Mouse monitor, Paintbrush

Simple brush

package Paint;

import java.awt.*;

public class Paint {
    
    public static void main(String[] args) {
    
        new MyPaint().loadFrame();
    }
}
class MyPaint extends Frame {
    
    public void loadFrame(){
    
        setVisible(true);
        setBounds(100,200,600,400);
    }

    // paint brush 
    @Override
    public void paint(Graphics g) {
    
       // The brush needs color , The brush can draw 
    // g.setColor(Color.red);
        g.drawOval(100,200,100,100);
        g.fill3DRect(100,100,100,100,true);

       // g.setColor(Color.GREEN);
        g.fillRect(200,200,100,100);


        // Out of brushes , Restore to the original color 

    }
}

Mouse monitor , Draw points with a brush

package Listener;
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.ArrayList;
import java.util.Iterator;
//1, Create a mouse listener class , Get the current coordinates of the mouse by listening （x,y）, And form a point 
//2, Save this point in the set 
//3, Take out the points in the set with a brush , And present it on the drawing board 
public class MouseListener {
    
    public static void main(String[] args) {
    
        new MyFrame(" Drawing a picture ");
    }
    }

// My own class   Test mouse monitoring events 
class MyFrame extends Frame {
    
    ArrayList points ;
    public MyFrame(String title){
    
        super(title);
        setBounds(100,200,300,300);
        // Save the mouse point 
        points =new ArrayList<>();
        setVisible(true);
        // Refresh the window in real time 
        // Not need it for now validate();
        
        // Mouse monitor , Facing this window 
        this.addMouseListener(new MyMouseListener());
    }

    @Override
    public void paint(Graphics g) {
    
       // Painting requires monitoring mouse events 
        Iterator iterator=points.iterator();
        while(iterator.hasNext()){
    
         Point point=(Point) iterator.next();
         g.setColor(Color.blue);
        // g.drawOval(point.x,point.y,10,10);
         g.fillOval(point.x,point.y,10,10);
        }
    }

    // Add a point to the interface 
    public void addPoint(Point point){
    
        points.add(point);
    }

    // Adapter pattern 
    private class MyMouseListener extends MouseAdapter{
    
        // mouse 
        @Override
        public void mousePressed(MouseEvent e) {
    
            MyFrame myFrame= (MyFrame) e.getSource();
            // Click to generate a point on the interface 
            // This point is the point of the mouse 
            myFrame.addPoint( new Point(e.getX(),e.getY()));
           // new Point(e.getX(),e.getY());

            // Redraw every time you click , Update window 
            myFrame.repaint();
        }
    }
}

Keyboard monitor

class KeyFrame extends Frame {
    
    public KeyFrame()  {
    
        setBounds(100,100,200,200);
        setVisible(true);

        this.addKeyListener(new KeyAdapter() {
      //K It's in capital letters 
            @Override
            public void keyPressed(KeyEvent e) {
    
               int KeyCode=e.getKeyCode(); 
                System.out.println(KeyCode);   // Get the key 16 Base number ASCII code 
               if(KeyCode==KeyEvent.VK_UP){
    
                   System.out.println(" You press the up button ");
               }
            }
        });
    }
}