https://openjdk.java.net/projects/openjfx/javafx-base/: OpenJFX JavaFX
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public class com.sun.javafx.event.EventDispatchChainImpl implements javafx.event.EventDispatchChain
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: com.sun.javafx.event.EventDispatchChainImpl
  super_class: java.lang.Object
{
  private static final int CAPACITY_GROWTH_FACTOR;
    descriptor: I
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 8

  private javafx.event.EventDispatcher[] dispatchers;
    descriptor: [Ljavafx/event/EventDispatcher;
    flags: (0x0002) ACC_PRIVATE

  private int[] nextLinks;
    descriptor: [I
    flags: (0x0002) ACC_PRIVATE

  private int reservedCount;
    descriptor: I
    flags: (0x0002) ACC_PRIVATE

  private int activeCount;
    descriptor: I
    flags: (0x0002) ACC_PRIVATE

  private int headIndex;
    descriptor: I
    flags: (0x0002) ACC_PRIVATE

  private int tailIndex;
    descriptor: I
    flags: (0x0002) ACC_PRIVATE

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.sun.javafx.event.EventDispatchChainImpl this
         0: .line 45
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 46
            return
        end local 0 // com.sun.javafx.event.EventDispatchChainImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/sun/javafx/event/EventDispatchChainImpl;

  public void reset();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=1
        start local 0 // com.sun.javafx.event.EventDispatchChainImpl this
         0: .line 50
            iconst_0
            istore 1 /* i */
        start local 1 // int i
         1: goto 4
         2: .line 51
      StackMap locals: int
      StackMap stack:
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.dispatchers:[Ljavafx/event/EventDispatcher;
            iload 1 /* i */
            aconst_null
            aastore
         3: .line 50
            iinc 1 /* i */ 1
      StackMap locals:
      StackMap stack:
         4: iload 1 /* i */
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.reservedCount:I
            if_icmplt 2
        end local 1 // int i
         5: .line 54
            aload 0 /* this */
            iconst_0
            putfield com.sun.javafx.event.EventDispatchChainImpl.reservedCount:I
         6: .line 55
            aload 0 /* this */
            iconst_0
            putfield com.sun.javafx.event.EventDispatchChainImpl.activeCount:I
         7: .line 56
            aload 0 /* this */
            iconst_0
            putfield com.sun.javafx.event.EventDispatchChainImpl.headIndex:I
         8: .line 57
            aload 0 /* this */
            iconst_0
            putfield com.sun.javafx.event.EventDispatchChainImpl.tailIndex:I
         9: .line 58
            return
        end local 0 // com.sun.javafx.event.EventDispatchChainImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   10     0  this  Lcom/sun/javafx/event/EventDispatchChainImpl;
            1    5     1     i  I

  public javafx.event.EventDispatchChain append(javafx.event.EventDispatcher);
    descriptor: (Ljavafx/event/EventDispatcher;)Ljavafx/event/EventDispatchChain;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // com.sun.javafx.event.EventDispatchChainImpl this
        start local 1 // javafx.event.EventDispatcher eventDispatcher
         0: .line 62
            aload 0 /* this */
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.reservedCount:I
            iconst_1
            iadd
            invokevirtual com.sun.javafx.event.EventDispatchChainImpl.ensureCapacity:(I)V
         1: .line 64
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.activeCount:I
            ifne 4
         2: .line 65
            aload 0 /* this */
            aload 1 /* eventDispatcher */
            invokevirtual com.sun.javafx.event.EventDispatchChainImpl.insertFirst:(Ljavafx/event/EventDispatcher;)V
         3: .line 66
            aload 0 /* this */
            areturn
         4: .line 69
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.dispatchers:[Ljavafx/event/EventDispatcher;
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.reservedCount:I
            aload 1 /* eventDispatcher */
            aastore
         5: .line 70
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.nextLinks:[I
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.tailIndex:I
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.reservedCount:I
            iastore
         6: .line 71
            aload 0 /* this */
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.reservedCount:I
            putfield com.sun.javafx.event.EventDispatchChainImpl.tailIndex:I
         7: .line 73
            aload 0 /* this */
            dup
            getfield com.sun.javafx.event.EventDispatchChainImpl.activeCount:I
            iconst_1
            iadd
            putfield com.sun.javafx.event.EventDispatchChainImpl.activeCount:I
         8: .line 74
            aload 0 /* this */
            dup
            getfield com.sun.javafx.event.EventDispatchChainImpl.reservedCount:I
            iconst_1
            iadd
            putfield com.sun.javafx.event.EventDispatchChainImpl.reservedCount:I
         9: .line 76
            aload 0 /* this */
            areturn
        end local 1 // javafx.event.EventDispatcher eventDispatcher
        end local 0 // com.sun.javafx.event.EventDispatchChainImpl this
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0   10     0             this  Lcom/sun/javafx/event/EventDispatchChainImpl;
            0   10     1  eventDispatcher  Ljavafx/event/EventDispatcher;
    MethodParameters:
                 Name  Flags
      eventDispatcher  final

  public javafx.event.EventDispatchChain prepend(javafx.event.EventDispatcher);
    descriptor: (Ljavafx/event/EventDispatcher;)Ljavafx/event/EventDispatchChain;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // com.sun.javafx.event.EventDispatchChainImpl this
        start local 1 // javafx.event.EventDispatcher eventDispatcher
         0: .line 81
            aload 0 /* this */
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.reservedCount:I
            iconst_1
            iadd
            invokevirtual com.sun.javafx.event.EventDispatchChainImpl.ensureCapacity:(I)V
         1: .line 83
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.activeCount:I
            ifne 4
         2: .line 84
            aload 0 /* this */
            aload 1 /* eventDispatcher */
            invokevirtual com.sun.javafx.event.EventDispatchChainImpl.insertFirst:(Ljavafx/event/EventDispatcher;)V
         3: .line 85
            aload 0 /* this */
            areturn
         4: .line 88
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.dispatchers:[Ljavafx/event/EventDispatcher;
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.reservedCount:I
            aload 1 /* eventDispatcher */
            aastore
         5: .line 89
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.nextLinks:[I
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.reservedCount:I
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.headIndex:I
            iastore
         6: .line 90
            aload 0 /* this */
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.reservedCount:I
            putfield com.sun.javafx.event.EventDispatchChainImpl.headIndex:I
         7: .line 92
            aload 0 /* this */
            dup
            getfield com.sun.javafx.event.EventDispatchChainImpl.activeCount:I
            iconst_1
            iadd
            putfield com.sun.javafx.event.EventDispatchChainImpl.activeCount:I
         8: .line 93
            aload 0 /* this */
            dup
            getfield com.sun.javafx.event.EventDispatchChainImpl.reservedCount:I
            iconst_1
            iadd
            putfield com.sun.javafx.event.EventDispatchChainImpl.reservedCount:I
         9: .line 95
            aload 0 /* this */
            areturn
        end local 1 // javafx.event.EventDispatcher eventDispatcher
        end local 0 // com.sun.javafx.event.EventDispatchChainImpl this
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0   10     0             this  Lcom/sun/javafx/event/EventDispatchChainImpl;
            0   10     1  eventDispatcher  Ljavafx/event/EventDispatcher;
    MethodParameters:
                 Name  Flags
      eventDispatcher  final

  public javafx.event.Event dispatchEvent(javafx.event.Event);
    descriptor: (Ljavafx/event/Event;)Ljavafx/event/Event;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=8, args_size=2
        start local 0 // com.sun.javafx.event.EventDispatchChainImpl this
        start local 1 // javafx.event.Event event
         0: .line 100
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.activeCount:I
            ifne 2
         1: .line 101
            aload 1 /* event */
            areturn
         2: .line 105
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.headIndex:I
            istore 2 /* savedHeadIndex */
        start local 2 // int savedHeadIndex
         3: .line 106
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.tailIndex:I
            istore 3 /* savedTailIndex */
        start local 3 // int savedTailIndex
         4: .line 107
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.activeCount:I
            istore 4 /* savedActiveCount */
        start local 4 // int savedActiveCount
         5: .line 108
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.reservedCount:I
            istore 5 /* savedReservedCount */
        start local 5 // int savedReservedCount
         6: .line 110
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.dispatchers:[Ljavafx/event/EventDispatcher;
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.headIndex:I
            aaload
            astore 6 /* nextEventDispatcher */
        start local 6 // javafx.event.EventDispatcher nextEventDispatcher
         7: .line 111
            aload 0 /* this */
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.nextLinks:[I
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.headIndex:I
            iaload
            putfield com.sun.javafx.event.EventDispatchChainImpl.headIndex:I
         8: .line 112
            aload 0 /* this */
            dup
            getfield com.sun.javafx.event.EventDispatchChainImpl.activeCount:I
            iconst_1
            isub
            putfield com.sun.javafx.event.EventDispatchChainImpl.activeCount:I
         9: .line 114
            aload 6 /* nextEventDispatcher */
            aload 1 /* event */
            aload 0 /* this */
            invokeinterface javafx.event.EventDispatcher.dispatchEvent:(Ljavafx/event/Event;Ljavafx/event/EventDispatchChain;)Ljavafx/event/Event;
        10: .line 113
            astore 7 /* returnEvent */
        start local 7 // javafx.event.Event returnEvent
        11: .line 117
            aload 0 /* this */
            iload 2 /* savedHeadIndex */
            putfield com.sun.javafx.event.EventDispatchChainImpl.headIndex:I
        12: .line 118
            aload 0 /* this */
            iload 3 /* savedTailIndex */
            putfield com.sun.javafx.event.EventDispatchChainImpl.tailIndex:I
        13: .line 119
            aload 0 /* this */
            iload 4 /* savedActiveCount */
            putfield com.sun.javafx.event.EventDispatchChainImpl.activeCount:I
        14: .line 120
            aload 0 /* this */
            iload 5 /* savedReservedCount */
            putfield com.sun.javafx.event.EventDispatchChainImpl.reservedCount:I
        15: .line 122
            aload 7 /* returnEvent */
            areturn
        end local 7 // javafx.event.Event returnEvent
        end local 6 // javafx.event.EventDispatcher nextEventDispatcher
        end local 5 // int savedReservedCount
        end local 4 // int savedActiveCount
        end local 3 // int savedTailIndex
        end local 2 // int savedHeadIndex
        end local 1 // javafx.event.Event event
        end local 0 // com.sun.javafx.event.EventDispatchChainImpl this
      LocalVariableTable:
        Start  End  Slot                 Name  Signature
            0   16     0                 this  Lcom/sun/javafx/event/EventDispatchChainImpl;
            0   16     1                event  Ljavafx/event/Event;
            3   16     2       savedHeadIndex  I
            4   16     3       savedTailIndex  I
            5   16     4     savedActiveCount  I
            6   16     5   savedReservedCount  I
            7   16     6  nextEventDispatcher  Ljavafx/event/EventDispatcher;
           11   16     7          returnEvent  Ljavafx/event/Event;
    MethodParameters:
       Name  Flags
      event  final

  private void insertFirst(javafx.event.EventDispatcher);
    descriptor: (Ljavafx/event/EventDispatcher;)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // com.sun.javafx.event.EventDispatchChainImpl this
        start local 1 // javafx.event.EventDispatcher eventDispatcher
         0: .line 126
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.dispatchers:[Ljavafx/event/EventDispatcher;
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.reservedCount:I
            aload 1 /* eventDispatcher */
            aastore
         1: .line 127
            aload 0 /* this */
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.reservedCount:I
            putfield com.sun.javafx.event.EventDispatchChainImpl.headIndex:I
         2: .line 128
            aload 0 /* this */
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.reservedCount:I
            putfield com.sun.javafx.event.EventDispatchChainImpl.tailIndex:I
         3: .line 130
            aload 0 /* this */
            iconst_1
            putfield com.sun.javafx.event.EventDispatchChainImpl.activeCount:I
         4: .line 131
            aload 0 /* this */
            dup
            getfield com.sun.javafx.event.EventDispatchChainImpl.reservedCount:I
            iconst_1
            iadd
            putfield com.sun.javafx.event.EventDispatchChainImpl.reservedCount:I
         5: .line 132
            return
        end local 1 // javafx.event.EventDispatcher eventDispatcher
        end local 0 // com.sun.javafx.event.EventDispatchChainImpl this
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0    6     0             this  Lcom/sun/javafx/event/EventDispatchChainImpl;
            0    6     1  eventDispatcher  Ljavafx/event/EventDispatcher;
    MethodParameters:
                 Name  Flags
      eventDispatcher  final

  private void ensureCapacity(int);
    descriptor: (I)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=5, locals=5, args_size=2
        start local 0 // com.sun.javafx.event.EventDispatchChainImpl this
        start local 1 // int size
         0: .line 135
            iload 1 /* size */
            bipush 8
            iadd
            iconst_1
            isub
         1: .line 136
            bipush -8
         2: .line 135
            iand
            istore 2 /* newCapacity */
        start local 2 // int newCapacity
         3: .line 137
            iload 2 /* newCapacity */
            ifne 5
         4: .line 138
            return
         5: .line 141
      StackMap locals: int
      StackMap stack:
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.dispatchers:[Ljavafx/event/EventDispatcher;
            ifnull 6
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.dispatchers:[Ljavafx/event/EventDispatcher;
            arraylength
            iload 2 /* newCapacity */
            if_icmpge 16
         6: .line 143
      StackMap locals:
      StackMap stack:
            iload 2 /* newCapacity */
            anewarray javafx.event.EventDispatcher
         7: .line 142
            astore 3 /* newDispatchers */
        start local 3 // javafx.event.EventDispatcher[] newDispatchers
         8: .line 144
            iload 2 /* newCapacity */
            newarray 10
            astore 4 /* newLinks */
        start local 4 // int[] newLinks
         9: .line 146
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.reservedCount:I
            ifle 14
        10: .line 147
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.dispatchers:[Ljavafx/event/EventDispatcher;
            iconst_0
            aload 3 /* newDispatchers */
            iconst_0
        11: .line 148
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.reservedCount:I
        12: .line 147
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
        13: .line 149
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.nextLinks:[I
            iconst_0
            aload 4 /* newLinks */
            iconst_0
            aload 0 /* this */
            getfield com.sun.javafx.event.EventDispatchChainImpl.reservedCount:I
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
        14: .line 152
      StackMap locals: javafx.event.EventDispatcher[] int[]
      StackMap stack:
            aload 0 /* this */
            aload 3 /* newDispatchers */
            putfield com.sun.javafx.event.EventDispatchChainImpl.dispatchers:[Ljavafx/event/EventDispatcher;
        15: .line 153
            aload 0 /* this */
            aload 4 /* newLinks */
            putfield com.sun.javafx.event.EventDispatchChainImpl.nextLinks:[I
        end local 4 // int[] newLinks
        end local 3 // javafx.event.EventDispatcher[] newDispatchers
        16: .line 155
      StackMap locals:
      StackMap stack:
            return
        end local 2 // int newCapacity
        end local 1 // int size
        end local 0 // com.sun.javafx.event.EventDispatchChainImpl this
      LocalVariableTable:
        Start  End  Slot            Name  Signature
            0   17     0            this  Lcom/sun/javafx/event/EventDispatchChainImpl;
            0   17     1            size  I
            3   17     2     newCapacity  I
            8   16     3  newDispatchers  [Ljavafx/event/EventDispatcher;
            9   16     4        newLinks  [I
    MethodParameters:
      Name  Flags
      size  final
}
SourceFile: "EventDispatchChainImpl.java"