Question

我正在制作类似于星球大战游戏sabacc的游戏。我正在尝试创建一个已经在屏幕上有三个卡套件的Jtextfield。用户将按下按钮，根据按钮，他们按下卡套装将更改为不同的套装。如果他们获得三个相同的套房，他们就赢了。我在将文本输入屏幕时遇到问题。截至目前，我一直收到一条错误，说静态内容无法引用非静态方法。

以下是主要应用程序的代码：

if

///这就是我的错误！//

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class CardApp extends JFrame implements ActionListener {

    private JButton oneButton, 
                    twoButton, 
                    threeButton;  
    private int width = 25;
    private int height = 15;



    public CardApp() {
        //JPanel boardPanel = new JPanel(new GridLayout(height,width));
        JPanel buttonPanel = new JPanel(new GridLayout(1, 3));
        JTextField TextField = new JTextField(30); 

        Hand settingTheText = new Hand();

        TextField.setText(settingTheText.ListOfCards());

        oneButton = new JButton("1");
        twoButton = new JButton("2");
        threeButton = new JButton("3");


        // Listen for events on each button
        oneButton.addActionListener(this);
        twoButton.addActionListener(this);
        threeButton.addActionListener(this);

        // Add each to the panel of buttons
        buttonPanel.add(oneButton); 
        buttonPanel.add(twoButton); 
        buttonPanel.add(threeButton); 
       // Add everything to a main panel attached to the content pane
        JPanel mainPanel = new JPanel(new BorderLayout());
        getContentPane().add(mainPanel);
        mainPanel.add(TextField, BorderLayout.CENTER);
        mainPanel.add(buttonPanel, BorderLayout.SOUTH);

        setTitle("Sabacc Example by Angela Rucci");
        setSize(375, 200);
        setVisible(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }


    public void actionPerformed(ActionEvent e) {
                int pressed = 0;
                if (e.getSource() == oneButton){
                        pressed = 1;}
                if (e.getSource() == twoButton){
                        pressed = 2;}
                if (e.getSource() == threeButton){
                        pressed = 3;}
                 Hand handObject = new Hand();

这是我得到西装清单的另一个文件

                String screenText = handObject.ListOfCards();
                TextField.setText(screenText);
    }


public static void main(String[] args) {

    CardApp c = new CardApp();


}

}

Answer 1

变量是方法的本地变量。 JTextField TextField仅对CardApp（）可见。如果您希望它可供全班使用，请将其作为私有类成员：

public class CardApp extends JFrame implements ActionListener {

    private JButton oneButton, 
                    twoButton, 
                    threeButton;  
    private int width = 25;
    private private int height = 15;
    // available to all methods
    // better naming convention was JTextfield tf = new JTextField(30);
    // even stackoverflow thinks its a class name :)
    // see the color highlighting
    private JTextField TextField = new JTextField(30);

    public CardApp() {
        //JPanel boardPanel = new JPanel(new GridLayout(height,width));
        JPanel buttonPanel = new JPanel(new GridLayout(1, 3));
        //JTextField TextField = new JTextField(30); 

        Hand settingTheText = new Hand();

        TextField.setText(settingTheText.ListOfCards());
     }
     //
     // code continues here ...
     //
}

在JText字段中创建用户无法在java中编辑的文本

1 个答案: