Increasing size of array

Question

is there anyway to increase the size of the array without losing previous information
for example
//String[] words = new String[2];
//words[0] = "Hello";
//words[1] = "Byes";
if i do this
//words = new String[3];
//words[2] = "goodbye";
then the previous two will be lost... is there anyway to go around this... thank you

Answer 1

Option A: use a Vector
Option B: do like Vector does (look at the source to Vector)String[] words = new String[2];
words[0] = "Hello";
words[1] = "Byes";
String tmp = new String[3]     // make a new array
for (int x=0; x<words.length; x++) tmp[x]=words[x];  // copy all old to new array
words = tmp;                   // point variable words to new array
words[3]="goodbye";            // fill last elementVector does this a lot more efficiently than this.