Question

我不知道为什么我的JFrame没有显示，而且它真的让我烦恼，我觉得我错过了一些简单的事情，而我却没有看到它。所以任何帮助都会很棒！

这是代码：

import java.awt.*;
import java.awt.EventQueue;
import javax.swing.*;
import javax.swing.GroupLayout.*;

public class Lorenzo_ChatClient_class extends JFrame {

private JPanel contentPane;
private JTextField textField;
private JTextField textField_1;

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

/** Create the frame. */
public Lorenzo_ChatClient_class() {
    //setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setBounds(100, 100, 450, 300);
    JFrame frame = new JFrame();
    frame.setSize(100,100);

    contentPane = new JPanel();
    contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
    setContentPane(contentPane);
    contentPane.setLayout(null);

    textField_1 = new JTextField();
    textField_1.setBounds(0, 244, 450, 34);
    contentPane.add(textField_1);
    textField_1.setColumns(10);

    JButton btnNewButton = new JButton("Send");
    btnNewButton.setBounds(351, 6, 99, 122);
    contentPane.add(btnNewButton);

    JButton btnNewButton_1 = new JButton("Quit");
    btnNewButton_1.setBounds(351, 124, 99, 122);
    contentPane.add(btnNewButton_1);

    JTextArea textArea_1 = new JTextArea();
    textArea_1.setBorder(UIManager.getBorder("EditorPane.border"));
    textArea_1.setBounds(6, 6, 345, 240);
    contentPane.add(textArea_1);

    JTextArea textArea = new JTextArea();

    textField = new JTextField();
    textField.setColumns(10);


}
}

Answer 1

显然，我过快地阅读了你的代码，因为你确实有Lorenzo_ChatClient_class扩展JFrame。这大大改变了解决方案。

我认为你的主要方法看起来很好。你不应该在构造函数中调用可覆盖的方法;它导致了很多错误。尝试将代码更改为：

import java.awt.*;
import java.awt.EventQueue;
import javax.swing.*;
import javax.swing.GroupLayout.*;
import javax.swing.border.*;

class Lorenzo_ChatClient_class extends JFrame {
private JPanel contentPane;
private JTextField textField;
private JTextField textField_1;

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

public Lorenzo_ChatClient_class() {
    super();
    frameSetup();
    setVisible(true); // or just keep it in your main method
}

private void frameSetup() {
    this.setBounds(100, 100, 450, 300);
    this.setSize(100, 100);
    this.contentPane = new JPanel();
    contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
    setContentPane(contentPane);
    contentPane.setLayout(null);

    textField_1 = new JTextField();
    textField_1.setBounds(0, 244, 450, 34);
    contentPane.add(textField_1);
    textField_1.setColumns(10);

    JButton btnNewButton = new JButton("Send");
    btnNewButton.setBounds(351, 6, 99, 122);
    contentPane.add(btnNewButton);

    JButton btnNewButton_1 = new JButton("Quit");
    btnNewButton_1.setBounds(351, 124, 99, 122);
    contentPane.add(btnNewButton_1);

    JTextArea textArea_1 = new JTextArea();
    textArea_1.setBorder(UIManager.getBorder("EditorPane.border"));
    textArea_1.setBounds(6, 6, 345, 240);
    contentPane.add(textArea_1);

    JTextArea textArea = new JTextArea();

    textField = new JTextField();
    textField.setColumns(10);
    }
}

我只是尝试过，这对我有用，虽然它是一个小框架。不确定setbounds(100, 100, 450, 300)之后是setSize(100,100)紧随其后的原因。您将大小设置为450x300，然后立即将大小重置为100x100。我删除了setSize(100, 100)行，JFrame打开了很多。

Answer 2

在您的主要方法中，

Lorenzo_ChatClient_class frame = new Lorenzo_ChatClient_class();

在你的构造函数中，

setBounds(100, 100, 450, 300);
JFrame frame = new JFrame();
frame.setSize(100,100);

You have taken class reference and JFrame names are same "frame".

JFrame不显示，没有显示任何内容

2 个答案: