title: How do I check to see if a word contains a letter or group of letters?
body: <p>I am working on a program for my CompSci I class and I'm entirely stuck. The assignment is to use if statements to check whether a particular string contains a letter or group of letters. I have a class created for this and I've laid out everything, but I just don't know how to begin searching for the characters. I'm really new to Strings and Return methods. I looked for similar questions already, but none really helped with what I was looking for. I would appreciate some help.</p>
  
  <p>My code so far:
  Main:</p>
  
  <pre><code>import static java.lang.System.*;
  
  public class Lab04e
  {
  public static void main(String[] args)
  {
  
  }
  }
  </code></pre>
  
  <p>StringChecker:</p>
  
  <pre><code>import static java.lang.System.*;
  public class StringChecker {
  
  private String check;
  
      public void StringChecker()
      {
          check = "";
      }
  
      public void StringChecker(String s) //constructor
      {
          check = s;
      }
  
      public void setString(String s) //set string
      {
          check = s;
      }
  
      public boolean letterExists(char a)
      {
          return false;
      }
  
      public boolean findSubString(String s)
      {
          return false;
      }
  
      public String toString()
      {
          return check +"\n\n";
      }
  }
  </code></pre>