Condense String to character and count

CondenseString.java

public class CondenseString
{
  public static void main(String[] args)
  {
    StringBuilder sb = new StringBuilder();
    
    String test = "aaaabbbcccccccdeee";
    
    char ch = test.charAt(0);
    int count = 1;
    for (int i = 1; i <= test.length(); i++){
      
      if (i == test.length() || ch != test.charAt(i)){
        sb.append(ch);
        sb.append(count);
        if (i < test.length())
        	ch = test.charAt(i);
        count = 1;
        
        
      }
      else{
       count++;
      }
      
    }
      
    System.out.print(sb);
  }
}