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POHow to generate class file with java ASM?
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  1. POHow to generate class file with java ASM?
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    copied!<p>I have tried</p> <pre><code> ClassWriter t = new ClassWriter(0); t.visitSource("testing.java", null); t.visitEnd(); byte d[] = t.toByteArray(); FileOutputStream p = null; try { p = new FileOutputStream("testing.class"); } catch (FileNotFoundException e) { e.printStackTrace(); } try { p.write(d); } catch (IOException e) { e.printStackTrace(); } </code></pre> <p>And the text within the testing.java is:</p> <pre><code>public class testing { public static void main(String args[]) { System.out.println("Works!"); } } </code></pre> <p>However, When I try to run the class file, it gives me this error:</p> <pre><code>Exception in thread "main" java.lang.UnsupportedClassVersionError: testing : Unsupported major.minor version 0.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) at java.lang.ClassLoader.defineClass(ClassLoader.java:615) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) at java.net.URLClassLoader.access$000(URLClassLoader.java:58) at java.net.URLClassLoader$1.run(URLClassLoader.java:197) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) </code></pre> <p>How would I fix it so that the class file would output "Works!" to the console?</p> <p><strong>Edit:</strong></p> <p>I don't want it to have to access the jdk files! (&lt;- Ex. javax.tools) That's why I was trying to get ASM to work.</p>
 

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