https://openjdk.java.net/ 
public class sun.awt.windows.WTrayIconPeer extends sun.awt.windows.WObjectPeer implements java.awt.peer.TrayIconPeer
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: sun.awt.windows.WTrayIconPeer
  super_class: sun.awt.windows.WObjectPeer
{
  static final int TRAY_ICON_WIDTH;
    descriptor: I
    flags: (0x0018) ACC_STATIC, ACC_FINAL
    ConstantValue: 16

  static final int TRAY_ICON_HEIGHT;
    descriptor: I
    flags: (0x0018) ACC_STATIC, ACC_FINAL
    ConstantValue: 16

  static final int TRAY_ICON_MASK_SIZE;
    descriptor: I
    flags: (0x0018) ACC_STATIC, ACC_FINAL
    ConstantValue: 32

  sun.awt.windows.WTrayIconPeer$IconObserver observer;
    descriptor: Lsun/awt/windows/WTrayIconPeer$IconObserver;
    flags: (0x0000) 

  boolean firstUpdate;
    descriptor: Z
    flags: (0x0000) 

  java.awt.Frame popupParent;
    descriptor: Ljava/awt/Frame;
    flags: (0x0000) 

  java.awt.PopupMenu popup;
    descriptor: Ljava/awt/PopupMenu;
    flags: (0x0000) 

  protected void disposeImpl();
    descriptor: ()V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // sun.awt.windows.WTrayIconPeer this
         0: .line 52
            aload 0 /* this */
            getfield sun.awt.windows.WTrayIconPeer.popupParent:Ljava/awt/Frame;
            ifnull 2
         1: .line 53
            aload 0 /* this */
            getfield sun.awt.windows.WTrayIconPeer.popupParent:Ljava/awt/Frame;
            invokevirtual java.awt.Frame.dispose:()V
         2: .line 55
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield sun.awt.windows.WTrayIconPeer.popupParent:Ljava/awt/Frame;
            invokevirtual java.awt.Frame.dispose:()V
         3: .line 56
            aload 0 /* this */
            invokevirtual sun.awt.windows.WTrayIconPeer._dispose:()V
         4: .line 57
            aload 0 /* this */
            getfield sun.awt.windows.WTrayIconPeer.target:Ljava/lang/Object;
            aload 0 /* this */
            invokestatic sun.awt.windows.WToolkit.targetDisposedPeer:(Ljava/lang/Object;Ljava/lang/Object;)V
         5: .line 58
            return
        end local 0 // sun.awt.windows.WTrayIconPeer this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    6     0  this  Lsun/awt/windows/WTrayIconPeer;

  void <init>(java.awt.TrayIcon);
    descriptor: (Ljava/awt/TrayIcon;)V
    flags: (0x0000) 
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // sun.awt.windows.WTrayIconPeer this
        start local 1 // java.awt.TrayIcon target
         0: .line 60
            aload 0 /* this */
            invokespecial sun.awt.windows.WObjectPeer.<init>:()V
         1: .line 46
            aload 0 /* this */
            new sun.awt.windows.WTrayIconPeer$IconObserver
            dup
            aload 0 /* this */
            invokespecial sun.awt.windows.WTrayIconPeer$IconObserver.<init>:(Lsun/awt/windows/WTrayIconPeer;)V
            putfield sun.awt.windows.WTrayIconPeer.observer:Lsun/awt/windows/WTrayIconPeer$IconObserver;
         2: .line 47
            aload 0 /* this */
            iconst_1
            putfield sun.awt.windows.WTrayIconPeer.firstUpdate:Z
         3: .line 48
            aload 0 /* this */
            new java.awt.Frame
            dup
            ldc "PopupMessageWindow"
            invokespecial java.awt.Frame.<init>:(Ljava/lang/String;)V
            putfield sun.awt.windows.WTrayIconPeer.popupParent:Ljava/awt/Frame;
         4: .line 61
            aload 0 /* this */
            aload 1 /* target */
            putfield sun.awt.windows.WTrayIconPeer.target:Ljava/lang/Object;
         5: .line 62
            aload 0 /* this */
            getfield sun.awt.windows.WTrayIconPeer.popupParent:Ljava/awt/Frame;
            invokevirtual java.awt.Frame.addNotify:()V
         6: .line 63
            aload 0 /* this */
            invokevirtual sun.awt.windows.WTrayIconPeer.create:()V
         7: .line 64
            aload 0 /* this */
            invokevirtual sun.awt.windows.WTrayIconPeer.updateImage:()V
         8: .line 65
            return
        end local 1 // java.awt.TrayIcon target
        end local 0 // sun.awt.windows.WTrayIconPeer this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    9     0    this  Lsun/awt/windows/WTrayIconPeer;
            0    9     1  target  Ljava/awt/TrayIcon;
    MethodParameters:
        Name  Flags
      target  

  public void updateImage();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=1
        start local 0 // sun.awt.windows.WTrayIconPeer this
         0: .line 68
            aload 0 /* this */
            getfield sun.awt.windows.WTrayIconPeer.target:Ljava/lang/Object;
            checkcast java.awt.TrayIcon
            invokevirtual java.awt.TrayIcon.getImage:()Ljava/awt/Image;
            astore 1 /* image */
        start local 1 // java.awt.Image image
         1: .line 69
            aload 1 /* image */
            ifnull 3
         2: .line 70
            aload 0 /* this */
            aload 1 /* image */
            invokevirtual sun.awt.windows.WTrayIconPeer.updateNativeImage:(Ljava/awt/Image;)V
         3: .line 72
      StackMap locals: java.awt.Image
      StackMap stack:
            return
        end local 1 // java.awt.Image image
        end local 0 // sun.awt.windows.WTrayIconPeer this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    4     0   this  Lsun/awt/windows/WTrayIconPeer;
            1    4     1  image  Ljava/awt/Image;

  public native void setToolTip(java.lang.String);
    descriptor: (Ljava/lang/String;)V
    flags: (0x0101) ACC_PUBLIC, ACC_NATIVE
    MethodParameters:
         Name  Flags
      tooltip  

  public synchronized void showPopupMenu(int, int);
    descriptor: (II)V
    flags: (0x0021) ACC_PUBLIC, ACC_SYNCHRONIZED
    Code:
      stack=6, locals=3, args_size=3
        start local 0 // sun.awt.windows.WTrayIconPeer this
        start local 1 // int x
        start local 2 // int y
         0: .line 77
            aload 0 /* this */
            invokevirtual sun.awt.windows.WTrayIconPeer.isDisposed:()Z
            ifeq 2
         1: .line 78
            return
         2: .line 80
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield sun.awt.windows.WTrayIconPeer.target:Ljava/lang/Object;
            new sun.awt.windows.WTrayIconPeer$1
            dup
            aload 0 /* this */
            iload 1 /* x */
            iload 2 /* y */
            invokespecial sun.awt.windows.WTrayIconPeer$1.<init>:(Lsun/awt/windows/WTrayIconPeer;II)V
            invokestatic sun.awt.SunToolkit.executeOnEventHandlerThread:(Ljava/lang/Object;Ljava/lang/Runnable;)V
         3: .line 97
            return
        end local 2 // int y
        end local 1 // int x
        end local 0 // sun.awt.windows.WTrayIconPeer this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lsun/awt/windows/WTrayIconPeer;
            0    4     1     x  I
            0    4     2     y  I
    MethodParameters:
      Name  Flags
      x     final
      y     final

  public void displayMessage(java.lang.String, java.lang.String, java.lang.String);
    descriptor: (Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=4, args_size=4
        start local 0 // sun.awt.windows.WTrayIconPeer this
        start local 1 // java.lang.String caption
        start local 2 // java.lang.String text
        start local 3 // java.lang.String messageType
         0: .line 101
            aload 1 /* caption */
            ifnonnull 2
         1: .line 102
            ldc ""
            astore 1 /* caption */
         2: .line 104
      StackMap locals:
      StackMap stack:
            aload 2 /* text */
            ifnonnull 4
         3: .line 105
            ldc ""
            astore 2 /* text */
         4: .line 107
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 1 /* caption */
            aload 2 /* text */
            aload 3 /* messageType */
            invokevirtual sun.awt.windows.WTrayIconPeer._displayMessage:(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V
         5: .line 108
            return
        end local 3 // java.lang.String messageType
        end local 2 // java.lang.String text
        end local 1 // java.lang.String caption
        end local 0 // sun.awt.windows.WTrayIconPeer this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    6     0         this  Lsun/awt/windows/WTrayIconPeer;
            0    6     1      caption  Ljava/lang/String;
            0    6     2         text  Ljava/lang/String;
            0    6     3  messageType  Ljava/lang/String;
    MethodParameters:
             Name  Flags
      caption      
      text         
      messageType  

  synchronized void updateNativeImage(java.awt.Image);
    descriptor: (Ljava/awt/Image;)V
    flags: (0x0020) ACC_SYNCHRONIZED
    Code:
      stack=7, locals=6, args_size=2
        start local 0 // sun.awt.windows.WTrayIconPeer this
        start local 1 // java.awt.Image image
         0: .line 116
            aload 0 /* this */
            invokevirtual sun.awt.windows.WTrayIconPeer.isDisposed:()Z
            ifeq 2
         1: .line 117
            return
         2: .line 119
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield sun.awt.windows.WTrayIconPeer.target:Ljava/lang/Object;
            checkcast java.awt.TrayIcon
            invokevirtual java.awt.TrayIcon.isImageAutoSize:()Z
            istore 2 /* autosize */
        start local 2 // boolean autosize
         3: .line 121
            new java.awt.image.BufferedImage
            dup
            bipush 16
            bipush 16
         4: .line 122
            iconst_2
         5: .line 121
            invokespecial java.awt.image.BufferedImage.<init>:(III)V
            astore 3 /* bufImage */
        start local 3 // java.awt.image.BufferedImage bufImage
         6: .line 123
            aload 3 /* bufImage */
            invokevirtual java.awt.image.BufferedImage.createGraphics:()Ljava/awt/Graphics2D;
            astore 4 /* gr */
        start local 4 // java.awt.Graphics2D gr
         7: .line 124
            aload 4 /* gr */
            ifnull 25
         8: .line 126
            aload 4 /* gr */
            invokevirtual java.awt.Graphics2D.setPaintMode:()V
         9: .line 128
            aload 4 /* gr */
            aload 1 /* image */
            iconst_0
            iconst_0
            iload 2 /* autosize */
            ifeq 10
            bipush 16
            goto 11
      StackMap locals: sun.awt.windows.WTrayIconPeer java.awt.Image int java.awt.image.BufferedImage java.awt.Graphics2D
      StackMap stack: java.awt.Graphics2D java.awt.Image int int
        10: aload 1 /* image */
            aload 0 /* this */
            getfield sun.awt.windows.WTrayIconPeer.observer:Lsun/awt/windows/WTrayIconPeer$IconObserver;
            invokevirtual java.awt.Image.getWidth:(Ljava/awt/image/ImageObserver;)I
        11: .line 129
      StackMap locals: sun.awt.windows.WTrayIconPeer java.awt.Image int java.awt.image.BufferedImage java.awt.Graphics2D
      StackMap stack: java.awt.Graphics2D java.awt.Image int int int
            iload 2 /* autosize */
            ifeq 12
            bipush 16
            goto 13
      StackMap locals: sun.awt.windows.WTrayIconPeer java.awt.Image int java.awt.image.BufferedImage java.awt.Graphics2D
      StackMap stack: java.awt.Graphics2D java.awt.Image int int int
        12: aload 1 /* image */
            aload 0 /* this */
            getfield sun.awt.windows.WTrayIconPeer.observer:Lsun/awt/windows/WTrayIconPeer$IconObserver;
            invokevirtual java.awt.Image.getHeight:(Ljava/awt/image/ImageObserver;)I
      StackMap locals: sun.awt.windows.WTrayIconPeer java.awt.Image int java.awt.image.BufferedImage java.awt.Graphics2D
      StackMap stack: java.awt.Graphics2D java.awt.Image int int int int
        13: aload 0 /* this */
            getfield sun.awt.windows.WTrayIconPeer.observer:Lsun/awt/windows/WTrayIconPeer$IconObserver;
        14: .line 128
            invokevirtual java.awt.Graphics2D.drawImage:(Ljava/awt/Image;IIIILjava/awt/image/ImageObserver;)Z
            pop
        15: .line 131
            aload 0 /* this */
            aload 3 /* bufImage */
            invokevirtual sun.awt.windows.WTrayIconPeer.createNativeImage:(Ljava/awt/image/BufferedImage;)V
        16: .line 133
            aload 0 /* this */
            aload 0 /* this */
            getfield sun.awt.windows.WTrayIconPeer.firstUpdate:Z
            ifeq 17
            iconst_0
            goto 18
      StackMap locals:
      StackMap stack: sun.awt.windows.WTrayIconPeer
        17: iconst_1
      StackMap locals: sun.awt.windows.WTrayIconPeer java.awt.Image int java.awt.image.BufferedImage java.awt.Graphics2D
      StackMap stack: sun.awt.windows.WTrayIconPeer int
        18: invokevirtual sun.awt.windows.WTrayIconPeer.updateNativeIcon:(Z)V
        19: .line 134
            aload 0 /* this */
            getfield sun.awt.windows.WTrayIconPeer.firstUpdate:Z
            ifeq 24
            aload 0 /* this */
            iconst_0
            putfield sun.awt.windows.WTrayIconPeer.firstUpdate:Z
        20: .line 136
            goto 24
      StackMap locals:
      StackMap stack: java.lang.Throwable
        21: astore 5
        22: .line 137
            aload 4 /* gr */
            invokevirtual java.awt.Graphics2D.dispose:()V
        23: .line 138
            aload 5
            athrow
        24: .line 137
      StackMap locals:
      StackMap stack:
            aload 4 /* gr */
            invokevirtual java.awt.Graphics2D.dispose:()V
        25: .line 140
      StackMap locals:
      StackMap stack:
            return
        end local 4 // java.awt.Graphics2D gr
        end local 3 // java.awt.image.BufferedImage bufImage
        end local 2 // boolean autosize
        end local 1 // java.awt.Image image
        end local 0 // sun.awt.windows.WTrayIconPeer this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0   26     0      this  Lsun/awt/windows/WTrayIconPeer;
            0   26     1     image  Ljava/awt/Image;
            3   26     2  autosize  Z
            6   26     3  bufImage  Ljava/awt/image/BufferedImage;
            7   26     4        gr  Ljava/awt/Graphics2D;
      Exception table:
        from    to  target  type
           8    21      21  any
    MethodParameters:
       Name  Flags
      image  

  void createNativeImage(java.awt.image.BufferedImage);
    descriptor: (Ljava/awt/image/BufferedImage;)V
    flags: (0x0000) 
    Code:
      stack=6, locals=10, args_size=2
        start local 0 // sun.awt.windows.WTrayIconPeer this
        start local 1 // java.awt.image.BufferedImage bimage
         0: .line 143
            aload 1 /* bimage */
            invokevirtual java.awt.image.BufferedImage.getRaster:()Ljava/awt/image/WritableRaster;
            astore 2 /* raster */
        start local 2 // java.awt.image.Raster raster
         1: .line 144
            bipush 32
            newarray 8
            astore 3 /* andMask */
        start local 3 // byte[] andMask
         2: .line 145
            aload 2 /* raster */
            invokevirtual java.awt.image.Raster.getDataBuffer:()Ljava/awt/image/DataBuffer;
            checkcast java.awt.image.DataBufferInt
            invokevirtual java.awt.image.DataBufferInt.getData:()[I
            astore 4 /* pixels */
        start local 4 // int[] pixels
         3: .line 146
            aload 4 /* pixels */
            arraylength
            istore 5 /* npixels */
        start local 5 // int npixels
         4: .line 147
            aload 2 /* raster */
            invokevirtual java.awt.image.Raster.getWidth:()I
            istore 6 /* ficW */
        start local 6 // int ficW
         5: .line 149
            iconst_0
            istore 7 /* i */
        start local 7 // int i
         6: goto 13
         7: .line 150
      StackMap locals: sun.awt.windows.WTrayIconPeer java.awt.image.BufferedImage java.awt.image.Raster byte[] int[] int int int
      StackMap stack:
            iload 7 /* i */
            bipush 8
            idiv
            istore 8 /* ibyte */
        start local 8 // int ibyte
         8: .line 151
            iconst_1
            bipush 7
            iload 7 /* i */
            bipush 8
            irem
            isub
            ishl
            istore 9 /* omask */
        start local 9 // int omask
         9: .line 153
            aload 4 /* pixels */
            iload 7 /* i */
            iaload
            ldc -16777216
            iand
            ifne 12
        10: .line 155
            iload 8 /* ibyte */
            aload 3 /* andMask */
            arraylength
            if_icmpge 12
        11: .line 156
            aload 3 /* andMask */
            iload 8 /* ibyte */
            dup2
            baload
            iload 9 /* omask */
            ior
            i2b
            bastore
        end local 9 // int omask
        end local 8 // int ibyte
        12: .line 149
      StackMap locals:
      StackMap stack:
            iinc 7 /* i */ 1
      StackMap locals:
      StackMap stack:
        13: iload 7 /* i */
            iload 5 /* npixels */
            if_icmplt 7
        end local 7 // int i
        14: .line 161
            aload 2 /* raster */
            instanceof sun.awt.image.IntegerComponentRaster
            ifeq 16
        15: .line 162
            aload 2 /* raster */
            checkcast sun.awt.image.IntegerComponentRaster
            invokevirtual sun.awt.image.IntegerComponentRaster.getScanlineStride:()I
            istore 6 /* ficW */
        16: .line 164
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 1 /* bimage */
            invokevirtual java.awt.image.BufferedImage.getRaster:()Ljava/awt/image/WritableRaster;
            invokevirtual java.awt.image.WritableRaster.getDataBuffer:()Ljava/awt/image/DataBuffer;
            checkcast java.awt.image.DataBufferInt
            invokevirtual java.awt.image.DataBufferInt.getData:()[I
        17: .line 165
            aload 3 /* andMask */
            iload 6 /* ficW */
            aload 2 /* raster */
            invokevirtual java.awt.image.Raster.getWidth:()I
            aload 2 /* raster */
            invokevirtual java.awt.image.Raster.getHeight:()I
        18: .line 164
            invokevirtual sun.awt.windows.WTrayIconPeer.setNativeIcon:([I[BIII)V
        19: .line 166
            return
        end local 6 // int ficW
        end local 5 // int npixels
        end local 4 // int[] pixels
        end local 3 // byte[] andMask
        end local 2 // java.awt.image.Raster raster
        end local 1 // java.awt.image.BufferedImage bimage
        end local 0 // sun.awt.windows.WTrayIconPeer this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0   20     0     this  Lsun/awt/windows/WTrayIconPeer;
            0   20     1   bimage  Ljava/awt/image/BufferedImage;
            1   20     2   raster  Ljava/awt/image/Raster;
            2   20     3  andMask  [B
            3   20     4   pixels  [I
            4   20     5  npixels  I
            5   20     6     ficW  I
            6   14     7        i  I
            8   12     8    ibyte  I
            9   12     9    omask  I
    MethodParameters:
        Name  Flags
      bimage  

  void postEvent(java.awt.AWTEvent);
    descriptor: (Ljava/awt/AWTEvent;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // sun.awt.windows.WTrayIconPeer this
        start local 1 // java.awt.AWTEvent event
         0: .line 169
            aload 0 /* this */
            getfield sun.awt.windows.WTrayIconPeer.target:Ljava/lang/Object;
            invokestatic sun.awt.windows.WToolkit.targetToAppContext:(Ljava/lang/Object;)Lsun/awt/AppContext;
            aload 1 /* event */
            invokestatic sun.awt.windows.WToolkit.postEvent:(Lsun/awt/AppContext;Ljava/awt/AWTEvent;)V
         1: .line 170
            return
        end local 1 // java.awt.AWTEvent event
        end local 0 // sun.awt.windows.WTrayIconPeer this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    2     0   this  Lsun/awt/windows/WTrayIconPeer;
            0    2     1  event  Ljava/awt/AWTEvent;
    MethodParameters:
       Name  Flags
      event  

  native void create();
    descriptor: ()V
    flags: (0x0100) ACC_NATIVE

  synchronized native void _dispose();
    descriptor: ()V
    flags: (0x0120) ACC_SYNCHRONIZED, ACC_NATIVE

  native void updateNativeIcon(boolean);
    descriptor: (Z)V
    flags: (0x0100) ACC_NATIVE
    MethodParameters:
          Name  Flags
      doUpdate  

  native void setNativeIcon(int[], byte[], int, int, int);
    descriptor: ([I[BIII)V
    flags: (0x0100) ACC_NATIVE
    MethodParameters:
             Name  Flags
      rData        
      andMask      
      nScanStride  
      width        
      height       

  native void _displayMessage(java.lang.String, java.lang.String, java.lang.String);
    descriptor: (Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V
    flags: (0x0100) ACC_NATIVE
    MethodParameters:
             Name  Flags
      caption      
      text         
      messageType  

  public long getData();
    descriptor: ()J
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=1, args_size=1
         0: .line 1
            aload 0
            invokespecial sun.awt.windows.WObjectPeer.getData:()J
            lreturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public java.lang.Object getTarget();
    descriptor: ()Ljava/lang/Object;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokespecial sun.awt.windows.WObjectPeer.getTarget:()Ljava/lang/Object;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
SourceFile: "WTrayIconPeer.java"
NestMembers:
  sun.awt.windows.WTrayIconPeer$1  sun.awt.windows.WTrayIconPeer$IconObserver
InnerClasses:
  sun.awt.windows.WTrayIconPeer$1
  IconObserver = sun.awt.windows.WTrayIconPeer$IconObserver of sun.awt.windows.WTrayIconPeer