Convert array of object to array of primitive? : Arrays « Collections Data Structure « Java

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Java » Collections Data Structure » Arrays

Convert array of object to array of primitive?


 

 

import org.apache.commons.lang.ArrayUtils;



public class Main {



  public static void main(String[] args) {

    Integer[] integers = { new Integer(1), new Integer(2), new Integer(3), new Integer(5),

        new Integer(8), new Integer(13), new Integer(21), new Integer(34), new Integer(55) };



    int[] fibbos = ArrayUtils.toPrimitive(integers);

    System.out.println(ArrayUtils.toString(fibbos));

  }

}

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3.	Demonstrate use of Arrays.sort on Booleans
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5.	Convert Array to Collection
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19.	Compare two byte type arrays
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21.	Compare two short type arrays
22.	Compare two int type arrays
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26.	Filling Elements in an Array: boolean type
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32.	Filling Elements in an Array: float type
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34.	filling object arrays:
35.	fill to a contiguous range of elements in an array: boolean array
36.	Fill to a contiguous range of elements in an array: byte array
37.	Fill to a contiguous range of elements in an array: char array
38.	Fill to a contiguous range of elements in an array: short array
39.	Fill to a contiguous range of elements in an array: int array
40.	Fill to a contiguous range of elements in an array: long array
41.	Fill to a contiguous range of elements in an array: float array
42.	Use Arrays.asList() to convert Array to List
43.	Merge (or add) two arrays into one
44.	Fill to a contiguous range of elements in an array: double array
45.	Fill to a contiguous range of elements in an array: String array
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50.	Shifting Elements in an Array: Shift all elements left by one
51.	Use java.util.Arrays.deepToString() to dump the multi-dimensional arrays
52.	use Arrays.copyOf to copy array
53.	If the element is a primitive type.
54.	When comparing Object arrays, null elements are equal. If the elements are not null, Object.equals() is used.
55.	Comparing Arrays: null arrays are equal
56.	Compare two boolean arrays and null

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