delDel

Problem:

Given a string, if the string "del" appears starting at index 1, return a string where that "del" has been deleted. Otherwise, return the string unchanged.

Test Cases:

delDel("adelbc") → "abc"
delDel("adelHello") → "aHello"
delDel("adedbc") → "adedbc"

Solution: 

public String delDel(String str) {
  if(str.length()>=4)
  {
  if(str.substring(1,4).equals("del"))
  {
    return str.substring(0,1)+str.substring(4);
  }
  }
  return str;
}