JAVA Graphics realizes color change, gradient, shadow, tilt, stereo

Graphics realizes several effects of discoloration, gradient, shadow, tilt, and stereo; after understanding these effects, it is easy to realize the click verification code and prepare for the next article.

package cn;
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.util.Random;
import javax.swing.JFrame;
import javax.swing.JPanel;
/**
 * Text that will change color
 */
public class ChangeColorTextFrame extends JFrame {
    private ChangeColorTextPanel changeColorTextPanel = new ChangeColorTextPanel();

    public static void main(String args[]) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    ChangeColorTextFrame frame = new ChangeColorTextFrame();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace ();
                }
            }
        });
        ChangeColorTextFrame frame=new ChangeColorTextFrame();
        frame.setVisible(true);
}

    public ChangeColorTextFrame() {
        super();
        setBounds(100, 100, 400, 205);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setTitle("Text that will change color");
        getContentPane().add(changeColorTextPanel);
        Thread thread = new Thread(changeColorTextPanel);// Create a thread object
        thread.start();// start the thread object
    }

    class ChangeColorTextPanel extends JPanel implements Runnable { // Create inner panel class
        Color color = new Color(0, 0, 255);

        public void paint(Graphics g) { // Override paint() method
            Graphics2D g2 = (Graphics2D) g;// Convert to Graphics2D type
            String value = ""Video Learning Java Programming"";//The drawn text
            int x = 2; // abscissa of the text position
            int y = 90; // vertical coordinate of text position
            Font font = new Font("Kaishi", Font.BOLD, 40); // create a font object
            g2.setFont(font); // set font
            g2.setColor(color);// set the color
            g2.drawString(value, x, y); // draw text
        }

        public void run() {
            Random random = new Random();// Create a random number object
            while (true) {
                int R = random.nextInt(256);// Randomly generate the R value of the color
                int G = random.nextInt(256);// Randomly generate the G value of the color
                int B = random.nextInt(256);// Randomly generate the B value of the color
                color = new Color(R, G, B);// create a color object
                repaint();// call paint() method
                try {
                    Thread.sleep(300);// sleep for 300 milliseconds
                } catch (InterruptedException e) {
                    e.printStackTrace ();
                }
            }
        }
    }
}

package cn;
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JFrame;
import javax.swing.JPanel;
/**
 * Text with gradient effect
 */
public class GradientTextFrame extends JFrame {
    private GradientTextPanel gradientTextPanel = new GradientTextPanel();
    
    public static void main(String args[]) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    GradientTextFrame frame = new GradientTextFrame();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace ();
                }
            }
        });
    }
    
    public GradientTextFrame() {
        super();
        setBounds(100, 100, 365, 205);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setTitle("Text with gradient effect");
        getContentPane().add(gradientTextPanel);
    }
    
    class GradientTextPanel extends JPanel { // Create inner panel class
        public void paint(Graphics g) { // Override paint() method
            Graphics2D g2 = (Graphics2D) g;// Convert to Graphics2D type
            String value = "Java Almighty";// Text drawn
            int x = 15; // abscissa of the text position
            int y = 60; // vertical coordinate of text position
            Font font = new Font("Kaishi", Font.BOLD, 60); // create a font object
            g2.setFont(font); // set font
            // Create a GraphientPaint object with a circular gradient
            GradientPaint paint = new GradientPaint(20, 20, Color.BLUE, 100,120, Color.RED, true);
            g2.setPaint(paint);// set the gradient
            g2.drawString(value, x, y); // draw text
            font = new Font("Chinese Xingkai", Font.BOLD, 60); // create a new font object
            g2.setFont(font); // set font
            x = 80; // abscissa of the text position
            y = 130; // vertical coordinate of text position
            value = "Programming Dictionary";// Text drawn
            g2.drawString(value, x, y); // draw text
        }
    }
}

package cn;
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.Graphics;
import javax.swing.JFrame;
import javax.swing.JPanel;
/**
 * Text with shadow effect
 */
public class ShadowTextFrame extends JFrame {
    private ShadowTextPanel shadowTextPanel = new ShadowTextPanel();
    
    public static void main(String args[]) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    ShadowTextFrame frame = new ShadowTextFrame();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace ();
                }
            }
        });
    }
    
    public ShadowTextFrame() {
        super();
        setBounds(100, 100, 354, 205);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setTitle("Text with shadow effect");
        getContentPane().add(shadowTextPanel);
    }
    
    class ShadowTextPanel extends JPanel { // Create inner panel class
        public void paint(Graphics g) { // Override paint() method
            String value = "Programming Dictionary";
            int x = 16; // abscissa of the text position
            int y = 100; // vertical coordinate of text position
            Font font = new Font("Chinese Xingkai", Font.BOLD, 72); // create a font object
            g.setFont(font); // set font
            g.setColor(Color.GRAY);// Set the color to gray
            int i = 0; // loop variable
            g.drawString(value, x, y); // draw the text
            x -= 3;// Adjust the abscissa value of the drawn point
            y -= 3;// Adjust the ordinate value of the drawn point
            g.setColor(Color.BLACK);// Set the color black
            g.drawString(value, x, y); // draw the text
        }
    }
}

package cn;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JFrame;
import javax.swing.JPanel;
/**
 * Tilt effect text
 */
public class ShearTextFrame extends JFrame {
    private ShearTextPanel shearTextPanel = new ShearTextPanel();
    
    public static void main(String args[]) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    ShearTextFrame frame = new ShearTextFrame();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace ();
                }
            }
        });
    }
    
    public ShearTextFrame() {
        super();
        setBounds(100, 100, 365, 205);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setTitle("Tilt effect text");
        getContentPane().add(shearTextPanel);
    }
    
    class ShearTextPanel extends JPanel { // Create inner panel class
        public void paint(Graphics g) { // Override paint() method
            Graphics2D g2 = (Graphics2D)g;// Convert to Graphics2D type
            String value = "Programming Dictionary";// Text drawn
            int x = 10; // abscissa of the text position
            int y = 170; // vertical coordinate of text position
            Font font = new Font("Chinese Xingkai", Font.BOLD, 72); // create a font object
            g2.setFont(font); // set font
            g2.shear(0.1, -0.4);// tilt the canvas
            g2.drawString(value, x, y); // draw text
        }
    }
}

package cn;
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.Graphics;
import javax.swing.JFrame;
import javax.swing.JPanel;
/**
 * Three-dimensional effect text
 */
public class SolidTextFrame extends JFrame {
    private SolidTextPanel solidTextPanel = new SolidTextPanel ();
    public static void main(String args[]) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    SolidTextFrame frame = new SolidTextFrame ();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace ();
                }
            }
        });
    }
    public SolidTextFrame () {
        super();
        setBounds(100, 100, 354, 205);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setTitle("Text with three-dimensional effect");
        getContentPane().add(solidTextPanel);
    }
    class SolidTextPanel extends JPanel { // Create inner panel class
        public void paint(Graphics g) { // Override paint() method
            String value = "Tomorrow Technology";
            int x = 16; // abscissa of the text position
            int y = 100; // vertical coordinate of text position
            Font font = new Font("宋体", Font.BOLD, 72); // create a font object
            g.setFont(font); // set font
            g.setColor(Color.GRAY);// Set the color to gray
            int i = 0; // loop variable
            while (i<8){
                g.drawString(value, x, y); // draw the text
                x+=1;// Adjust the abscissa value of the drawing point
                y+=1;// Adjust the ordinate value of the drawing point
                i++;// Adjust the value of the loop variable
            }
            g.setColor(Color.BLACK);// Set the color black
            g.drawString(value, x, y); // draw the text
        }
    }
}

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