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@mildsunrise
Created March 30, 2024 13:37
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copy a test image to the clipboard using Java AWT
import java.awt.*;
import java.awt.datatransfer.*;
import java.awt.image.*;
import java.io.*;
public class Main {
public static void main(String[] arg) {
var flavorMap = (FlavorTable) SystemFlavorMap.getDefaultFlavorMap();
System.out.println("formats for image flavor: ");
for (var format : flavorMap.getNativesForFlavor(DataFlavor.imageFlavor))
System.out.println(" - " + format);
var clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
var image = new BufferedImage(100, 100, BufferedImage.TYPE_3BYTE_BGR);
var contents = new TransferableImage(image);
var owner = new MyOwner();
clipboard.setContents(contents, owner);
System.out.println("blank image copied to clipboard!");
System.out.println("process will stay alive until something else is copied.");
owner.waitForLost();
}
private static class MyOwner implements ClipboardOwner {
private boolean lost = false;
public synchronized void lostOwnership(Clipboard clip, Transferable trans) {
System.out.println("lost ownership.");
lost = true;
notifyAll();
}
synchronized void waitForLost() {
try {
while (!lost)
wait();
} catch (InterruptedException ex) {
throw new RuntimeException(ex);
}
}
}
private static class TransferableImage implements Transferable {
Image i;
public TransferableImage(Image i) {
this.i = i;
}
public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException, IOException {
if (flavor.equals(DataFlavor.imageFlavor))
return i;
throw new UnsupportedFlavorException(flavor);
}
public DataFlavor[] getTransferDataFlavors() {
return new DataFlavor[] { DataFlavor.imageFlavor };
}
public boolean isDataFlavorSupported(DataFlavor flavor) {
return flavor.equals(DataFlavor.imageFlavor);
}
}
}
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