Load Classes

public static ArrayList<ClassNode> loadClasses(final File jarFile) throws IOException {
ArrayList<ClassNode> classes = new ArrayList<ClassNode>();
ZipInputStream jis = new ZipInputStream(new FileInputStream(jarFile));
ZipEntry entry;
while ((entry = jis.getNextEntry()) != null) {
try {
final String name = entry.getName();
if (name.endsWith(".class")) {
byte[] bytes = getBytes(jis);
String cafebabe = String.format("%02X%02X%02X%02X", bytes[0], bytes[1], bytes[2], bytes[3]);
if(cafebabe.toLowerCase().equals("cafebabe")) {
try {
final ClassNode cn = getNode(bytes);
classes.add(cn);
} catch(Exception e) {
e.printStackTrace();
}
} else {
System.out.println(jarFile+">"+name+": Header does not start with CAFEBABE, ignoring.");
}
}
} catch(Exception e) {
} finally {
jis.closeEntry();
}
}
jis.close();
return classes;
}