http://fastutil.di.unimi.it/: fastutil extends the Java Collections Framework by providing type-specific maps, sets, lists and priority queues with a small memory footprint and fast access and insertion; provides also big (64-bit) arrays, sets and lists, and fast, practical I/O classes for binary and text files.
  • Sebastiano Vigna 
public interface it.unimi.dsi.fastutil.ints.IntHash
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: it.unimi.dsi.fastutil.ints.IntHash
  super_class: java.lang.Object
{
}
SourceFile: "IntHash.java"
NestMembers:
  it.unimi.dsi.fastutil.ints.IntHash$Strategy
InnerClasses:
  public abstract Strategy = it.unimi.dsi.fastutil.ints.IntHash$Strategy of it.unimi.dsi.fastutil.ints.IntHash