!7

set flag AllPublic.

p {
  ClassGen cg = new("User123", "java.lang.Object", null,
    Const.ACC_PUBLIC, new S[] { className(IF0) });
  cg.addEmptyConstructor(Const.ACC_PUBLIC);
  
  // make code for get() method
  
  var m = new MethodMaker(cg, "get", O);
  
  // declare and create StringBuffer
  
  int buffer = m.newLocalVar();
  m.newObject(StringBuffer.class).astore(buffer);
  
  // Append two strings
  
  for (string : ll("Hello ", "world")) {
    m.aload(buffer).stringConstant(string);
    m.il.append(m.factory.createAppend(org.apache.bcel.generic.Type.OBJECT));
  }
  
  // call StringBuffer.toString() and return
  
  m.aload(buffer);
  m.invokeVirtual(StringBuffer.class, "toString", S);
  m.areturn().done();
  
  // bake class
  JavaClass baked = cg.getJavaClass();
  
  // print class overview
  print(baked);
  
  // print the methods
  for (method : baked.getMethods()) {
    print("\n" + method);
    print(method.getCode());
  }
  
  byte[] bytes = baked.getBytes();
  var cl = new InMemoryClassLoader(myClassLoader());
  
  time "Defining class" {
    Class<? extends IF0> c = cast cl.defineAClass("User123", bytes);
  }
  print(c);
  
  IF0 f = newInstance(c);
  print(f);
  assertEqualsVerbose("Hello world", f!);
}

Began life as a copy of #1034300