code: public class Pangram {
      public static boolean isPangram(String test){
          for (char a = 'A'; a <= 'Z'; a++)
              if ((test.indexOf(a) < 0) && (test.indexOf((char)(a + 32)) < 0))
                  return false;
          return true;
      }
  
      public static void main(String[] args){
          System.out.println(isPangram("the quick brown fox jumps over the lazy dog"));//true
          System.out.println(isPangram("the quick brown fox jumped over the lazy dog"));//false, no s
          System.out.println(isPangram("ABCDEFGHIJKLMNOPQRSTUVWXYZ"));//true
          System.out.println(isPangram("ABCDEFGHIJKLMNOPQSTUVWXYZ"));//false, no r
          System.out.println(isPangram("ABCDEFGHIJKL.NOPQRSTUVWXYZ"));//false, no m
          System.out.println(isPangram("ABC.D.E.FGHI*J/KL-M+NO*PQ R\nSTUVWXYZ"));//true
          System.out.println(isPangram(""));//false
      }
  }
  