http://xmlgraphics.apache.org/fop/: Apache FOP (Formatting Objects Processor) is the world's first print formatter driven by XSL formatting objects (XSL-FO) and the world's first output independent formatter. It is a Java application that reads a formatting object (FO) tree and renders the resulting pages to a specified output. Output formats currently supported include PDF, PCL, PS, AFP, TIFF, PNG, SVG, XML (area tree representation), Print, AWT and TXT. The primary output target is PDF. (Apache Software Foundation) 
public class org.apache.fop.pdf.DestinationComparator implements java.util.Comparator, java.io.Serializable
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.apache.fop.pdf.DestinationComparator
  super_class: java.lang.Object
{
  static final long serialVersionUID;
    descriptor: J
    flags: (0x0018) ACC_STATIC, ACC_FINAL
    ConstantValue: 0

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.fop.pdf.DestinationComparator this
         0: .line 26
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.apache.fop.pdf.DestinationComparator this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/fop/pdf/DestinationComparator;

  public int compare(java.lang.Object, java.lang.Object);
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=5, args_size=3
        start local 0 // org.apache.fop.pdf.DestinationComparator this
        start local 1 // java.lang.Object obj1
        start local 2 // java.lang.Object obj2
         0: .line 35
            aload 1 /* obj1 */
            instanceof org.apache.fop.pdf.PDFDestination
            ifeq 4
            aload 2 /* obj2 */
            instanceof org.apache.fop.pdf.PDFDestination
            ifeq 4
         1: .line 36
            aload 1 /* obj1 */
            checkcast org.apache.fop.pdf.PDFDestination
            astore 3 /* dest1 */
        start local 3 // org.apache.fop.pdf.PDFDestination dest1
         2: .line 37
            aload 2 /* obj2 */
            checkcast org.apache.fop.pdf.PDFDestination
            astore 4 /* dest2 */
        start local 4 // org.apache.fop.pdf.PDFDestination dest2
         3: .line 38
            aload 3 /* dest1 */
            invokevirtual org.apache.fop.pdf.PDFDestination.getIDRef:()Ljava/lang/String;
            aload 4 /* dest2 */
            invokevirtual org.apache.fop.pdf.PDFDestination.getIDRef:()Ljava/lang/String;
            invokevirtual java.lang.String.compareTo:(Ljava/lang/String;)I
            ireturn
        end local 4 // org.apache.fop.pdf.PDFDestination dest2
        end local 3 // org.apache.fop.pdf.PDFDestination dest1
         4: .line 40
      StackMap locals:
      StackMap stack:
            iconst_0
            ireturn
        end local 2 // java.lang.Object obj2
        end local 1 // java.lang.Object obj1
        end local 0 // org.apache.fop.pdf.DestinationComparator this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    5     0   this  Lorg/apache/fop/pdf/DestinationComparator;
            0    5     1   obj1  Ljava/lang/Object;
            0    5     2   obj2  Ljava/lang/Object;
            2    4     3  dest1  Lorg/apache/fop/pdf/PDFDestination;
            3    4     4  dest2  Lorg/apache/fop/pdf/PDFDestination;
    MethodParameters:
      Name  Flags
      obj1  
      obj2  
}
SourceFile: "DestinationComparator.java"