Java Utililty Methods Array Convert to

List of utility methods to do Array Convert to

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Description

The list of methods to do Array Convert to are organized into topic(s).

Method

int[]toInt(Integer[] arr)
to Int 
if (arr == null) {
    return null;
int[] ret = new int[arr.length];
for (int i = 0; i < arr.length; i++) {
    ret[i] = arr[i];
return ret;
...
int[]toIntArray(double[] a)
to Int Array 
int[] res = new int[a.length];
for (int i = 0; i < a.length; i++) {
    res[i] = (int) a[i];
return res;
int[]toIntArray(Integer[] data)
to Int Array 
int[] result = new int[data.length];
for (int i = 0; i < data.length; i++)
    result[i] = data[i].intValue();
return result;
Long[]toLongArray(int[] array)
to Long Array 
Long[] newArray = new Long[array.length];
for (int i = 0; i < array.length; i++) {
    newArray[i] = (long) array[i];
return newArray;
long[]toLongArray(String[] array)
Converts a String array to a long array. 
long[] newArray = new long[array.length];
for (int i = 0; i < array.length; i++) {
    if (array[i] == null) {
        throw new RuntimeException("Null value in position " + i);
    newArray[i] = Long.parseLong(array[i]);
return newArray;
...