随机颜色游戏，数组和输入

Question

所以我遇到了一些麻烦。我似乎无法弄清楚分配随机颜色的问题（请参阅注释掉的部分）。还有关于如何在正确回答时从上一个问题中删除文本的任何建议？任何帮助将不胜感激。

游戏驱动程序类

public class MemoryGame {
public static void main(String[] args) {
   Questions q = new Questions();

   }
}

---

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.Random;
public class Questions{
Random r = new Random();
private JFrame mainwindow;
private JLabel label1;
private JTextField txtQ1;
int num = 1;
String[] solution = new String[5];
String[] colors = {"red","green","blue","yellow","brown","black","purple","white","orange","grey"};
//for (int i = 0; i < solution.length; i++)
// {
//    solution[i] = colors[r.nextInt(10)];
//}

public Questions()
{
    JOptionPane.showMessageDialog(null,"How good is your memory?nTry to memorize this color sequence:n"+solution);
    createContents();
    mainwindow.setVisible(true);
}
private void createContents()
{
    mainwindow = new JFrame();
    mainwindow.setSize(600, 400);
    mainwindow.setTitle("Memory Game");
    mainwindow.setDefaultCloseOperation(mainwindow.EXIT_ON_CLOSE);
    mainwindow.setLayout(new FlowLayout());
    label1 = new JLabel();
    txtQ1 = new JTextField(15);
    label1.setText("Enter color number: "+num);
    //Add Action to text box
    txtQ1.addActionListener(new QuestionListener());
    mainwindow.add(label1);
    mainwindow.add(txtQ1);

}
public class QuestionListener implements ActionListener
{
    public void actionPerformed (ActionEvent e)
    {

        String guess = "";
        guess = txtQ1.getText();
        if (colors[num-1].equalsIgnoreCase(guess))
        {
            System.out.println("Congratulations continue to next question.");
            num++;
            label1.setText("Enter color number: "+num);
        }
        else
        {
            System.out.println("Sorry wrong color.");
        }
        if (num == 6)
        {
            label1.setText("Congratulations, Your memory is perfect");
            txtQ1.setVisible(false);
        }

    }
}

}

Answer 1

您需要将该循环放在方法或构造函数中。像这样：

public Questions()
{
    for (int i = 0; i < solution.length; i++)
    {
        solution[i] = colors[r.nextInt(10)];
    }
    JOptionPane.showMessageDialog(null,"How good is your memory?nTry to memorize this color sequence:n"+solution);
    createContents();
    mainwindow.setVisible(true);
}

另外你可能想使用

JOptionPane.showMessageDialog(null,"How good is your memory?nTry to memorize this color sequence:n" + Arrays.toString(solution));