java中怎么输出字母表中所有的大写字母

如下代码可打印大写字母表
public class English {

public 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("英文大写字母表： ");
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();
}

}