为对象创建运行toString以外的方法的自定义JList

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

public class CustomJListDemo extends JFrame {
    public CustomJListDemo() {
        setTitle("Custom JList Demo");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // 创建自定义的JList
        JList<Person> jList = new JList<>();
        jList.setCellRenderer(new PersonListCellRenderer());

        // 创建列表项数据
        Person[] persons = {
                new Person("John", 25),
                new Person("Alice", 30),
                new Person("Bob", 35)
        };

        // 设置列表数据
        jList.setListData(persons);

        // 将JList添加到窗口中
        getContentPane().add(new JScrollPane(jList));

        pack();
        setLocationRelativeTo(null);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> {
            new CustomJListDemo().setVisible(true);
        });
    }
}

// 自定义列表项的数据类
class Person {
    private String name;
    private int age;

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    // 自定义的方法，用于返回列表项的显示内容
    public String getDisplayText() {
        return name + " (" + age + " years old)";
    }
}

// 自定义列表项的渲染器
class PersonListCellRenderer extends JLabel implements ListCellRenderer<Person> {
    public PersonListCellRenderer() {
        setOpaque(true);
    }

    @Override
    public Component getListCellRendererComponent(JList<? extends Person> list, Person value, int index, boolean isSelected, boolean cellHasFocus) {
        setText(value.getDisplayText());

        // 根据选中状态设置背景色和前景色
        if (isSelected) {
            setBackground(list.getSelectionBackground());
            setForeground(list.getSelectionForeground());
        } else {
            setBackground(list.getBackground());
            setForeground(list.getForeground());
        }

        return this;
    }
}