Java Utililty Methods ArrayList to Array

List of utility methods to do ArrayList to Array

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ArrayList to Array

Description

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

Method

byte[] byteArrayListToByteArray(ArrayList indata)
byte Array List To Byte Array

byte[] temp = new byte[indata.size()];
for (int i = 0; i < temp.length; i++)
 temp[i] = (byte) indata.get(i).byteValue();
return temp;

String byteArrayListToCharToString(ArrayList byteArrayList)
byte Array List To Char To String

String resultString = null;
for (Byte byteToProcess : byteArrayList) {
 resultString += (char) (byteToProcess.byteValue());
return resultString;

String convertArrayListToHexString(ArrayList al)
convert Array List To Hex String

StringBuffer buf = new StringBuffer();
for (Byte b : al) {
 buf.append(String.format("%02X", b));
return buf.toString();

int[] convertArrayListToIntArray(ArrayList al)
convert Array List To Int Array

int[] list = new int[al.size()];
for (int i = 0; i < al.size(); i++)
 list[i] = al.get(i);
return list;

Long[] convertIntArrayList2array(ArrayList alInput)
A utility method to convert ArrayList to int[]

Long[] outputNodeIndices = new Long[alInput.size()];
int j = 0;
for (Iterator i = alInput.iterator(); i.hasNext(); j++) {
 outputNodeIndices[j] = ((Long) i.next()).longValue();
return (outputNodeIndices);

String[] convertStringArrayListToArray(ArrayList al)
convert String Array List To Array

String[] temp = al.toArray(new String[0]);
String[] list = new String[temp.length];
System.arraycopy(temp, 0, list, 0, temp.length);
return list;

double[] doubleArrayList2Array(ArrayList a)
double Array List Array

int num = a.size();
double[] result = new double[num];
for (int i = 0; i < num; i++)
 result[i] = ((Double) a.get(i)).doubleValue();
return result;

int[] listToArray(ArrayList tempList)
list To Array

if (tempList.size() == 0) {
 return null;
int[] tempArray = new int[tempList.size()];
for (int i = 0; i < tempList.size(); i++) {
 tempArray[i] = tempList.get(i);
return tempArray;
...

int[] listToIntArray(ArrayList list)
list To Int Array

int size = list.size();
int[] result = new int[size];
for (int i = 0; i < size; i++) {
 result[i] = ((Integer) list.get(i)).intValue();
return result;

String[] toArray(ArrayList arrayList)
to Array

return arrayListToStringArray(arrayList);