How to Convert PSD to JPEG in Java. For more details: https://kb.conholdate.com/total/java/how-to-convert-psd-to-jpeg-in-java/

how-to-convert-png-to-psd-in-java.java

import com.aspose.psd.*;
import com.aspose.psd.fileformats.psd.PsdImage;
import com.aspose.psd.fileformats.psd.layers.Layer;
import com.aspose.psd.system.io.FileMode;
import com.aspose.psd.system.io.FileStream;

public class Main {
    public static void main(String[] args) throws Exception // PNG to PSD conversion in Java
    {
        // Set the licenses
        new License().setLicense("License.lic");

        // Load the PNG image
        FileStream imgStream = new FileStream("sample.png", FileMode.Open);

        // Instantiate and initialize the PsdImage with the default size
        PsdImage psdImg = new PsdImage(800, 800);

        // Declare a Layer object
        Layer lyr = null;
        try
        {
            // Initialize the Layer
            lyr = new Layer(imgStream.toInputStream());

            // Append layer to the PSD
            psdImg.addLayer(lyr);
        }
        catch (Exception e)
        {
            if (lyr != null)
                lyr.dispose();
        }

        // Save the PSD
        psdImg.save("output.psd");

        System.out.println("Done");
    }
}