https://openjdk.java.net/ 
public interface java.util.Comparator<T>
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: java.util.Comparator
  super_class: java.lang.Object
{
  public abstract int compare(T, );
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)I
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (TT;TT;)I
    MethodParameters:
      Name  Flags
      o1    
      o2    

  public abstract boolean equals(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      obj   
}
Signature: <T:Ljava/lang/Object;>Ljava/lang/Object;
SourceFile: "Comparator.java"