GUI學習筆記——04更改背景板顏色，鼠標進入事件

視頻鏈接

package test;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class test5 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		Frame f = new Frame("更改背景色");
		f.setBounds(400,200,400,300);
		f.setLayout(new FlowLayout());
		
		
		//創建按鈕
		Button red = new Button("紅色");
		Button blue = new Button("藍色");
		Button green = new Button("綠色");
		
		f.add(red);
		f.add(blue);
		f.add(green);
		//動作事件
		/*red.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				f.setBackground(Color.red);
			}
			
		});*/
		//鼠標點擊事件
		/*red.addMouseListener(new MouseAdapter(){
			@Override
			public void  mouseClicked(MouseEvent e)
			{
				f.setBackground(Color.red);
			}
		});*/
		//鼠標進入事件
		red.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseEntered(MouseEvent e) {
				f.setBackground(Color.red);
			}
		});
		red.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseExited(MouseEvent e) {
				f.setBackground(Color.white);
			}
		});
		blue.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseEntered(MouseEvent e) {
				f.setBackground(Color.blue);
			}
		});
		blue.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseExited(MouseEvent e) {
				f.setBackground(Color.white);
			}
		});
		green.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseEntered(MouseEvent e) {
				f.setBackground(Color.green);
			}
		});
		green.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseExited(MouseEvent e) {
				f.setBackground(Color.white);
			}
		});
		
		
		
		
		//設置窗體關閉，可見
		f.setVisible(true);
		//設置窗體關閉
		f.addWindowListener(new WindowAdapter() {
			@Override
			public void windowClosing(WindowEvent e) {
				System.exit(0);
			}
		});
		
	}

}