[Ch14] Example code for painting stuff to the GUI (5647d07e) · Commits · examples / Head First Java 3rd Edition

src/main/java/ch14/MyDrawPanel.java

+9 −2

Changes for src/main/java/ch14/MyDrawPanel.java: 9 added lines, 2 removed lines.
Original line number	Diff line number	Diff line
		package ch14;

		import javax.swing.*;
		import java.awt.Color;
		import java.awt.Graphics;
		import java.awt.*;

		class MyDrawPanel extends JPanel {

		@@ -11,4 +10,12 @@ class MyDrawPanel extends JPanel {

		g.fillRect(20, 50, 100, 100);
		}

		public static void main(String[] args) {
		JFrame frame = new JFrame();
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.getContentPane().add(new MyDrawPanel());
		frame.setSize(300, 300);
		frame.setVisible(true);
		}
		}
		No newline at end of file

0 → 100644

+25 −0

Changes for src/main/java/ch14/ShowCat.java: 25 added lines, 0 removed lines.
Original line number	Diff line number	Diff line
		package ch14;

		import javax.swing.*;
		import java.awt.*;
		import java.awt.image.ImageObserver;

		public class ShowCat extends JPanel implements ImageObserver {
		public void paintComponent(Graphics g) {
		Image image = new ImageIcon("catzilla.jpg").getImage();

		g.drawImage(image, 3, 4, this);
		}

		public boolean imageUpdate(Image img, int infoflags, int x, int y, int width, int height) {
		return false;
		}

		public static void main(String[] args) {
		JFrame frame = new JFrame();
		frame.add(new ShowCat());
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setSize(300, 300);
		frame.setVisible(true);
		}
		}

0 → 100644

+28 −0

Changes for src/main/java/ch14/ShowCircle.java: 28 added lines, 0 removed lines.
Original line number	Diff line number	Diff line
		package ch14;

		import javax.swing.*;
		import java.awt.*;
		import java.util.Random;

		public class ShowCircle extends JPanel {
		public void paintComponent(Graphics g) {
		g.fillRect(0, 0, this.getWidth(), this.getHeight());

		Random random = new Random();
		int red = random.nextInt(256);
		int green = random.nextInt(256);
		int blue = random.nextInt(256);

		Color randomColor = new Color(red, green, blue);
		g.setColor(randomColor);
		g.fillOval(70, 70, 100, 100);
		}

		public static void main(String[] args) {
		JFrame frame = new JFrame();
		frame.add(new ShowCircle());
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setSize(300, 300);
		frame.setVisible(true);
		}
		}

0 → 100644

+23 −0

Changes for src/main/java/ch14/ShowGradient.java: 23 added lines, 0 removed lines.
Original line number	Diff line number	Diff line
		package ch14;

		import javax.swing.*;
		import java.awt.*;

		public class ShowGradient extends JPanel {
		public void paintComponent(Graphics g) {
		Graphics2D g2d = (Graphics2D) g;

		GradientPaint gradient = new GradientPaint(70, 70, Color.blue, 150, 150, Color.orange);

		g2d.setPaint(gradient);
		g2d.fillOval(70, 70, 100, 100);
		}

		public static void main(String[] args) {
		JFrame frame = new JFrame();
		frame.add(new ShowGradient());
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setSize(300, 300);
		frame.setVisible(true);
		}
		}

0 → 100644

+34 −0

Changes for src/main/java/ch14/ShowRandomGradient.java: 34 added lines, 0 removed lines.
Original line number	Diff line number	Diff line
		package ch14;

		import javax.swing.*;
		import java.awt.*;
		import java.util.Random;

		public class ShowRandomGradient extends JPanel {
		public void paintComponent(Graphics g) {
		Graphics2D g2d = (Graphics2D) g;

		Random random = new Random();
		int red = random.nextInt(256);
		int green = random.nextInt(256);
		int blue = random.nextInt(256);
		Color startColor = new Color(red, green, blue);

		red = random.nextInt(256);
		green = random.nextInt(256);
		blue = random.nextInt(256);
		Color endColor = new Color(red, green, blue);

		GradientPaint gradient = new GradientPaint(70, 70, startColor, 150, 150, endColor);
		g2d.setPaint(gradient);
		g2d.fillOval(70,70,100,100);
		}

		public static void main(String[] args) {
		JFrame frame = new JFrame();
		frame.add(new ShowRandomGradient());
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setSize(300, 300);
		frame.setVisible(true);
		}
		}