Java vs C++ (7)导入

用法 import VS include

Java   import java.util.regex.Pattern;

package com.slim;

（1）假设少了; 会warning: 

C++   #include <iostream>

if add ; after >, warning: extra tokens at end of #include directive [enabled by default]

（2）JAVA存在包的概念，在相同包内不需要import.