*以185****3547显示demo

　　　　 String phone="18678473547";
	//String phones = phone.substring(0,phone.length()-(phone.substring(3)).length())+"****"+phone.substring(7);
　　　　　　String phones = phone.substring(0,3)+"****"+phone.substring(7);
	System.out.println(phones);//结果：185****3547