Class JDK5Utils


  • public class JDK5Utils
    extends Object
    Utility methods ported from later JDK versions for use with JDK 5.
    Since:
    1.2
    Author:
    Keegan Witt
    • Method Detail

      • Arrays_copyOf

        public static <T> T[] Arrays_copyOf​(T[] original,
                                            int newLength)
        Copies the specified array, truncating or padding with nulls (if necessary) so the copy has the specified length. For all indices that are valid in both the original array and the copy, the two arrays will contain identical values. For any indices that are valid in the copy but not the original, the copy will contain null. Such indices will exist if and only if the specified length is greater than that of the original array. The resulting array is of exactly the same class as the original array.
        Parameters:
        original - the array to be copied
        newLength - the length of the copy to be returned
        Returns:
        a copy of the original array, truncated or padded with nulls to obtain the specified length
        Throws:
        NegativeArraySizeException - if newLength is negative
        NullPointerException - if original is null
      • Arrays_copyOf

        public static <T,​U> T[] Arrays_copyOf​(U[] original,
                                                    int newLength,
                                                    Class<? extends T[]> newType)
        Copies the specified array, truncating or padding with nulls (if necessary) so the copy has the specified length. For all indices that are valid in both the original array and the copy, the two arrays will contain identical values. For any indices that are valid in the copy but not the original, the copy will contain null. Such indices will exist if and only if the specified length is greater than that of the original array. The resulting array is of the class newType.
        Parameters:
        original - the array to be copied
        newLength - the length of the copy to be returned
        newType - the class of the copy to be returned
        Returns:
        a copy of the original array, truncated or padded with nulls to obtain the specified length
        Throws:
        NegativeArraySizeException - if newLength is negative
        NullPointerException - if original is null
        ArrayStoreException - if an element copied from original is not of a runtime type that can be stored in an array of class newType