重新着色特定部分

Question

我一直在尝试为JList上的项目重新着色，经过研究和尝试，我知道了！

这确实将整个行重新着色为所传递的颜色。

这是代码：

import java.awt.Color;
import java.awt.Component;
import java.awt.FlowLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.DefaultListCellRenderer;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JScrollPane;

public class Main extends JFrame {

    public Main() {
        getContentPane().setLayout(new FlowLayout());

        final JList list = new JList(new Colorable[] { new ColoredItem("Item 1", Color.yellow),
                new ColoredItem("Item 2"), new ColoredItem("Item 3", Color.blue), new ColoredItem("Item 4", Color.red),
                new ColoredItem("Item 5", Color.green) });

        list.setCellRenderer(new ColoredCellRenderer());
        getContentPane().add(new JScrollPane(list));

        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent event) {
                System.exit(0);
            }
        });

        setSize(200, 300);
    }

    public static void main(String[] args) {
        (new Main()).show();
    }
}

class ColoredCellRenderer extends DefaultListCellRenderer {
    public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected,
            boolean cellHasFocus) {
        setText((value == null) ? "" : value.toString());

        System.out.println(value.toString());
        Color c = ((Colorable) value).getColor();
        if (isSelected) {
            setBackground(list.getSelectionBackground());
            setForeground(c);
        } else {
            setBackground(list.getBackground());
            setForeground(c);
        }

        setEnabled(list.isEnabled());
        setFont(list.getFont());

        return this;
    }
}

class ColoredItem implements Colorable {
    Object object;
    Color color;

    public ColoredItem(Object object, Color color) {
        this.object = object;
        this.color = color;
    }

    ColoredItem(Object object) {
        this(object, Color.black);
    }

    public Color getColor() {
        return color;
    }

    public void setColor(Color color) {
        this.color = color;
    }

    public String toString() {
        return object.toString();
    }
}

interface Colorable {
    public Color getColor();

    public void setColor(Color c);
}

但是这不是我想要的样子，我只想从要渲染的文本中选择一个特定的部分，在这里用数字来表示。我该如何实现呢？