java - 为什么我的 java 应用程序模糊？

Question

<分区>

Answer 1

使用 layout manager以减轻上面显示的工件。下面的例子nests一个 JPanel 在另一个中。

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;

public class DownloadManager {

    private JFrame frame;
    private JTable table;
    private JTextField txtUrl;

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

    public DownloadManager() {
        initialize();
    }

    private void initialize() {
        frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        table = new JTable() {
            @Override
            public Dimension getPreferredScrollableViewportSize() {
                return new Dimension(320, 240);
            }
        };
        frame.add(new JScrollPane(table), BorderLayout.CENTER);
        txtUrl = new JTextField(12);
        txtUrl.setColumns(10);
        JButton btnDownload = new JButton("Download");
        btnDownload.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent arg0) {
            }
        });
        JPanel panel = new JPanel();
        panel.add(txtUrl);
        panel.add(btnDownload);
        frame.add(panel, BorderLayout.NORTH);
        frame.pack();
    }
}