如何用继承自JFrame图标的图标创建自己的文件（在Java中设置），我自己的文件使用FileOutputStream和ObjectOutputStream

@David是对的，因为主机平台拥有这些

Jframe

JInternalframe

private static final Icon ICON = (Icon) UIManager.get("Internalframe.closeIcon");

其他装饰默认列举
here.

SSCCE:

import java.awt.EventQueue;import java.awt.GridLayout;import javax.swing.BorderFactory;import javax.swing.Icon;import javax.swing.Jframe;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.UIManager;public class InternalframeIcons extends JPanel {    public InternalframeIcons() {        this.setLayout(new GridLayout(0, 1, 5, 5));        this.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));        this.add(createLabel("Internalframe.closeIcon"));        this.add(createLabel("Internalframe.maximizeIcon"));        this.add(createLabel("Internalframe.minimizeIcon"));    }    private JLabel createLabel(String name) {        Icon icon = (Icon) UIManager.get(name);        JLabel label = new JLabel(name, icon, JLabel.CENTER);        label.setHorizontalTextPosition(JLabel.CENTER);        label.setVerticalTextPosition(JLabel.BOTTOM);        return label;    }    private void display() {        Jframe f = new Jframe("InternalframeIcons");        f.setDefaultCloseOperation(Jframe.EXIT_ON_CLOSE);        f.add(this);        f.pack();        f.setLocationRelativeTo(null);        f.setVisible(true);    }    public static void main(String[] args) {        EventQueue.invokeLater(new Runnable() { @Override public void run() {     new InternalframeIcons().display(); }        });    }}