Question

我最近开始使用WindowBuilder for Java进行编程，但我遇到了一个非常恼人的问题，我似乎无法解决这个问题。

问题是在YesOrNo方法完成（第131行）完成之前执行调试（System.out.println（answer）;第133行）。所以它在我的计划中“超前”。

我的代码：

main.java

package me.fractional.main;

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

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.SwingConstants;
import javax.swing.JTextField;

public class main {

GUI go = new GUI();
Studio so = new Studio();

private JFrame frmFractionalc;

static JLabel logo = new JLabel("");
static JButton InputNext = new JButton("Continue");
static JLabel OutputMainText = new JLabel("");
static JTextField InputText = new JTextField();
static JButton InputYes = new JButton("Yes");
static JButton InputNo = new JButton("No");

public static int counter = 1;
public int answer = 2;

public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
        public void run() {
            try {
                main window = new main();
                window.frmFractionalc.setVisible(true);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    });
}

public main() {
    initialize();
    intro();
}

public void Tutorial()
{
    System.out.println("Tutorial");
    OutputMainText.setVisible(true);
    go.OutputMainText("Welcome to! Click Next Turn to Continue.");
}
public void MainMenu()
{
    System.out.println("MainMenu");
}

private void initialize() {
    frmFractionalc = new JFrame();
    frmFractionalc.getContentPane().setBackground(new Color(176, 224, 230));
    frmFractionalc.setBackground(new Color(0, 128, 128));
    frmFractionalc.setTitle("Fractional © - GameDevStory");
    frmFractionalc.setBounds(100, 100, 500, 300);
    frmFractionalc.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frmFractionalc.getContentPane().setLayout(null);

    logo.setHorizontalAlignment(SwingConstants.CENTER);
    logo.setBounds(42, 44, 400, 150);

    frmFractionalc.getContentPane().add(logo);
    frmFractionalc.getContentPane().add(InputNext);
    OutputMainText.setHorizontalAlignment(SwingConstants.CENTER);
    OutputMainText.setBounds(10, 69, 464, 105);

    frmFractionalc.getContentPane().add(OutputMainText);
    frmFractionalc.getContentPane().add(InputText);

    frmFractionalc.getContentPane().add(InputYes);

    frmFractionalc.getContentPane().add(InputNo);



}

public void intro()
{

    logo.setIcon(new ImageIcon(main.class.getResource("/me/fractional/main/logo.png")));
    InputNext.setForeground(new Color(0, 0, 0));
    InputNext.setBounds(200, 239, 89, 23);  

    InputNext.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e) {
            switch(counter)
            {
                case 1:
                    logo.setVisible(false);
                    go.OutputMainText("Welcome to GameDevStudio!");
                    counter = 2;
                    break;
                case 2:
                    go.OutputMainText("Enter a name for your game studio below [10 characters max!]");
                    InputText.setBounds(162, 174, 154, 20);
                    InputText.setColumns(10);
                    InputText.setVisible(true);
                    counter = 3;
                    break;
                case 3:
                    so.setName(InputText.getText());
                    if(so.getName().length() < 1 || so.getName() == null)
                    {
                        go.OutputMainText("Invalid name!");
                        InputText.setVisible(false);
                        counter = 2;
                    }
                    else
                    {
                        go.OutputMainText(so.getName() + ", that's a name I'd use!");
                        InputText.setVisible(false);
                        counter = 4;
                    }
                    break;
                case 4:
                    InputNext.setVisible(false);
                    go.OutputMainText("Would you like to run the tutorial?");

                    answer = go.YesOrNo(1);

                    System.out.println(answer);

                    break;
            }
        }
    });
}

}

GUI.java

package me.fractional.main;

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

import me.fractional.main.main;

public class GUI {

static int returnvalue;

public void OutputMainText(String text)
{
    main.OutputMainText.setText(text);
    main.OutputMainText.setVisible(true);
}
public int YesOrNo(final int option)
{

    main.InputYes.setBounds(112, 239, 89, 23);
    main.InputNo.setBounds(287, 239, 89, 23);


    main.InputYes.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e) {
            returnvalue = 1;
            main.InputYes.setVisible(false);
            main.InputNo.setVisible(false);

            if(option == 1)
            {
                main.OutputMainText.setText("");
            }
        }
    });

    main.InputNo.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e) {
            returnvalue = 0;
            main.InputYes.setVisible(false);
            main.InputNo.setVisible(false);

            if(option == 1)
            {
                main.OutputMainText.setText("");
            }
        }
    });

    return returnvalue;

}

}

Studio.java

package me.fractional.main;

public class Studio {

String s_name;

public String getName()
{
    return s_name;
}
public void setName(String name)
{
    s_name = name;
}
}

Answer 1

Swing是一个事件驱动的环境，这意味着你的程序会为用户生成输入，他们可以随心所欲地与他们互动。

不是像控制台程序那样的线性输入过程，而是通过事件通知用户交互。

这意味着您的YesOrNo方法将在调用任何actionPerformed方法之前返回。

如果由于某种原因需要停止应用程序流程，您只能选择使用某种对话框。

请查看How to use dialogs了解详情

Ps-当你在那里时，你可能想看看How to use layouts，它们会让你在长期错误中生活更轻松

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