Java :如何将框架的背景颜色设置为组合框中相应的选定颜色名称

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class ComboBoxExample {
    public static void main(String[] args) {
        JFrame frame = new JFrame("Color ComboBox Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(300, 200);

        // 创建一个JComboBox对象，并添加选项
        JComboBox<String> colorComboBox = new JComboBox<>();
        colorComboBox.addItem("Red");
        colorComboBox.addItem("Green");
        colorComboBox.addItem("Blue");

        // 设置渲染器，自定义选项的背景颜色
        colorComboBox.setRenderer(new DefaultListCellRenderer() {
            @Override
            public Component getListCellRendererComponent(JList<?> list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
                Component component = super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
                if (value != null) {
                    String colorName = value.toString();
                    Color color = getColorByName(colorName);
                    component.setBackground(color);
                }
                return component;
            }
        });

        // 添加组合框的选中事件监听器
        colorComboBox.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                JComboBox<String> comboBox = (JComboBox<String>) e.getSource();
                String selectedColor = comboBox.getSelectedItem().toString();
                Color color = getColorByName(selectedColor);
                frame.getContentPane().setBackground(color);
            }
        });

        frame.getContentPane().setLayout(new FlowLayout());
        frame.getContentPane().add(colorComboBox);
        frame.setVisible(true);
    }

    // 根据颜色名称获取对应的颜色对象
    private static Color getColorByName(String colorName) {
        switch (colorName) {
            case "Red":
                return Color.RED;
            case "Green":
                return Color.GREEN;
            case "Blue":
                return Color.BLUE;
            default:
                return Color.WHITE;
        }
    }
}