java 鼠标感应问题_Java相关

java 鼠标感应问题

要求写一个程式，当鼠标在左边程式窗口时背景色变成红色，当鼠标指在右边程式窗口时背景色变成绿色。

希望高手可以写出来给我这个新手看看，我刚接触java一个礼拜，基本什么也不懂，谢谢大家帮忙

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----------------解决方案--------------------------------------------------------
是不是要这样的效果？

程序代码：

import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Toolkit;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JFrame;
import javax.swing.JLabel;

public class MouseEventTest extends JFrame{
    private Container container;
    private JLabel label1,label2;

    public MouseEventTest(){
        super("MouseEventTest");
        container = getContentPane();

        label1 = new JLabel("绿色");
        label1.addMouseListener(
                new MouseAdapter(){
                    public void mouseEntered(MouseEvent event){
                        container.setBackground(Color.GREEN);
                    }
                    public void mouseExited(MouseEvent event){
                            container.setBackground(Color.WHITE);
                        }
                }
                );
        label2 = new JLabel("红色");
        label2.addMouseListener(
                new MouseAdapter(){
                    public void mouseEntered(MouseEvent event){
                        container.setBackground(Color.RED);
                    }
                    public void mouseExited(MouseEvent event){
                            container.setBackground(Color.WHITE);
                        }
                }
                );
        container.setLayout(new FlowLayout());
        container.add(label1);
        container.add(label2);

        setSize(400,400);
        setResizable(false);
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        Dimension frameSize = getSize();
        setLocation((screenSize.width - frameSize.width)/2,(screenSize.height - frameSize.height)/2);
        setVisible(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        new MouseEventTest();
    }
}

----------------解决方案--------------------------------------------------------
差不多了，但是为什么两个方框特别小？？我想要鼠标移到整个窗口的左边和右边，不知道如何改进，请指教，谢谢
----------------解决方案--------------------------------------------------------
这个可以了

程序代码：

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JFrame;
import javax.swing.JLabel;

public class MouseEventTest extends JFrame{
    private Container container;
    private JLabel label1,label2;

    public MouseEventTest(){
        super("MouseEventTest");
        container = getContentPane();

        label1 = new JLabel("绿色",javax.swing.SwingConstants.CENTER);
        label1.addMouseListener(
                new MouseAdapter(){
                    public void mouseEntered(MouseEvent event){
                        container.setBackground(Color.GREEN);
                    }
                    public void mouseExited(MouseEvent event){
                            container.setBackground(Color.WHITE);
                        }
                }
                );
        label2 = new JLabel("红色",javax.swing.SwingConstants.CENTER);
        label2.addMouseListener(
                new MouseAdapter(){
                    public void mouseEntered(MouseEvent event){
                        container.setBackground(Color.RED);
                    }
                    public void mouseExited(MouseEvent event){
                            container.setBackground(Color.WHITE);
                        }
                }
                );
        container.add(label1,BorderLayout.WEST);
        container.add(label2,BorderLayout.EAST);

        setSize(400,400);
        setResizable(false);
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        Dimension frameSize = getSize();
        setLocation((screenSize.width - frameSize.width)/2,(screenSize.height - frameSize.height)/2);
        label1.setPreferredSize(new Dimension(200,400));
        label2.setPreferredSize(new Dimension(200,400));
        setVisible(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        new MouseEventTest();
    }
}

----------------解决方案--------------------------------------------------------
动作事件选项事件鼠标移动事件鼠标事件键盘事件组件焦点事件调整事件组件改变事件窗口事件都记住就好了
----------------解决方案--------------------------------------------------------