Here is the method I came up with, please let me as it works fine or not,
public class Main {
   public void extendArraySize() {
      String[] names = new String[] {"c", "b", "a"};
      String[] extended = new String[5];
      extended[3] = "p";
      extended[4] = "q";
      System.arraycopy(names, 0, extended, 0, names.length);
      
      for (String str : extended) System.out.println(str);
   } 
   public static void main(String[] args) {
      new Main().extendArraySize();
   }
}