java将构造函数类与am主类相结合

Question

有人能指导我如何将这两个类合并到一个文件中吗？一个是构造函数类，另一个是主类

谢谢,

主要类别：

public class JHelloDemo
{
   public static void main(String[] args)
   {
      JHelloFrame frame = new JHelloFrame();
      frame.setVisible(true);
   }
}

构造函数类：

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class JHelloFrame extends JFrame implements ActionListener{
   JLabel question = new JLabel("What is your name?");
   Font bigFont = new Font("Arial", Font.BOLD, 16);
   JTextField answer = new JTextField(10);
   JButton pressMe = new JButton("Press me");
   JLabel greeting = new JLabel("");
   final int WIDTH = 275;
   final int HEIGHT = 225;
   public JHelloFrame(){
      super("Hello Frame");
      setSize(WIDTH, HEIGHT);
      setLayout(new FlowLayout());
      question.setFont(bigFont);
      greeting.setFont(bigFont);
      add(question);
      add(answer);
      add(pressMe);
      add(greeting);
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      pressMe.addActionListener(this);
      }
   @Override
   public void actionPerformed(ActionEvent e){
      String name = answer.getText();
      String greet = "Hello, " + name;
      greeting.setText(greet);
   }
}

Answer 1

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class JHelloFrame extends JFrame implements ActionListener{
   JLabel question = new JLabel("What is your name?");
   Font bigFont = new Font("Arial", Font.BOLD, 16);
   JTextField answer = new JTextField(10);
   JButton pressMe = new JButton("Press me");
   JLabel greeting = new JLabel("");
   final int WIDTH = 275;
   final int HEIGHT = 225;
   public JHelloFrame(){
      super("Hello Frame");
      setSize(WIDTH, HEIGHT);
      setLayout(new FlowLayout());
      question.setFont(bigFont);
      greeting.setFont(bigFont);
      add(question);
      add(answer);
      add(pressMe);
      add(greeting);
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      pressMe.addActionListener(this);
      }
   @Override
   public void actionPerformed(ActionEvent e){
      String name = answer.getText();
      String greet = "Hello, " + name;
      greeting.setText(greet);
   }

   public static void main(String[] args)
   {
      JHelloFrame frame = new JHelloFrame();
      frame.setVisible(true);
   }
}

好了

Answer 2

您可以简单地将main（）方法移动到JHelloFrame，这就是问题的答案。然而，您现有的设计分离了关注点，所以我将不讨论它

顺便说一句，你应该包装框架。在Runnable中设置可见（true），并将其传递给EventQueue。调用器（）。有关更多解释，请参见this question