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POJava Incompatible magic value 4022320623
 

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    <p>Im getting a strange error when im compiling my code on a server and downloading it and trying to run it on my computer.</p> <p>Im basically compiling some java files on an EC2 instance, then loading them into a storage for later use.</p> <p>When i download the files onto my computer and try to run them i am getting the following errors:</p> <pre><code>Exception in thread "main" java.lang.ClassFormatError: Incompatible magic value 4022320623 in class file HelloWorldPackage/HelloWorldClass at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:787) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:447) at java.net.URLClassLoader.access$100(URLClassLoader.java:71) at java.net.URLClassLoader$1.run(URLClassLoader.java:361) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:423) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:356) at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:476) </code></pre> <p>I am compiling the files using the following method:</p> <pre><code>public void compileProject() { String command = "javac "; for(String s: this.getPackages()) { File[] files = new File("/home/benuni/CompileFiles/" + project + "/src/" + s).listFiles(new FilenameFilter() { public boolean accept(File dir, String name) { return name.endsWith(".java"); } }); for(File f: files) { command = command + f.getAbsolutePath() + " "; } } try { System.out.println("command: '"+ command +"'"); Process pro = Runtime.getRuntime().exec(command); printLines(" stderr:", pro.getErrorStream()); pro.waitFor(); this.moveClassFiles(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } </code></pre> <p>and am uploading the files with this method:</p> <pre><code>public void uploadBin() { for(String s: this.getPackages()) { File[] filesInPackage = new File("/home/benuni/CompileFiles/"+this.project+"/bin/"+s).listFiles(); for(File f: filesInPackage) { String key = this.project+"/"+this.version+"/bin/"+s+"/"+f.getName(); s3.putObject("devcloud",key,f); } } } </code></pre> <p>does anyone know what i am doing wrong? The class files are runnable when i compile them on the computer, but when i upload them to the cloud and download them im getting the error?</p> <p>Thanks,</p> <p>Ben</p>
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    1. COrelated: http://stackoverflow.com/q/2390733/697449
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      1. USPaul Bellora
 

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