charAt()

char charAt(int index)
Returns the char value in this sequence at the specified index.

public class Main {
  public static void main(String[] argv) {
    StringBuilder sb = new StringBuilder();
    sb.append("java2s.com");

    char ch = sb.charAt(0);
    
    System.out.println(ch);

  }
}

The output: 


j
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    Essential Classes  

StringBuilder:
  1. StringBuilder
  2. StringBuilder Constructor
  3. append(char c)
  4. StringBuilder capacity()
  5. charAt()
  6. delete(int start, int end)
  7. deleteCharAt
  8. StringBuilder length()
  9. StringBuilder reverse()
  10. setCharAt
  11. Sub string from StringBuilder
  12. toString():Convert StringBuilder to String