组件和容器

一、Frame

package GUI;
import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
/**
 * @Auther: 小雷学长
 * @Date: 2022/3/12 - 10:55
 * @Version: 1.8
 */
public class TestFrame {
    public static void main(String[] args) {
        //新建一个窗口
        Frame frame = new Frame("管理系统");
        //需要设置可见性
        frame.setVisible(true);
        //设置窗口大小
        frame.setSize(400, 400);
        //设置背景颜色
        frame.setBackground(new Color(1, 55, 10));
        //弹出的初始位置
        frame.setLocation(200,200);
        //设置大小固定,无法改变大小
        frame.setResizable(true);
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}

package GUI;
import java.awt.*;
/**
 * @Auther: 小雷学长
 * @Date: 2022/3/12 - 11:08
 * @Version: 1.8
 */
public class TestFrame2 {
    public static void main(String[] args) {
        //展示多个窗口
        new MyFrame(100,100,200,200,Color.GREEN);
        new MyFrame(300,100,200,200,Color.GREEN);
        new MyFrame(500,100,200,200,Color.GREEN);
        new MyFrame(700,100,200,200,Color.GREEN);
    }
}
class MyFrame extends Frame {
    //可能存在多个窗口，需要一个计数器
    static int id = 0;
    public MyFrame(int x, int y,int w,int h,Color color) {
        super("MyFrame"+(++id));
        setBounds(x,y,w,h);
        setVisible(true);
        setBackground(color);
    }
}

二、面板Panel

panel不能单独存在，可以看成是一个空间，需要放在Frame上

package GUI;
import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
/**
 * @Auther: 小雷学长
 * @Date: 2022/3/12 - 11:37
 * @Version: 1.8
 */
public class TestPanel {
    public static void main(String[] args) {
        Frame frame = new Frame();
        //布局的概念
        Panel panel = new Panel();
        //需要设置可见性
        frame.setVisible(true);
        //设置布局
        frame.setLayout(null);
        //坐标
        frame.setBounds(300,300,400,400);
        frame.setBackground(new Color(193,3,4));
        //panel设置坐标,相对于frame
        panel.setBounds(30,40,400,500);
        panel.setBackground(new Color(40,61,35));
        //frame.add(panel)
        frame.add(panel);
        //监听事件，监听窗口关闭事件，system.exit(0)
       /* frame.addWindowListener(new WindowListener() {
            @Override
            public void windowOpened(WindowEvent e) {
            }
            @Override
            public void windowClosing(WindowEvent e) {
            }
            @Override
            public void windowClosed(WindowEvent e) {
            }
            @Override
            public void windowIconified(WindowEvent e) {
            }
            @Override
            public void windowDeiconified(WindowEvent e) {
            }
            @Override
            public void windowActivated(WindowEvent e) {
            }
            @Override
            public void windowDeactivated(WindowEvent e) {
            }
        });*/
        //监听事件，监听窗口关闭事件，system.exit(0)
        //适配器模式
        frame.addWindowListener(new WindowAdapter() {
            //窗口点击关闭时要做的事情
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}