Class HashUtils


  • public class HashUtils
    extends java.lang.Object
    Some utility methods for calculating hash codes.
    • Constructor Summary

      Constructors 
      Constructor Description
      HashUtils()  
    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static int hashCode​(int pre, boolean b)
      Returns a hash value based on a seed value and the value of a boolean primitive.
      static int hashCode​(int pre, double d)
      Returns a hash value based on a seed value and the value of a double primitive.
      static int hashCode​(int pre, int i)
      Returns a hash value based on a seed value and the value of an int primitive.
      static int hashCode​(int pre, java.awt.Paint p)
      Returns a hash value based on a seed value and a paint instance.
      static int hashCode​(int pre, java.awt.Stroke s)
      Returns a hash value based on a seed value and a stroke instance.
      static int hashCode​(int pre, java.lang.Comparable c)
      Returns a hash value based on a seed value and a Comparable instance.
      static int hashCode​(int pre, java.lang.Object obj)
      Returns a hash value based on a seed value and an Object instance.
      static int hashCode​(int pre, java.lang.String s)
      Returns a hash value based on a seed value and a string instance.
      static int hashCode​(int pre, BooleanList list)
      Computes a hash code for a BooleanList.
      static int hashCode​(int pre, PaintList list)
      Computes a hash code for a PaintList.
      static int hashCode​(int pre, StrokeList list)
      Computes a hash code for a StrokeList.
      static int hashCodeForDoubleArray​(double[] a)
      Returns a hash code for a double[] instance.
      static int hashCodeForPaint​(java.awt.Paint p)
      Returns a hash code for a Paint instance.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • HashUtils

        public HashUtils()
    • Method Detail

      • hashCodeForPaint

        public static int hashCodeForPaint​(java.awt.Paint p)
        Returns a hash code for a Paint instance. If p is null, this method returns zero.
        Parameters:
        p - the paint (null permitted).
        Returns:
        The hash code.
      • hashCodeForDoubleArray

        public static int hashCodeForDoubleArray​(double[] a)
        Returns a hash code for a double[] instance. If the array is null, this method returns zero.
        Parameters:
        a - the array (null permitted).
        Returns:
        The hash code.
      • hashCode

        public static int hashCode​(int pre,
                                   boolean b)
        Returns a hash value based on a seed value and the value of a boolean primitive.
        Parameters:
        pre - the seed value.
        b - the boolean value.
        Returns:
        A hash value.
      • hashCode

        public static int hashCode​(int pre,
                                   int i)
        Returns a hash value based on a seed value and the value of an int primitive.
        Parameters:
        pre - the seed value.
        i - the int value.
        Returns:
        A hash value.
      • hashCode

        public static int hashCode​(int pre,
                                   double d)
        Returns a hash value based on a seed value and the value of a double primitive.
        Parameters:
        pre - the seed value.
        d - the double value.
        Returns:
        A hash value.
      • hashCode

        public static int hashCode​(int pre,
                                   java.awt.Paint p)
        Returns a hash value based on a seed value and a paint instance.
        Parameters:
        pre - the seed value.
        p - the paint (null permitted).
        Returns:
        A hash value.
      • hashCode

        public static int hashCode​(int pre,
                                   java.awt.Stroke s)
        Returns a hash value based on a seed value and a stroke instance.
        Parameters:
        pre - the seed value.
        s - the stroke (null permitted).
        Returns:
        A hash value.
      • hashCode

        public static int hashCode​(int pre,
                                   java.lang.String s)
        Returns a hash value based on a seed value and a string instance.
        Parameters:
        pre - the seed value.
        s - the string (null permitted).
        Returns:
        A hash value.
      • hashCode

        public static int hashCode​(int pre,
                                   java.lang.Comparable c)
        Returns a hash value based on a seed value and a Comparable instance.
        Parameters:
        pre - the seed value.
        c - the comparable (null permitted).
        Returns:
        A hash value.
      • hashCode

        public static int hashCode​(int pre,
                                   java.lang.Object obj)
        Returns a hash value based on a seed value and an Object instance.
        Parameters:
        pre - the seed value.
        obj - the object (null permitted).
        Returns:
        A hash value.
      • hashCode

        public static int hashCode​(int pre,
                                   BooleanList list)
        Computes a hash code for a BooleanList. In the latest version of JCommon, the BooleanList class should implement the hashCode() method correctly, but we compute it here anyway so that we can work with older versions of JCommon (back to 1.0.0).
        Parameters:
        pre - the seed value.
        list - the list (null permitted).
        Returns:
        The hash code.
      • hashCode

        public static int hashCode​(int pre,
                                   PaintList list)
        Computes a hash code for a PaintList. In the latest version of JCommon, the PaintList class should implement the hashCode() method correctly, but we compute it here anyway so that we can work with older versions of JCommon (back to 1.0.0).
        Parameters:
        pre - the seed value.
        list - the list (null permitted).
        Returns:
        The hash code.
      • hashCode

        public static int hashCode​(int pre,
                                   StrokeList list)
        Computes a hash code for a StrokeList. In the latest version of JCommon, the StrokeList class should implement the hashCode() method correctly, but we compute it here anyway so that we can work with older versions of JCommon (back to 1.0.0).
        Parameters:
        pre - the seed value.
        list - the list (null permitted).
        Returns:
        The hash code.