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 
class org.eclipse.collections.impl.tuple.PairImpl<T1, T2> implements org.eclipse.collections.api.tuple.Pair<T1, T2>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.eclipse.collections.impl.tuple.PairImpl
  super_class: java.lang.Object
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 1

  private final T1 one;
    descriptor: Ljava/lang/Object;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: TT1;

  private final T2 two;
    descriptor: Ljava/lang/Object;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: TT2;

  void <init>(T1, );
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // org.eclipse.collections.impl.tuple.PairImpl this
        start local 1 // java.lang.Object newOne
        start local 2 // java.lang.Object newTwo
         0: .line 30
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 32
            aload 0 /* this */
            aload 1 /* newOne */
            putfield org.eclipse.collections.impl.tuple.PairImpl.one:Ljava/lang/Object;
         2: .line 33
            aload 0 /* this */
            aload 2 /* newTwo */
            putfield org.eclipse.collections.impl.tuple.PairImpl.two:Ljava/lang/Object;
         3: .line 34
            return
        end local 2 // java.lang.Object newTwo
        end local 1 // java.lang.Object newOne
        end local 0 // org.eclipse.collections.impl.tuple.PairImpl this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    4     0    this  Lorg/eclipse/collections/impl/tuple/PairImpl<TT1;TT2;>;
            0    4     1  newOne  TT1;
            0    4     2  newTwo  TT2;
    Signature: (TT1;TT2;)V
    MethodParameters:
        Name  Flags
      newOne  
      newTwo  

  public T1 getOne();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.eclipse.collections.impl.tuple.PairImpl this
         0: .line 39
            aload 0 /* this */
            getfield org.eclipse.collections.impl.tuple.PairImpl.one:Ljava/lang/Object;
            areturn
        end local 0 // org.eclipse.collections.impl.tuple.PairImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/eclipse/collections/impl/tuple/PairImpl<TT1;TT2;>;
    Signature: ()TT1;

  public T2 getTwo();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.eclipse.collections.impl.tuple.PairImpl this
         0: .line 45
            aload 0 /* this */
            getfield org.eclipse.collections.impl.tuple.PairImpl.two:Ljava/lang/Object;
            areturn
        end local 0 // org.eclipse.collections.impl.tuple.PairImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/eclipse/collections/impl/tuple/PairImpl<TT1;TT2;>;
    Signature: ()TT2;

  public void put(java.util.Map<? super T1, ? super T2>);
    descriptor: (Ljava/util/Map;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // org.eclipse.collections.impl.tuple.PairImpl this
        start local 1 // java.util.Map map
         0: .line 51
            aload 1 /* map */
            aload 0 /* this */
            getfield org.eclipse.collections.impl.tuple.PairImpl.one:Ljava/lang/Object;
            aload 0 /* this */
            getfield org.eclipse.collections.impl.tuple.PairImpl.two:Ljava/lang/Object;
            invokeinterface java.util.Map.put:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            pop
         1: .line 52
            return
        end local 1 // java.util.Map map
        end local 0 // org.eclipse.collections.impl.tuple.PairImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/eclipse/collections/impl/tuple/PairImpl<TT1;TT2;>;
            0    2     1   map  Ljava/util/Map<-TT1;-TT2;>;
    Signature: (Ljava/util/Map<-TT1;-TT2;>;)V
    MethodParameters:
      Name  Flags
      map   

  public org.eclipse.collections.impl.tuple.PairImpl<T2, T1> swap();
    descriptor: ()Lorg/eclipse/collections/impl/tuple/PairImpl;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=1, args_size=1
        start local 0 // org.eclipse.collections.impl.tuple.PairImpl this
         0: .line 57
            new org.eclipse.collections.impl.tuple.PairImpl
            dup
            aload 0 /* this */
            getfield org.eclipse.collections.impl.tuple.PairImpl.two:Ljava/lang/Object;
            aload 0 /* this */
            getfield org.eclipse.collections.impl.tuple.PairImpl.one:Ljava/lang/Object;
            invokespecial org.eclipse.collections.impl.tuple.PairImpl.<init>:(Ljava/lang/Object;Ljava/lang/Object;)V
            areturn
        end local 0 // org.eclipse.collections.impl.tuple.PairImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/eclipse/collections/impl/tuple/PairImpl<TT1;TT2;>;
    Signature: ()Lorg/eclipse/collections/impl/tuple/PairImpl<TT2;TT1;>;

  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.PairImpl this
        start local 1 // java.lang.Object o
         0: .line 63
            aload 0 /* this */
            aload 1 /* o */
            if_acmpne 2
         1: .line 65
            iconst_1
            ireturn
         2: .line 67
      StackMap locals:
      StackMap stack:
            aload 1 /* o */
            instanceof org.eclipse.collections.api.tuple.Pair
            ifne 4
         3: .line 69
            iconst_0
            ireturn
         4: .line 72
      StackMap locals:
      StackMap stack:
            aload 1 /* o */
            checkcast org.eclipse.collections.api.tuple.Pair
            astore 2 /* that */
        start local 2 // org.eclipse.collections.api.tuple.Pair that
         5: .line 74
            aload 0 /* this */
            getfield org.eclipse.collections.impl.tuple.PairImpl.one:Ljava/lang/Object;
            aload 2 /* that */
            invokeinterface org.eclipse.collections.api.tuple.Pair.getOne:()Ljava/lang/Object;
            invokestatic java.util.Objects.equals:(Ljava/lang/Object;Ljava/lang/Object;)Z
            ifeq 8
         6: .line 75
            aload 0 /* this */
            getfield org.eclipse.collections.impl.tuple.PairImpl.two:Ljava/lang/Object;
            aload 2 /* that */
            invokeinterface org.eclipse.collections.api.tuple.Pair.getTwo:()Ljava/lang/Object;
            invokestatic java.util.Objects.equals:(Ljava/lang/Object;Ljava/lang/Object;)Z
            ifeq 8
         7: .line 74
            iconst_1
            ireturn
      StackMap locals: org.eclipse.collections.api.tuple.Pair
      StackMap stack:
         8: iconst_0
            ireturn
        end local 2 // org.eclipse.collections.api.tuple.Pair that
        end local 1 // java.lang.Object o
        end local 0 // org.eclipse.collections.impl.tuple.PairImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    9     0  this  Lorg/eclipse/collections/impl/tuple/PairImpl<TT1;TT2;>;
            0    9     1     o  Ljava/lang/Object;
            5    9     2  that  Lorg/eclipse/collections/api/tuple/Pair<**>;
    MethodParameters:
      Name  Flags
      o     

  public int hashCode();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=1
        start local 0 // org.eclipse.collections.impl.tuple.PairImpl this
         0: .line 81
            aload 0 /* this */
            getfield org.eclipse.collections.impl.tuple.PairImpl.one:Ljava/lang/Object;
            ifnonnull 1
            iconst_0
            goto 2
      StackMap locals:
      StackMap stack:
         1: aload 0 /* this */
            getfield org.eclipse.collections.impl.tuple.PairImpl.one:Ljava/lang/Object;
            invokevirtual java.lang.Object.hashCode:()I
      StackMap locals:
      StackMap stack: int
         2: istore 1 /* result */
        start local 1 // int result
         3: .line 82
            bipush 29
            iload 1 /* result */
            imul
            aload 0 /* this */
            getfield org.eclipse.collections.impl.tuple.PairImpl.two:Ljava/lang/Object;
            ifnonnull 4
            iconst_0
            goto 5
      StackMap locals: org.eclipse.collections.impl.tuple.PairImpl int
      StackMap stack: int
         4: aload 0 /* this */
            getfield org.eclipse.collections.impl.tuple.PairImpl.two:Ljava/lang/Object;
            invokevirtual java.lang.Object.hashCode:()I
      StackMap locals: org.eclipse.collections.impl.tuple.PairImpl int
      StackMap stack: int int
         5: iadd
            istore 1 /* result */
         6: .line 83
            iload 1 /* result */
            ireturn
        end local 1 // int result
        end local 0 // org.eclipse.collections.impl.tuple.PairImpl this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    7     0    this  Lorg/eclipse/collections/impl/tuple/PairImpl<TT1;TT2;>;
            3    7     1  result  I

  public java.lang.String toString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.eclipse.collections.impl.tuple.PairImpl this
         0: .line 89
            new java.lang.StringBuilder
            dup
            invokespecial java.lang.StringBuilder.<init>:()V
            aload 0 /* this */
            getfield org.eclipse.collections.impl.tuple.PairImpl.one:Ljava/lang/Object;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
            ldc ":"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            aload 0 /* this */
            getfield org.eclipse.collections.impl.tuple.PairImpl.two:Ljava/lang/Object;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            areturn
        end local 0 // org.eclipse.collections.impl.tuple.PairImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/eclipse/collections/impl/tuple/PairImpl<TT1;TT2;>;

  public java.util.Map$Entry<T1, T2> toEntry();
    descriptor: ()Ljava/util/Map$Entry;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.eclipse.collections.impl.tuple.PairImpl this
         0: .line 95
            aload 0 /* this */
            getfield org.eclipse.collections.impl.tuple.PairImpl.one:Ljava/lang/Object;
            aload 0 /* this */
            getfield org.eclipse.collections.impl.tuple.PairImpl.two:Ljava/lang/Object;
            invokestatic org.eclipse.collections.impl.tuple.ImmutableEntry.of:(Ljava/lang/Object;Ljava/lang/Object;)Lorg/eclipse/collections/impl/tuple/ImmutableEntry;
            areturn
        end local 0 // org.eclipse.collections.impl.tuple.PairImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/eclipse/collections/impl/tuple/PairImpl<TT1;TT2;>;
    Signature: ()Ljava/util/Map$Entry<TT1;TT2;>;

  public int compareTo(org.eclipse.collections.api.tuple.Pair<T1, T2>);
    descriptor: (Lorg/eclipse/collections/api/tuple/Pair;)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=2
        start local 0 // org.eclipse.collections.impl.tuple.PairImpl this
        start local 1 // org.eclipse.collections.api.tuple.Pair other
         0: .line 101
            aload 0 /* this */
            getfield org.eclipse.collections.impl.tuple.PairImpl.one:Ljava/lang/Object;
            checkcast java.lang.Comparable
            aload 1 /* other */
            invokeinterface org.eclipse.collections.api.tuple.Pair.getOne:()Ljava/lang/Object;
            invokeinterface java.lang.Comparable.compareTo:(Ljava/lang/Object;)I
            istore 2 /* i */
        start local 2 // int i
         1: .line 102
            iload 2 /* i */
            ifeq 3
         2: .line 104
            iload 2 /* i */
            ireturn
         3: .line 106
      StackMap locals: int
      StackMap stack:
            aload 0 /* this */
            getfield org.eclipse.collections.impl.tuple.PairImpl.two:Ljava/lang/Object;
            checkcast java.lang.Comparable
            aload 1 /* other */
            invokeinterface org.eclipse.collections.api.tuple.Pair.getTwo:()Ljava/lang/Object;
            invokeinterface java.lang.Comparable.compareTo:(Ljava/lang/Object;)I
            ireturn
        end local 2 // int i
        end local 1 // org.eclipse.collections.api.tuple.Pair other
        end local 0 // org.eclipse.collections.impl.tuple.PairImpl this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    4     0   this  Lorg/eclipse/collections/impl/tuple/PairImpl<TT1;TT2;>;
            0    4     1  other  Lorg/eclipse/collections/api/tuple/Pair<TT1;TT2;>;
            1    4     2      i  I
    Signature: (Lorg/eclipse/collections/api/tuple/Pair<TT1;TT2;>;)I
    MethodParameters:
       Name  Flags
      other  

  public int compareTo(java.lang.Object);
    descriptor: (Ljava/lang/Object;)I
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            aload 1
            checkcast org.eclipse.collections.api.tuple.Pair
            invokevirtual org.eclipse.collections.impl.tuple.PairImpl.compareTo:(Lorg/eclipse/collections/api/tuple/Pair;)I
            ireturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public org.eclipse.collections.api.tuple.Pair swap();
    descriptor: ()Lorg/eclipse/collections/api/tuple/Pair;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokevirtual org.eclipse.collections.impl.tuple.PairImpl.swap:()Lorg/eclipse/collections/impl/tuple/PairImpl;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: <T1:Ljava/lang/Object;T2:Ljava/lang/Object;>Ljava/lang/Object;Lorg/eclipse/collections/api/tuple/Pair<TT1;TT2;>;
SourceFile: "PairImpl.java"
InnerClasses:
  public abstract Entry = java.util.Map$Entry of java.util.Map