Module platform
Package org.jfree.chart

Class HashUtils

java.lang.Object
org.jfree.chart.HashUtils
public class HashUtils extends Object
Some utility methods for calculating hash codes.

  • Constructor Summary

    Constructors
    Constructor
    Description
    HashUtils()
     

  • Method Summary

    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, Paint p)
    Returns a hash value based on a seed value and a paint instance.
    static int
    hashCode(int pre, Stroke s)
    Returns a hash value based on a seed value and a stroke instance.
    static int
    hashCode(int pre, Comparable c)
    Returns a hash value based on a seed value and a Comparable instance.
    static int
    hashCode(int pre, Object obj)
    Returns a hash value based on a seed value and an Object instance.
    static int
    hashCode(int pre, 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(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 Details

    • HashUtils

      public HashUtils()

  • Method Details

    • hashCodeForPaint

      public static int hashCodeForPaint(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, 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, 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, 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, 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, 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.