Binary search an array using Comparable in Java

Problem:

Write a java program that uses binary search to search array
using Comparable in Java

Output:

Not applicable.

Solution:

public class Linearsearch
{
  public static void main(String[] args)
  {
    String[] stuff={"a","b","c"};
    System.out.println(linearsearch(stuff,"b", 0));
    System.out.println(binarysearch(stuff,"a", 0, stuff.length-1));
  }
  public static int linearsearch(Comparable[] items, Comparable target, int posfirst)
  {
    if(posfirst==items.length)
      return -1;
    else if(items[posfirst].compareTo(target)==0)
    {
      return posfirst;
    }
    else
      return linearsearch(items, target,  (posfirst+1));
  }