add lab11

lab/lab11/Question1/MyFrame.java

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+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		this.setTitle("MyFrame Title");
+		this.setSize(400, 300);
+		// Set the operation of the window when you click to
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		// close
+		this.setLocationRelativeTo(null);
+		BorderLayout fl = new BorderLayout();
+		// Set the layout manager for the frame.
+		this.setLayout(fl);
+		// The first panel
+		JPanel jp = new JPanel();
+		this.add(jp, BorderLayout.PAGE_START);
+		// The second panel
+		MyPanel p = new MyPanel();
+		p.setLayout(new FlowLayout(FlowLayout.CENTER));
+		JButton b1 = new JButton("left");
+		p.add(b1);
+		JButton b2 = new JButton("right");
+		p.add(b2);
+		this.add(p, BorderLayout.CENTER);
+		// Perform drawing and display to the desktop
+		this.setVisible(true);
+	}
+}

lab/lab11/Question1/MyPanel.java

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+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	public MyPanel() {
+		// Anonymous class.
+		this.addMouseListener(new MouseAdapter() {
+			public void mouseClicked(MouseEvent e) {
+				// Check whether the left mouse button is
+				if (e.getButton() == MouseEvent.BUTTON1) {
+					// get the coordinate
+					System.out.println("(" + e.getX() + "," + e.getY() + ")");
+				}
+			}
+		});
+
+	}
+}

lab/lab11/Question1/Start.java

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+public class Start {
+	public static void main(String[] args) {
+		javax.swing.SwingUtilities.invokeLater(new Runnable() {
+			// implements the Runnable interface with a run method
+			@Override
+			public void run() {
+				new MyFrame();
+			}
+		});
+	}
+}

lab/lab11/Question2/MyFrame.java

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+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		this.setTitle("MyFrame Title");
+		this.setSize(400, 300);
+		// Set the operation of the window when you click to close
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLocationRelativeTo(null);
+		BorderLayout fl = new BorderLayout();
+		// Set the layout manager for the frame.
+		this.setLayout(fl);
+		// The first panel
+		JPanel jp = new JPanel();
+		this.add(jp, BorderLayout.PAGE_START);
+		// The second panel
+		MyPanel p = new MyPanel();
+		p.setLayout(new FlowLayout(FlowLayout.CENTER));
+		JButton b1 = new JButton("left");
+		p.add(b1);
+		JButton b2 = new JButton("right");
+		p.add(b2);
+		this.add(p, BorderLayout.CENTER);
+		// Perform drawing and display to the desktop
+		this.setVisible(true);
+	}
+}

lab/lab11/Question2/MyPanel.java

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+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	private int x = -1;
+	private int y = -1;
+
+	public MyPanel() {
+		this.addMouseListener(new MouseAdapter() {
+			// Anonymous class.
+			public void mouseClicked(MouseEvent e) {
+				// Check whether the left mouse button is clicked
+				if (e.getButton() == MouseEvent.BUTTON1) {
+					x = e.getX();
+					y = e.getY();
+					// get the coordinate
+					System.out.println("(" + e.getX() + "," + e.getY() + ")");
+					// force Swing to repaint the red point
+					repaint();
+				}
+
+			}
+		});
+	}
+
+	@Override
+	protected void paintComponent(Graphics g) {
+		// must clean the panel before drawing on it.
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		// draw the red square
+		g.drawRect(x, y, 1, 1);
+	}
+}

lab/lab11/Question2/Start.java

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+public class Start {
+	public static void main(String[] args) {
+		javax.swing.SwingUtilities.invokeLater(new Runnable() {
+			// implements the Runnable interface with a run method
+			@Override
+			public void run() {
+				new MyFrame();
+			}
+		});
+	}
+}

lab/lab11/Question3/MyFrame.java

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+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		this.setTitle("MyFrame Title");
+		this.setSize(400, 300);
+		// Set the operation of the window when you click to close
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLocationRelativeTo(null);
+		BorderLayout fl = new BorderLayout();
+		// Set the layout manager for the frame.
+		this.setLayout(fl);
+		// The first panel
+		JPanel jp = new JPanel();
+		this.add(jp, BorderLayout.PAGE_START);
+		// The second panel
+		MyPanel p = new MyPanel();
+		p.setLayout(new FlowLayout(FlowLayout.CENTER));
+		JButton b1 = new JButton("left");
+		p.add(b1);
+		JButton b2 = new JButton("right");
+		p.add(b2);
+		this.add(p, BorderLayout.CENTER);
+		// Perform drawing and display to the desktop
+		this.setVisible(true);
+	}
+}

lab/lab11/Question3/MyPanel.java

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+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	private ArrayList<Point> point;
+
+	public MyPanel() {
+		point = new ArrayList<Point>();
+		// Anonymous class.
+		this.addMouseListener(new MouseAdapter() {
+			public void mouseClicked(MouseEvent e) {
+				// Check whether the left mouse button is clicked
+				if (e.getButton() == MouseEvent.BUTTON1) {
+					// store the point which been clicked
+					point.add(e.getPoint());
+					// get the coordinate
+					System.out.println("(" + e.getX() + "," + e.getY() + ")");
+				}
+
+			}
+		});
+	}
+
+	@Override
+	protected void paintComponent(Graphics g) {
+		// must clean the panel before drawing on it.
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for (int i = 0; i < point.size(); i++) {
+			g.drawRect((int) point.get(i).getX(), (int) point.get(i).getY(), 1, 1);
+		} // draw the red square
+		repaint();
+	}
+}

lab/lab11/Question3/Start.java

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+public class Start {
+	public static void main(String[] args) {
+		javax.swing.SwingUtilities.invokeLater(new Runnable() {
+			// implements the Runnable interface with a run method
+			@Override
+			public void run() {
+				new MyFrame();
+			}
+		});
+	}
+}

lab/lab11/Question4/MyFrame.java

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+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		this.setTitle("MyFrame Title");
+		this.setSize(400, 300);
+		// Set the operation of the window when you click to close
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLocationRelativeTo(null);
+		BorderLayout fl = new BorderLayout();
+		// Set the layout manager for the frame.
+		this.setLayout(fl);
+		// The first panel
+		JPanel jp = new JPanel();
+		this.add(jp, BorderLayout.PAGE_START);
+		// The second panel
+		MyPanel p = new MyPanel();
+		this.add(p, BorderLayout.PAGE_START);
+		p.setLayout(new FlowLayout(FlowLayout.CENTER));
+		JButton b1 = new JButton("left");
+		p.add(b1);
+		JButton b2 = new JButton("right");
+		p.add(b2);
+		this.add(p, BorderLayout.CENTER);
+		// Perform drawing and display to the desktop
+		this.setVisible(true);
+	}
+}

lab/lab11/Question4/MyPanel.java

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+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	private ArrayList<Point> point;
+
+	public MyPanel() {
+		point = new ArrayList<Point>();
+		// Anonymous class.
+		this.addMouseListener(new MouseAdapter() {
+			public void mouseClicked(MouseEvent e) {
+				// Check whether the left mouse button is clicked
+				if (e.getButton() == MouseEvent.BUTTON1) {
+					// store the point which been clicked
+					point.add(e.getPoint());
+					// get the coordinate
+					System.out.println("(" + e.getX() + "," + e.getY() + ")");
+				}
+
+			}
+		});
+	}
+
+	@Override
+	protected void paintComponent(Graphics g) {
+		// must clean the panel before drawing on it.
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for (int i = 0; i < point.size(); i++) {
+			g.drawRect((int) point.get(i).getX(), (int) point.get(i).getY(), 1, 1);
+			if (i > 0) {
+				// connect next point
+				g.drawLine((int) point.get(i).getX(), (int) point.get(i).getY(),
+						(int) point.get(i - 1).getX(), (int) point.get(i - 1).getY());
+			}
+		}
+		// draw the red square
+		repaint();
+	}
+}

lab/lab11/Question4/Start.java

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+public class Start {
+	public static void main(String[] args) {
+		javax.swing.SwingUtilities.invokeLater(new Runnable() {
+			// implements the Runnable interface with a run method
+			@Override
+			public void run() {
+				new MyFrame();
+			}
+		});
+	}
+}

lab/lab11/Question5/MyFrame.java

@@ -0,0 +1,41 @@
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		this.setTitle("MyFrame Title");
+		this.setSize(400, 300);
+		// Set the operation of the window when you click to close
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLocationRelativeTo(null);
+		BorderLayout fl = new BorderLayout();
+		// Set the layout manager for the frame.
+		this.setLayout(fl);
+		// The first panel
+		JPanel jp = new JPanel();
+		this.add(jp, BorderLayout.PAGE_START);
+		// The second panel
+		MyPanel p = new MyPanel();
+		p.setLayout(new FlowLayout(FlowLayout.CENTER));
+		JButton b1 = new JButton("Reset");
+		p.add(b1);
+		JButton b2 = new JButton("right");
+		p.add(b2);
+		b1.addMouseListener(new MouseAdapter() {
+			@Override
+			// use the button1 to reset
+			public void mouseClicked(MouseEvent e) {
+				p.cleanAllPoints();
+			}
+		});
+		this.add(p, BorderLayout.CENTER);
+		// Perform drawing and display to the desktop
+		this.setVisible(true);
+	}
+}

lab/lab11/Question5/MyPanel.java

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+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	private ArrayList<Point> point;
+
+	public MyPanel() {
+		point = new ArrayList<Point>();
+		// Anonymous class.
+		this.addMouseListener(new MouseAdapter() {
+			public void mouseClicked(MouseEvent e) {
+				// Check whether the left mouse button is clicked
+				if (e.getButton() == MouseEvent.BUTTON1) {
+					// store the point which been clicked
+					point.add(e.getPoint());
+					// get the coordinate
+					System.out.println("(" + e.getX() + "," + e.getY() + ")");
+
+				}
+
+			}
+		});
+	}
+
+	@Override
+	protected void paintComponent(Graphics g) {
+		// must clean the panel before drawing on it.
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for (int i = 0; i < point.size(); i++) {
+			g.drawRect((int) point.get(i).getX(), (int) point.get(i).getY(), 1, 1);
+			if (i > 0) {
+				// connect next point
+				g.drawLine((int) point.get(i).getX(), (int) point.get(i).getY(),
+						(int) point.get(i - 1).getX(), (int) point.get(i - 1).getY());
+			}
+		}
+		// draw the red square
+		repaint();
+	}
+
+	public void cleanAllPoints() { // uses the clear method of the arraylist to remove all the Point objects
+		point.clear();
+		repaint();
+	}
+}

lab/lab11/Question5/Start.java

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+public class Start {
+	public static void main(String[] args) {
+		javax.swing.SwingUtilities.invokeLater(new Runnable() {
+			// implements the Runnable interface with a run method
+			@Override
+			public void run() {
+				new MyFrame();
+			}
+		});
+	}
+}