Question

我的JPanel所有设置都有一个工作的JFrame GUI。我正在尝试组合我已经设置和工作的两个不同的代码。第一个代码是JPanel中的文本转换器toUpperCase，第二个代码是Prime Factor（非素数）代码。我一直试图让JPanel为用户输入的任何数字提供Prime Factor的输出。这就是我的......

JPanel代码

public class Prime extends JPanel { 
    private JLabel formattedText;

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.getContentPane().add(new Prime());
        frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        frame.setVisible(true);
    }

    public Prime(){
        setLayout(new BoxLayout(this,BoxLayout.Y_AXIS));
        JPanel panel = new JPanel(); panel.setPreferredSize(new Dimension(640,100));
        JLabel label = new JLabel("Enter a number to check for it's prime number(s).");
        JTextField field = new JTextField("0");
        field.addActionListener(new FieldListener());
        add(label);
        add(field);
        add(panel);


        panel = new JPanel(); panel.setPreferredSize(new Dimension(640,380));
        formattedText = new JLabel();
        panel.add(formattedText);
        add(panel);
    }

    private class FieldListener implements ActionListener {
        public void actionPerformed(ActionEvent event) {
            JTextField field = (JTextField)event.getSource();
                formattedText.setText(field.getText().toUpperCase()); // I know this is wrong... I can't figure out what to change here to get it to pull the code below.
            }
    }
    public class PrimeFactors {

    }
}

这里是Prime Factor代码

public class Temp {

    static int primeCheck = 1;

    public static void main(String[] args) {
        System.out.println("Enter a number whose Prime factors are desired: ");
        Scanner numS = new Scanner(System.in);
        int numPriFac = 0;
        if (numS.hasNextInt()) {
            numPriFac = numS.nextInt();
        }

        System.out.println("All the Prime Factors of the entered number are:");

        for (int tap = 1; tap <= numPriFac; tap++) {
            if (numPriFac % tap == 0) {
                for (int primeTest = 2; primeTest < tap; primeTest++) {
                    if (tap % primeTest == 0) {
                        primeCheck = 1;
                        break;
                    } else {
                        primeCheck = 0;
                    }
                }
                if (primeCheck == 0 || tap == 2) {
                    System.out.print(tap + " ");
                }
            }
        }
    }
}

底部的最后一个PrimeFactors代码只是在我试图让它独立工作时遗留下来的东西。非常感谢任何帮助!!!

Answer 1

第1步：更改第

行

  public static void main(String[] args) {

类似

  public static String primeFactors(int number) {

并使该方法使用提供的参数number，而不是要求输入。

第2步：在primeFactors中创建StringBuilder，并将对System.out.print的所有来电更改为对stringBuilder.append()

的来电

第3步：将stringBuilder.toString()设为primeFactors

的返回值

第4步：更改行

  formattedText.setText(field.getText().toUpperCase());

到

  formattedText.setText(Temp.primeFactors(Integer.parseInt(field.getText())));

我会留下错误处理并输入安全保护。

将Prime因子代码组合到JPanel - Java中

1 个答案: