How to make array but don't know the length?

Question

normally if want want an array is double[] d = new double[6], how if the length still don't know?
thx..

Answer 1

eadelarosa wrote:
String [] myArray1 = new String [] {};the above creates a non-null array of Strings called "myArray".
ArrayList <String> al = new ArrayList <String> (10);
String [] myArray2 = null;
myArray2 = arrayList.toArray();or
myArray2 = arrayList.toArray(new String [arrayList.size()]);the above creates an array of String for you based on the contents of ArrayList, which in this case is 10 objects of type String.
of course, there are many ways where you can create array of unknown length.
Edited by: eadelarosa on May 28, 2009 10:26 PMMy advice is to stick with the list and not convert it to an array unless you have no other choice. Love your collections!