Extend the size of an array : Arrays Utilities « Collections « Java Tutorial

1. Java Tutorial
2. Collections
3. Arrays Utilities

public class Main {
  public static void main(String[] args) {
    String[] names = new String[] { "A", "B", "C" };

    String[] extended = new String[5];

    extended[3] = "D";
    extended[4] = "F";

    System.arraycopy(names, 0, extended, 0, names.length);

    for (String str : extended)
      System.out.println(str);
  }
}
/*
A
B
C
D
F
*/