https://github.com/eclipse/eclipse-collections/eclipse-collections: Eclipse Collections is a collections framework for Java. It has JDK-compatible List, Set and Map implementations with a rich API and set of utility classes that work with any JDK compatible Collections, Arrays, Maps or Strings. The iteration protocol was inspired by the Smalltalk collection framework.
  • Craig P. Motlin
  • Donald Raab
  • Mohammad A. Rezaei
  • Hiroshi Ito
  • Nikhil J. Nanivadekar 
public final class org.eclipse.collections.impl.tuple.ImmutableEntry<K, V> extends org.eclipse.collections.impl.tuple.AbstractImmutableEntry<K, V>
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: org.eclipse.collections.impl.tuple.ImmutableEntry
  super_class: org.eclipse.collections.impl.tuple.AbstractImmutableEntry
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 1

  public void <init>(K, );
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // org.eclipse.collections.impl.tuple.ImmutableEntry this
        start local 1 // java.lang.Object key
        start local 2 // java.lang.Object value
         0: .line 23
            aload 0 /* this */
            aload 1 /* key */
            aload 2 /* value */
            invokespecial org.eclipse.collections.impl.tuple.AbstractImmutableEntry.<init>:(Ljava/lang/Object;Ljava/lang/Object;)V
         1: .line 24
            return
        end local 2 // java.lang.Object value
        end local 1 // java.lang.Object key
        end local 0 // org.eclipse.collections.impl.tuple.ImmutableEntry this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    2     0   this  Lorg/eclipse/collections/impl/tuple/ImmutableEntry<TK;TV;>;
            0    2     1    key  TK;
            0    2     2  value  TV;
    Signature: (TK;TV;)V
    MethodParameters:
       Name  Flags
      key    
      value  

  public static <T1, T2> org.eclipse.collections.impl.tuple.ImmutableEntry<T1, T2> of(T1, T2);
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)Lorg/eclipse/collections/impl/tuple/ImmutableEntry;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // java.lang.Object key
        start local 1 // java.lang.Object value
         0: .line 28
            new org.eclipse.collections.impl.tuple.ImmutableEntry
            dup
            aload 0 /* key */
            aload 1 /* value */
            invokespecial org.eclipse.collections.impl.tuple.ImmutableEntry.<init>:(Ljava/lang/Object;Ljava/lang/Object;)V
            areturn
        end local 1 // java.lang.Object value
        end local 0 // java.lang.Object key
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0    key  TT1;
            0    1     1  value  TT2;
    Signature: <T1:Ljava/lang/Object;T2:Ljava/lang/Object;>(TT1;TT2;)Lorg/eclipse/collections/impl/tuple/ImmutableEntry<TT1;TT2;>;
    MethodParameters:
       Name  Flags
      key    
      value  

  public boolean equals(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=2
        start local 0 // org.eclipse.collections.impl.tuple.ImmutableEntry this
        start local 1 // java.lang.Object object
         0: .line 37
            aload 1 /* object */
            instanceof java.util.Map$Entry
            ifeq 6
         1: .line 39
            aload 1 /* object */
            checkcast java.util.Map$Entry
            astore 2 /* that */
        start local 2 // java.util.Map$Entry that
         2: .line 40
            aload 0 /* this */
            getfield org.eclipse.collections.impl.tuple.ImmutableEntry.key:Ljava/lang/Object;
            aload 2 /* that */
            invokeinterface java.util.Map$Entry.getKey:()Ljava/lang/Object;
            invokestatic org.eclipse.collections.impl.block.factory.Comparators.nullSafeEquals:(Ljava/lang/Object;Ljava/lang/Object;)Z
            ifeq 5
         3: .line 41
            aload 0 /* this */
            getfield org.eclipse.collections.impl.tuple.ImmutableEntry.value:Ljava/lang/Object;
            aload 2 /* that */
            invokeinterface java.util.Map$Entry.getValue:()Ljava/lang/Object;
            invokestatic org.eclipse.collections.impl.block.factory.Comparators.nullSafeEquals:(Ljava/lang/Object;Ljava/lang/Object;)Z
            ifeq 5
         4: .line 40
            iconst_1
            ireturn
      StackMap locals: java.util.Map$Entry
      StackMap stack:
         5: iconst_0
            ireturn
        end local 2 // java.util.Map$Entry that
         6: .line 43
      StackMap locals:
      StackMap stack:
            iconst_0
            ireturn
        end local 1 // java.lang.Object object
        end local 0 // org.eclipse.collections.impl.tuple.ImmutableEntry this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    7     0    this  Lorg/eclipse/collections/impl/tuple/ImmutableEntry<TK;TV;>;
            0    7     1  object  Ljava/lang/Object;
            2    6     2    that  Ljava/util/Map$Entry<**>;
    MethodParameters:
        Name  Flags
      object  

  public int hashCode();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=1
        start local 0 // org.eclipse.collections.impl.tuple.ImmutableEntry this
         0: .line 52
            aload 0 /* this */
            getfield org.eclipse.collections.impl.tuple.ImmutableEntry.key:Ljava/lang/Object;
            astore 1 /* key */
        start local 1 // java.lang.Object key
         1: .line 53
            aload 0 /* this */
            getfield org.eclipse.collections.impl.tuple.ImmutableEntry.value:Ljava/lang/Object;
            astore 2 /* value */
        start local 2 // java.lang.Object value
         2: .line 54
            aload 1 /* key */
            ifnonnull 3
            iconst_0
            goto 4
      StackMap locals: java.lang.Object java.lang.Object
      StackMap stack:
         3: aload 1 /* key */
            invokevirtual java.lang.Object.hashCode:()I
         4: .line 55
      StackMap locals:
      StackMap stack: int
            aload 2 /* value */
            ifnonnull 5
            iconst_0
            goto 6
      StackMap locals:
      StackMap stack: int
         5: aload 2 /* value */
            invokevirtual java.lang.Object.hashCode:()I
         6: .line 54
      StackMap locals: org.eclipse.collections.impl.tuple.ImmutableEntry java.lang.Object java.lang.Object
      StackMap stack: int int
            ixor
            ireturn
        end local 2 // java.lang.Object value
        end local 1 // java.lang.Object key
        end local 0 // org.eclipse.collections.impl.tuple.ImmutableEntry this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    7     0   this  Lorg/eclipse/collections/impl/tuple/ImmutableEntry<TK;TV;>;
            1    7     1    key  TK;
            2    7     2  value  TV;
}
Signature: <K:Ljava/lang/Object;V:Ljava/lang/Object;>Lorg/eclipse/collections/impl/tuple/AbstractImmutableEntry<TK;TV;>;
SourceFile: "ImmutableEntry.java"
InnerClasses:
  public abstract Entry = java.util.Map$Entry of java.util.Map