java输出获取英文字母

public static void printEnglish()  {  int firstEnglish, lastEnglish;  char firstE = 'A', lastE = 'Z';      //获取首字母与末字母的值   firstEnglish = (int)firstE;  lastEnglish = (int)lastE;  System.out.println("英文字母表： ");  for(int i = firstEnglish; i <= lastEnglish; ++i)  {  char uppercase, lowercase;   uppercase = (char)i;  lowercase = (char)(i + 32);  System.out.print("" + uppercase + lowercase);  }  System.out.println();  }