AlphaComposite: getInstance(int rule, float alpha) : AlphaComposite « java.awt « Java by API

1. Java by API
2. java.awt
3. AlphaComposite

AlphaComposite: getInstance(int rule, float alpha)

 
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Composite;
import java.awt.Container;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.Rectangle2D;

import javax.swing.JComponent;
import javax.swing.JFrame;

public class MainClass {
  public static void main(String[] args) {
    JFrame jf = new JFrame("Demo");
    Container cp = jf.getContentPane();
    MyCanvas tl = new MyCanvas();
    cp.add(tl);
    jf.setSize(300, 200);
    jf.setVisible(true);
  }
}

class MyCanvas extends JComponent {

  public void paint(Graphics g) {
    Graphics2D g2 = (Graphics2D)g;
    
    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
        RenderingHints.VALUE_ANTIALIAS_ON);

    Rectangle2D r = new Rectangle2D.Double(50, 50, 150, 100);
    g2.setPaint(Color.red);
    g2.fill(r);

    Composite c = AlphaComposite.getInstance(AlphaComposite.SRC_OVER,
       .4f);
    g2.setComposite(c);


    g2.setPaint(Color.blue);
    g2.setFont(new Font("Times New Roman", Font.PLAIN, 72));
    g2.drawString("www.java2s.com", 25, 130);
  }
}


           
         
  

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