Part of the constant pool:
ID: 21 FIELD: "[ud$1, [this$0, Lud;]]"
ID: 23 FIELD: "[ud$1, [val$adPlacement, Luh;]]"
ID: 25 FIELD: "[ud$1, [val$adTransformListener, Luo;]]"
ID: 28 METHOD: "[java/lang/Object, [<init>, ()V]]"

constructor method:
<init> (Lud;Luh;Luo;)V
  [
aload_0, //push 'this' on the stack
aload_1, //push first parameter from method on the stack
putfield 21, //put last item on stack to field 21 of the object which is before last item on stack
aload_0, //push 'this' on the stack
aload_2, //push second parameter from method on the stack
putfield 23, //put last item on stack to field 23 of the object which is before last item on stack
aload_0, //push 'this' on the stack
aload_3, //push third parameter from method on the stack
putfield 25, //put last item on stack to field 25 of the object which is before last item on stack
aload_0, //push 'this' on the stack
invokespecial 28, //invoke method 28 on the object which is last item on the stack
return //well, return. duh!
]

It's more or less equivalent to this
public ud$1(ud udObject, uh uhObject, uo uoObject) {
	this.this$0 = udObject;
	this.val$adPlacement = uhObject;
	this.val$adTransformListener = uoObject;
	this.super();
	return;
}