ( grade == "1" && topic == "math")
        {
            row = rand.nextInt(5) + 5;
            col = 0;
        }
        else if ( grade == "1" && topic == "science")
        {
            row = rand.nextInt(5) + 5;
            col = 1;
        }
        else if ( grade == "1" && topic == "history")
        {
            row = rand.nextInt(5) + 5;
            col = 2;
        }
        else if ( grade == "1" && topic == "english")
        {
            row = rand.nextInt(5) + 5;
            col = 3;
        }
        else if ( grade == "2" && topic == "math")
        {
            row = rand.nextInt(5) + 10;
            col = 0;
        }
        else if ( grade == "2" && topic == "science")
        {
            row = rand.nextInt(5) + 10;
            col = 1;
        }
        else if ( grade == "2" && topic == "history")
        {
            row = rand.nextInt(5) + 10;
            col = 2;
        }
        else if ( grade == "2" && topic == "english")
        {
            row = rand.nextInt(5) + 10;
            col = 3;
        }
        else if ( grade == "3" && topic == "math")
        {
            row = rand.nextInt(5) + 15;
            col = 0;
        }
        else if ( grade == "3" && topic == "science")
        {
            row = rand.nextInt(5) + 15;
            col = 1;
        }
        else if ( grade == "3" && topic == "history")
        {
            row = rand.nextInt(5) + 15;
            col = 2;
        }
        else if ( grade == "3" && topic == "english")
        {
            row = rand.nextInt(5) + 15;
            col = 3;
        }
        else if ( grade == "4" && topic == "math")
        {
            row = rand.nextInt(5) + 20;
            col = 0;
        }
        else if ( grade == "4" && topic == "science")
        {
            row = rand.nextInt(5) + 20;
            col = 1;
        }
        else if ( grade == "4" && topic == "history")
        {
            row = rand.nextInt(5) + 20;
            col = 2;
        }
        else if ( grade == "4" && topic == "english")
        {
            row = rand.nextInt(5) + 20;
            col = 3;
        }
        else if ( grade == "5" && topic == "math")
        {
            row = rand.nextInt(5) + 25;
            col = 0;
        }
        else if ( grade == "5" && topic == "science")
        {
            row = rand.nextInt(5) + 25;
            col = 1;
        }
        else if ( grade == "5" && topic == "history")
        {
            row = rand.nextInt(5) + 25;
            col = 2;
        }
        else if ( grade == "5" && topic == "english")
        {
            row = rand.nextInt(5) + 25;
            col = 3;
        }

        String questPass = questions[row][col];

        return questPass;

    }

}

回答 JButtons

import java.awt.EventQueue;
import java.awt.Font;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JButton;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.SwingConstants;

@SuppressWarnings("serial")
public class Question extends JFrame {

    private JFrame frmQuestion;

    /**
     * Launch the application.
     */
    public static void main(String grade, String topic) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    Question window = new Question(grade, topic);
                    window.frmQuestion.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the application.
     * @param topic 
     * @param grade 
     * @param questions 
     */
    public Question(String grade, String topic) {
        initialize(grade, topic);
    }

    /**
     * Initialize the contents of the frame.
     * @param topic 
     * @param grade 
     */
    private void initialize(String grade, String topic) {
        String questPassed = QuestionArray.getQuestArray(grade, topic);

        frmQuestion = new JFrame();
        frmQuestion.setTitle("Trivia");
        frmQuestion.setBounds(200, 200, 450, 300);
        frmQuestion.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frmQuestion.getContentPane().setLayout(null);

        JLabel lblQuestionHere = new JLabel(questPassed, SwingConstants.CENTER);
        lblQuestionHere.setFont(new Font("Arial", Font.BOLD, 12));
        lblQuestionHere.setBounds(10, 42, 412, 27);
        frmQuestion.getContentPane().add(lblQuestionHere);

        JButton btnAnswer = new JButton("Answer 1");
        btnAnswer.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                Answer.main(null);
                frmQuestion.dispose();
            }
        });
        btnAnswer.setFont(new Font("Arial", Font.BOLD, 12));
        btnAnswer.setBounds(53, 80, 147, 75);
        frmQuestion.getContentPane().add(btnAnswer);

        JButton btnAnswer_1 = new JButton("Answer 2");
        btnAnswer_1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                Answer.main(null);
                frmQuestion.dispose();
            }
        });
        btnAnswer_1.setFont(new Font("Arial", Font.BOLD, 12));
        btnAnswer_1.setBounds(233, 80, 147, 75);
        frmQuestion.getContentPane().add(btnAnswer_1);

        JButton btnAnswer_2 = new JButton("Answer 3");
        btnAnswer_2.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                Answer.main(null);
                frmQuestion.dispose();
            }
        });
        btnAnswer_2.setFont(new Font("Arial", Font.BOLD, 12));
        btnAnswer_2.setBounds(53, 175, 147, 75);
        frmQuestion.getContentPane().add(btnAnswer_2);

        JButton btnAnswer_3 = new JButton("Answer 4");
        btnAnswer_3.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                Answer.main(null);
                frmQuestion.dispose();
            }
        });
        btnAnswer_3.setFont(new Font("Arial", Font.BOLD, 12));
        btnAnswer_3.setBounds(233, 175, 147, 75);
        frmQuestion.getContentPane().add(btnAnswer_3);

        JMenuBar menuBar = new JMenuBar();
        menuBar.setBounds(0, 0, 434, 23);
        frmQuestion.getContentPane().add(menuBar);

        JMenu menu = new JMenu("File");
        menuBar.add(menu);

        JMenuItem menuItem = new JMenuItem("Main Menu");
        menuItem.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                Launcher.main(null);
                frmQuestion.dispose();
            }
        });
        menu.add(menuItem);

        JMenuItem menuItem_1 = new JMenuItem("Quit");
        menuItem_1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                frmQuestion.dispose();
            }
        });
        menu.add(menuItem_1);

        JMenu menu_1 = new JMenu("Help");
        menuBar.add(menu_1);

        JMenuItem menuItem_2 = new JMenuItem("How to Play");
        menuItem_2.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                HowToPlay howTo = new HowToPlay();
                howTo.setLocation( 250, 150 );
                howTo.setSize( 450, 300 );
                howTo.setVisible(true);
            }
        });
        menu_1.add(menuItem_2);
    }
}

琐事游戏根据成绩和主题从数组中询问随机问题，然后分配给 JButton 的答案告诉正确或不正确。

标签： javaarraysoop