http://commons.apache.org/proper/commons-math/: The Apache Commons Math project is a library of lightweight, self-contained mathematics and statistics components addressing the most common practical problems not immediately available in the Java programming language or commons-lang. (The Apache Software Foundation)
  • Eldar Agalarov
  • Tim Allison
  • C. Scott Ananian
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  • Rodrigo di Lorenzo Lopes
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  • Elliotte Rusty Harold
  • Dennis Hendriks
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  • Matthias Hummel
  • Curtis Jensen
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  • Sergei Lebedev
  • Bob MacCallum
  • Jake Mannix
  • Benjamin McCann
  • Patrick Meyer
  • J. Lewis Muir
  • Venkatesha Murthy
  • Christopher Nix
  • Fredrik Norin
  • Sean Owen
  • Sujit Pal
  • Todd C. Parnell
  • Andreas Rieger
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  • Bill Rossi
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class org.apache.commons.math3.util.Combinations$LexicographicComparator implements java.util.Comparator<int[]>, java.io.Serializable
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.apache.commons.math3.util.Combinations$LexicographicComparator
  super_class: java.lang.Object
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 20130906

  private final int n;
    descriptor: I
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final int k;
    descriptor: I
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  void <init>(int, int);
    descriptor: (II)V
    flags: (0x0000) 
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // org.apache.commons.math3.util.Combinations$LexicographicComparator this
        start local 1 // int n
        start local 2 // int k
         0: .line 339
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 340
            aload 0 /* this */
            iload 1 /* n */
            putfield org.apache.commons.math3.util.Combinations$LexicographicComparator.n:I
         2: .line 341
            aload 0 /* this */
            iload 2 /* k */
            putfield org.apache.commons.math3.util.Combinations$LexicographicComparator.k:I
         3: .line 342
            return
        end local 2 // int k
        end local 1 // int n
        end local 0 // org.apache.commons.math3.util.Combinations$LexicographicComparator this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lorg/apache/commons/math3/util/Combinations$LexicographicComparator;
            0    4     1     n  I
            0    4     2     k  I
    MethodParameters:
      Name  Flags
      n     
      k     

  public int compare(int[], int[]);
    descriptor: ([I[I)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=9, args_size=3
        start local 0 // org.apache.commons.math3.util.Combinations$LexicographicComparator this
        start local 1 // int[] c1
        start local 2 // int[] c2
         0: .line 354
            aload 1 /* c1 */
            arraylength
            aload 0 /* this */
            getfield org.apache.commons.math3.util.Combinations$LexicographicComparator.k:I
            if_icmpeq 2
         1: .line 355
            new org.apache.commons.math3.exception.DimensionMismatchException
            dup
            aload 1 /* c1 */
            arraylength
            aload 0 /* this */
            getfield org.apache.commons.math3.util.Combinations$LexicographicComparator.k:I
            invokespecial org.apache.commons.math3.exception.DimensionMismatchException.<init>:(II)V
            athrow
         2: .line 357
      StackMap locals:
      StackMap stack:
            aload 2 /* c2 */
            arraylength
            aload 0 /* this */
            getfield org.apache.commons.math3.util.Combinations$LexicographicComparator.k:I
            if_icmpeq 4
         3: .line 358
            new org.apache.commons.math3.exception.DimensionMismatchException
            dup
            aload 2 /* c2 */
            arraylength
            aload 0 /* this */
            getfield org.apache.commons.math3.util.Combinations$LexicographicComparator.k:I
            invokespecial org.apache.commons.math3.exception.DimensionMismatchException.<init>:(II)V
            athrow
         4: .line 362
      StackMap locals:
      StackMap stack:
            aload 1 /* c1 */
            invokestatic org.apache.commons.math3.util.MathArrays.copyOf:([I)[I
            astore 3 /* c1s */
        start local 3 // int[] c1s
         5: .line 363
            aload 3 /* c1s */
            invokestatic java.util.Arrays.sort:([I)V
         6: .line 364
            aload 2 /* c2 */
            invokestatic org.apache.commons.math3.util.MathArrays.copyOf:([I)[I
            astore 4 /* c2s */
        start local 4 // int[] c2s
         7: .line 365
            aload 4 /* c2s */
            invokestatic java.util.Arrays.sort:([I)V
         8: .line 367
            aload 0 /* this */
            aload 3 /* c1s */
            invokevirtual org.apache.commons.math3.util.Combinations$LexicographicComparator.lexNorm:([I)J
            lstore 5 /* v1 */
        start local 5 // long v1
         9: .line 368
            aload 0 /* this */
            aload 4 /* c2s */
            invokevirtual org.apache.commons.math3.util.Combinations$LexicographicComparator.lexNorm:([I)J
            lstore 7 /* v2 */
        start local 7 // long v2
        10: .line 370
            lload 5 /* v1 */
            lload 7 /* v2 */
            lcmp
            ifge 12
        11: .line 371
            iconst_m1
            ireturn
        12: .line 372
      StackMap locals: org.apache.commons.math3.util.Combinations$LexicographicComparator int[] int[] int[] int[] long long
      StackMap stack:
            lload 5 /* v1 */
            lload 7 /* v2 */
            lcmp
            ifle 14
        13: .line 373
            iconst_1
            ireturn
        14: .line 375
      StackMap locals:
      StackMap stack:
            iconst_0
            ireturn
        end local 7 // long v2
        end local 5 // long v1
        end local 4 // int[] c2s
        end local 3 // int[] c1s
        end local 2 // int[] c2
        end local 1 // int[] c1
        end local 0 // org.apache.commons.math3.util.Combinations$LexicographicComparator this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   15     0  this  Lorg/apache/commons/math3/util/Combinations$LexicographicComparator;
            0   15     1    c1  [I
            0   15     2    c2  [I
            5   15     3   c1s  [I
            7   15     4   c2s  [I
            9   15     5    v1  J
           10   15     7    v2  J
    MethodParameters:
      Name  Flags
      c1    
      c2    

  private long lexNorm(int[]);
    descriptor: ([I)J
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=6, locals=6, args_size=2
        start local 0 // org.apache.commons.math3.util.Combinations$LexicographicComparator this
        start local 1 // int[] c
         0: .line 392
            lconst_0
            lstore 2 /* ret */
        start local 2 // long ret
         1: .line 393
            iconst_0
            istore 4 /* i */
        start local 4 // int i
         2: goto 9
         3: .line 394
      StackMap locals: long int
      StackMap stack:
            aload 1 /* c */
            iload 4 /* i */
            iaload
            istore 5 /* digit */
        start local 5 // int digit
         4: .line 395
            iload 5 /* digit */
            iflt 6
         5: .line 396
            iload 5 /* digit */
            aload 0 /* this */
            getfield org.apache.commons.math3.util.Combinations$LexicographicComparator.n:I
            if_icmplt 7
         6: .line 397
      StackMap locals: int
      StackMap stack:
            new org.apache.commons.math3.exception.OutOfRangeException
            dup
            iload 5 /* digit */
            invokestatic java.lang.Integer.valueOf:(I)Ljava/lang/Integer;
            iconst_0
            invokestatic java.lang.Integer.valueOf:(I)Ljava/lang/Integer;
            aload 0 /* this */
            getfield org.apache.commons.math3.util.Combinations$LexicographicComparator.n:I
            iconst_1
            isub
            invokestatic java.lang.Integer.valueOf:(I)Ljava/lang/Integer;
            invokespecial org.apache.commons.math3.exception.OutOfRangeException.<init>:(Ljava/lang/Number;Ljava/lang/Number;Ljava/lang/Number;)V
            athrow
         7: .line 400
      StackMap locals:
      StackMap stack:
            lload 2 /* ret */
            aload 1 /* c */
            iload 4 /* i */
            iaload
            aload 0 /* this */
            getfield org.apache.commons.math3.util.Combinations$LexicographicComparator.n:I
            iload 4 /* i */
            invokestatic org.apache.commons.math3.util.ArithmeticUtils.pow:(II)I
            imul
            i2l
            ladd
            lstore 2 /* ret */
        end local 5 // int digit
         8: .line 393
            iinc 4 /* i */ 1
      StackMap locals:
      StackMap stack:
         9: iload 4 /* i */
            aload 1 /* c */
            arraylength
            if_icmplt 3
        end local 4 // int i
        10: .line 402
            lload 2 /* ret */
            lreturn
        end local 2 // long ret
        end local 1 // int[] c
        end local 0 // org.apache.commons.math3.util.Combinations$LexicographicComparator this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0   11     0   this  Lorg/apache/commons/math3/util/Combinations$LexicographicComparator;
            0   11     1      c  [I
            1   11     2    ret  J
            2   10     4      i  I
            4    8     5  digit  I
    MethodParameters:
      Name  Flags
      c     

  public int compare(java.lang.Object, java.lang.Object);
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)I
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=3, locals=3, args_size=3
         0: .line 1
            aload 0
            aload 1
            checkcast int[]
            aload 2
            checkcast int[]
            invokevirtual org.apache.commons.math3.util.Combinations$LexicographicComparator.compare:([I[I)I
            ireturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Ljava/lang/Object;Ljava/util/Comparator<[I>;Ljava/io/Serializable;
SourceFile: "Combinations.java"
NestHost: org.apache.commons.math3.util.Combinations
InnerClasses:
  private LexicographicComparator = org.apache.commons.math3.util.Combinations$LexicographicComparator of org.apache.commons.math3.util.Combinations