标识符

public class Demo01 { public static void main(String[] args) { // 标识符大大小写敏感 String Man = “老师hao”; String man = “老师好”; System.out.println(Man) ; System.out.println(man) ;

String Aello = "quanzhi"; String aello = "quanzhi"; String $ello = "quanzhi"; String _ = "quanzhi"; System.out.println(Aello) ; System.out.println(aello) ; System.out.println($ello) ; System.out.println(_) ; }

}