I need to convert an array list of object type into a normal arrays.
ArrayList<object> list = new ArrayList<Object>();
list.add(4);
list.add(56);
list.add("two");
What is the easiest way to do this?
how can we change an existing array to an arraylist?
String st[]=new String[];
Integer in[]=new Integer[];
how can i convert this array into an array list of Object type so i can have both this arrays in one arraylist?
Suppose arrlist is an ArrayList. To convert it into array,try the follwing code.
Integer list[] = new Integer[arrlist.size()]; //arrlist is an ArrayList
list = arrlist.toArray(list2);
FOr more detailed example try this tutorial :
You can use toArray()
ArrayList<Integer> list=new ArrayList<Integer>();
list.add(4);
list.add(56);
Integer[] arr=list.toArray(new Integer[list.size()]);
Try this:
import org.apache.commons.lang.ArrayUtils;
int[] intArray = ArrayUtils.toPrimitive(list.toArray(new Integer[0]))
This approach will make two complete copies of the sequence: one Integer[] created by toArray, and one int[] created inside toPrimitive
arraylist can be converted into array using toArray() mehod in java.
