3.1 M7
...
const #495 = Asciz	(Ljava/lang/Object;)I;
const #496 = NameAndType	#295:#296;//  compareTo:(Ljava/lang/String;)I
const #497 = Method	#2.#496;	//  java/lang/String.compareTo:(Ljava/lang/String;)I
const #498 = Asciz	Synthetic;
const #499 = Asciz	SourceFile;
const #500 = Asciz	String.java;
const #501 = Asciz	InnerClasses;
const #502 = Asciz	CaseInsensitiveComparator;
const #503 = Asciz	Signature;
const #504 = Asciz	Ljava/lang/Object;Ljava/io/Serializable;Ljava/lang/Comparable<Ljava/lang/String;>;Ljava/lang/CharSequence;;

...

public int compareTo(java.lang.Object);
  Signature: (Ljava/lang/Object;)I
  Code:
   Stack=2, Locals=2, Args_size=2
   0:	aload_0
   1:	aload_1
   2:	checkcast	#2; //class java/lang/String
   5:	invokevirtual	#497; //Method compareTo:(Ljava/lang/String;)I
   8:	ireturn
  LineNumberTable: 
   line 1: 0
  Synthetic: true

}

3.1 RC4 (Build id: I20050625-1005 in fact, but we've not released any
         change since RC4)

...
const #495 = Asciz	(Ljava/lang/Object;)I;
const #496 = Asciz	Signature;
const #497 = Asciz	(TT;)I;
const #498 = NameAndType	#295:#296;//  compareTo:(Ljava/lang/String;)I
const #499 = Method	#2.#498;	//  java/lang/String.compareTo:(Ljava/lang/String;)I
const #500 = Asciz	SourceFile;
const #501 = Asciz	String.java;
const #502 = Asciz	InnerClasses;
const #503 = Asciz	CaseInsensitiveComparator;
const #504 = Asciz	Ljava/lang/Object;Ljava/io/Serializable;Ljava/lang/Comparable<Ljava/lang/String;>;Ljava/lang/CharSequence;;

...

public int compareTo(java.lang.Object);
  Signature: (Ljava/lang/Object;)I
  Signature: length = 0x2
   01 FFFFFFF1 
  Code:
   Stack=2, Locals=2, Args_size=2
   0:	aload_0
   1:	aload_1
   2:	checkcast	#2; //class java/lang/String
   5:	invokevirtual	#499; //Method compareTo:(Ljava/lang/String;)I
   8:	ireturn
  LineNumberTable: 
   line 1: 0

}