Create an image that supports transparent pixels from GraphicsConfiguration

  

import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Transparency;
import java.awt.image.BufferedImage;

public class Main {
  public static void main(String[] argv) throws Exception {
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice gs = ge.getDefaultScreenDevice();
    GraphicsConfiguration gc = gs.getDefaultConfiguration();

    BufferedImage bimage = gc.createCompatibleImage(100, 100, Transparency.BITMASK);

  }
}

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Create an image that supports transparent pixels from GraphicsConfiguration : Graphic Environment « 2D Graphics GUI « Java

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