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    <p>A rather complex solution to hide an image in a java class, without including the file itself or using base64 (thus reducing the class java file size), is to use the following java program tool to convert an image to a collection of java byte arrays and method invocations that will assemble the original image:</p> <pre><code>import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.PrintWriter; public class ImageDataGenerator { public static void main(String[] params) throws InterruptedException, FileNotFoundException, IOException { if (params.length != 2) { System.out.printf("Uso: java ImageDataGenerator &lt;nombre_imagen&gt; &lt;archivo_imagen&gt;\n"); System.exit(1); } String imageName = params[0]; FileInputStream fis = new FileInputStream(params[1]); PrintWriter p = new PrintWriter("imgData.txt"); p.printf(" private byte[] get%sPart1() {\n", imageName); p.printf(" return new byte[] {"); int readed = 0; int writed = 0; int numMethods = 1; while ((readed = fis.read()) != -1) { if (writed &lt; 3000) { p.printf("%d,", (byte) readed); } else { writed = 0; p.printf("%d};\n", (byte) readed); p.printf(" }\n"); numMethods++; p.printf(" private byte[] get%sPart%d() {\n", imageName, numMethods); p.printf(" return new byte[] {\n "); } if ((++writed % 500) == 0) { p.printf("\n"); } } p.printf("};\n"); p.printf(" }\n\n"); p.println(" private BufferedImage createImageFromArrays(byte[]... arrays) throws IOException { "); p.println(" int size = 0;"); p.println(" for (byte[] array : arrays) size = array.length;"); p.println(" byte[] imageInByte = new byte[size];"); p.println(" int pos = 0;"); p.println(" for (byte[] array : arrays) {"); p.println(" System.arraycopy(array, 0, imageInByte, pos, array.length);"); p.println(" pos += array.length;"); p.println(" }"); p.println(" "); p.println(" InputStream in = new ByteArrayInputStream(imageInByte);"); p.println(" return ImageIO.read(in);"); p.println(" }"); p.println("\n"); p.println("// Insert this call anywhere in your code"); p.printf("createImageFromArrays("); for (int i = 1; i &lt;= numMethods; i++) p.printf("get%sPart%d()%s ", imageName, i, i &lt;= numMethods - 1 ? "," : ""); p.printf(");"); p.flush(); p.close(); } } </code></pre> <p>Use the tool typing: <code>java ImageDataGenerator hiddenImage /path/to/image/image.png</code></p> <p>It will generate a file named <code>imgData.txt</code> which content you must copy/paste inside your <code>JFrame</code> class declaration section. The last line of the generated file will contain a call to a method named <code>createImageFromArrays</code> which you must invoke in your <code>JFrame</code> onShow/onLoad event listener </p> <p>(I used this tool before to hide images/resources in J2ME applications, hope it helps)</p>
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    1. POConverting base64 image to an actual image with using only libraries java comes with
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