Java 获取当前系统的操作系统类型
版权声明:本文为博主原创文章,遵循CC 4.0 BY-SA版权协议,转载请附上原文出处链接和本声明。
Java后台获取操作系统类型 (完整工具类)
public class OSinfo {
<span class="token keyword">private</span> <span class="token keyword">static</span> String OS <span class="token operator">=</span> System<span class="token punctuation">.</span><span class="token function">getProperty</span><span class="token punctuation">(</span><span class="token string">"os.name"</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">toLowerCase</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">private</span> <span class="token keyword">static</span> OSinfo _instance <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">OSinfo</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">private</span> EPlatform platform<span class="token punctuation">;</span>
<span class="token keyword">private</span> <span class="token function">OSinfo</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span><span class="token punctuation">}</span>
<span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">boolean</span> <span class="token function">isLinux</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
<span class="token keyword">return</span> OS<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">"linux"</span><span class="token punctuation">)</span><span class="token operator">>=</span><span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">boolean</span> <span class="token function">isMacOS</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
<span class="token keyword">return</span> OS<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">"mac"</span><span class="token punctuation">)</span><span class="token operator">>=</span><span class="token number">0</span><span class="token operator">&&</span>OS<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">"os"</span><span class="token punctuation">)</span><span class="token operator">></span><span class="token number">0</span><span class="token operator">&&</span>OS<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">"x"</span><span class="token punctuation">)</span><span class="token operator"><</span><span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">boolean</span> <span class="token function">isMacOSX</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
<span class="token keyword">return</span> OS<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">"mac"</span><span class="token punctuation">)</span><span class="token operator">>=</span><span class="token number">0</span><span class="token operator">&&</span>OS<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">"os"</span><span class="token punctuation">)</span><span class="token operator">></span><span class="token number">0</span><span class="token operator">&&</span>OS<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">"x"</span><span class="token punctuation">)</span><span class="token operator">></span><span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">boolean</span> <span class="token function">isWindows</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
<span class="token keyword">return</span> OS<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">"windows"</span><span class="token punctuation">)</span><span class="token operator">>=</span><span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">boolean</span> <span class="token function">isOS2</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
<span class="token keyword">return</span> OS<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">"os/2"</span><span class="token punctuation">)</span><span class="token operator">>=</span><span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">boolean</span> <span class="token function">isSolaris</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
<span class="token keyword">return</span> OS<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">"solaris"</span><span class="token punctuation">)</span><span class="token operator">>=</span><span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">boolean</span> <span class="token function">isSunOS</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
<span class="token keyword">return</span> OS<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">"sunos"</span><span class="token punctuation">)</span><span class="token operator">>=</span><span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">boolean</span> <span class="token function">isMPEiX</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
<span class="token keyword">return</span> OS<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">"mpe/ix"</span><span class="token punctuation">)</span><span class="token operator">>=</span><span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">boolean</span> <span class="token function">isHPUX</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
<span class="token keyword">return</span> OS<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">"hp-ux"</span><span class="token punctuation">)</span><span class="token operator">>=</span><span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">boolean</span> <span class="token function">isAix</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
<span class="token keyword">return</span> OS<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">"aix"</span><span class="token punctuation">)</span><span class="token operator">>=</span><span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">boolean</span> <span class="token function">isOS390</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
<span class="token keyword">return</span> OS<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">"os/390"</span><span class="token punctuation">)</span><span class="token operator">>=</span><span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">boolean</span> <span class="token function">isFreeBSD</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
<span class="token keyword">return</span> OS<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">"freebsd"</span><span class="token punctuation">)</span><span class="token operator">>=</span><span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">boolean</span> <span class="token function">isIrix</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
<span class="token keyword">return</span> OS<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">"irix"</span><span class="token punctuation">)</span><span class="token operator">>=</span><span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">boolean</span> <span class="token function">isDigitalUnix</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
<span class="token keyword">return</span> OS<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">"digital"</span><span class="token punctuation">)</span><span class="token operator">>=</span><span class="token number">0</span><span class="token operator">&&</span>OS<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">"unix"</span><span class="token punctuation">)</span><span class="token operator">></span><span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">boolean</span> <span class="token function">isNetWare</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
<span class="token keyword">return</span> OS<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">"netware"</span><span class="token punctuation">)</span><span class="token operator">>=</span><span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">boolean</span> <span class="token function">isOSF1</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
<span class="token keyword">return</span> OS<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">"osf1"</span><span class="token punctuation">)</span><span class="token operator">>=</span><span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">boolean</span> <span class="token function">isOpenVMS</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
<span class="token keyword">return</span> OS<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">"openvms"</span><span class="token punctuation">)</span><span class="token operator">>=</span><span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token comment">/**
* 获取操作系统名字
* @return 操作系统名
*/</span>
<span class="token keyword">public</span> <span class="token keyword">static</span> EPlatform <span class="token function">getOSname</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
<span class="token keyword">if</span><span class="token punctuation">(</span><span class="token function">isAix</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
_instance<span class="token punctuation">.</span>platform <span class="token operator">=</span> EPlatform<span class="token punctuation">.</span>AIX<span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isDigitalUnix</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
_instance<span class="token punctuation">.</span>platform <span class="token operator">=</span> EPlatform<span class="token punctuation">.</span>Digital_Unix<span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isFreeBSD</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
_instance<span class="token punctuation">.</span>platform <span class="token operator">=</span> EPlatform<span class="token punctuation">.</span>FreeBSD<span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isHPUX</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
_instance<span class="token punctuation">.</span>platform <span class="token operator">=</span> EPlatform<span class="token punctuation">.</span>HP_UX<span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isIrix</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
_instance<span class="token punctuation">.</span>platform <span class="token operator">=</span> EPlatform<span class="token punctuation">.</span>Irix<span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isLinux</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
_instance<span class="token punctuation">.</span>platform <span class="token operator">=</span> EPlatform<span class="token punctuation">.</span>Linux<span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isMacOS</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
_instance<span class="token punctuation">.</span>platform <span class="token operator">=</span> EPlatform<span class="token punctuation">.</span>Mac_OS<span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isMacOSX</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
_instance<span class="token punctuation">.</span>platform <span class="token operator">=</span> EPlatform<span class="token punctuation">.</span>Mac_OS_X<span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isMPEiX</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
_instance<span class="token punctuation">.</span>platform <span class="token operator">=</span> EPlatform<span class="token punctuation">.</span>MPEiX<span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isNetWare</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
_instance<span class="token punctuation">.</span>platform <span class="token operator">=</span> EPlatform<span class="token punctuation">.</span>NetWare_411<span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isOpenVMS</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
_instance<span class="token punctuation">.</span>platform <span class="token operator">=</span> EPlatform<span class="token punctuation">.</span>OpenVMS<span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isOS2</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
_instance<span class="token punctuation">.</span>platform <span class="token operator">=</span> EPlatform<span class="token punctuation">.</span>OS2<span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isOS390</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
_instance<span class="token punctuation">.</span>platform <span class="token operator">=</span> EPlatform<span class="token punctuation">.</span>OS390<span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isOSF1</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
_instance<span class="token punctuation">.</span>platform <span class="token operator">=</span> EPlatform<span class="token punctuation">.</span>OSF1<span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isSolaris</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
_instance<span class="token punctuation">.</span>platform <span class="token operator">=</span> EPlatform<span class="token punctuation">.</span>Solaris<span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isSunOS</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
_instance<span class="token punctuation">.</span>platform <span class="token operator">=</span> EPlatform<span class="token punctuation">.</span>SunOS<span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isWindows</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
_instance<span class="token punctuation">.</span>platform <span class="token operator">=</span> EPlatform<span class="token punctuation">.</span>Windows<span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token keyword">else</span><span class="token punctuation">{</span>
_instance<span class="token punctuation">.</span>platform <span class="token operator">=</span> EPlatform<span class="token punctuation">.</span>Others<span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">return</span> _instance<span class="token punctuation">.</span>platform<span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token comment">/**
* @param args
*/</span>
<span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span>String<span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>OSinfo<span class="token punctuation">.</span><span class="token function">getOSname</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>OSinfo<span class="token punctuation">.</span><span class="token function">isWindows</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
}
</div>
<link href="https://csdnimg.cn/release/phoenix/mdeditor/markdown_views-e44c3c0e64.css" rel="stylesheet">
原文地址:https://blog.csdn.net/fangchao2011/article/details/88785637
Java 获取当前系统的操作系统类型的更多相关文章
- Java 获取当前系统时间方法比较
转载: http://blog.csdn.net/zzjjiandan/article/details/8372617 一. 获取当前系统时间和日期并格式化输出: import java.util.D ...
- Java获取虚拟机内存和操作系统内存及其线程
为什么要获取虚拟机内存和操作系统内存呢? 虚拟机内存,这里主要指JVM.为了防止有的时候因为JVM内存问题导致服务器宕机,所以有必要监控JVM的内存.当达到一定值时,通过邮件及时通知,防止线上宕机造成 ...
- Java 获取当前系统的时间
获取当前系统的时间,每隔一秒,打印一次. import java.util.Date; public class TestDate { public static void main(String[] ...
- Java获取Linux系统cpu使用率
原文:http://www.open-open.com/code/view/1426152165201 import java.io.BufferedReader; import java.io.Fi ...
- java 获取当前系统系时间
//SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//设置日期格式 SimpleDateFo ...
- java获取当前系统毫秒,纳秒
//获取当前系统毫秒 System.out.println(System.currentTimeMillis()); //获取当前系统纳秒 System.out.println(System.nano ...
- java获取数据库的列名,类型等信息
当你使用和学习JDK的时候,可以查看并学习它所提供给你的两个ResultSetMetaData 和DataBaseMetaData类的源码并很好的了解它们的实现原理和思路,JDBC中提供有两种源数据, ...
- VC++ 获取windows系统的版本类型
vc中获取windows版本信息,一般是调用GetVersionEx 这个API函数来获取的,这个API需要OSVERSIONINFOEX 这个结构体作为参数,OSVERSIONINFOEX 的对应的 ...
- java获取数据库的列名、类型等信息
当你使用和学习JDK的时候,可以查看并学习它所提供给你的两个ResultSetMetaData 和DataBaseMetaData类的源码并很好的了解它们的实现原理和思路,JDBC中提供有两种源数据, ...
随机推荐
- 使用 C++ 编写的基础 Windows 服务 (CppWindowsService)
最近项目中涉及到使用C++写一个后台服务程序,找了很多资料,还是使用Google搜索找到了比较详细点的资料,就是从微软官方MSDN的例子,如下: 使用 C++ 编写的基础 Windows 服务 (Cp ...
- JavaScript中Function函数与Object对象的关系
函数对象和其他内部对象的关系 除了函数对象,还有很多内部对象,比如:Object.Array.Date.RegExp.Math.Error.这些名称实际上表示一个 类型,可以通过new操作符返回一个对 ...
- hduoj-1301 Jungle Roads(最小生成树-克鲁斯卡尔和普里姆求解)
普里姆求解: #include<cstdio> #include<cmath> #include<cstring> #include<iostream> ...
- PHP简单导出Excel表格
<?php header('Content-Type: application/vnd.ms-excel'); header('Content-Disposition: attachment; ...
- Notepad++中直接运行python
点击进入幕布视图浏览 https://mubu.com/doc/a8VGCUfqqw 一.使用Notepad++编辑python文件,并直接运行 1.用notepad++打开python文件.或者新建 ...
- CTU OPEN 2017 Punching Power /// 最大独立集
题目大意: 给定n 给定n个机器的位置 要求任意两个机器间的距离至少为1.3米 求最多能选择多少个机器 至少为1.3米 说明若是位于上下左右一步的得放就不行 将机器编号 将不能同时存在的机器连边 此时 ...
- 备份一下alias喽
# 每次grep都显示出行号示出行号 alias grep="grep -n" # grep反向选择并显示行号显示行号 alias vgrep="grep -n -v&q ...
- BUUCTF MISC ZIP
这道题有点烦,拿出来单独写先贴两张图,一会用 首先这题给了68个压缩包,每个压缩包里只有4bytes大小,于是可以想到是crc爆破,自己写的脚本总是被killed,犯懒找了个脚本 import zip ...
- #define和const的区别(转)
这个区别用从几个角度来说: 角度1:就定义常量说的话:const 定义的常数是变量 也带类型, #define 定义的只是个常数 不带类型. 角度2:就起作用的阶段而言:define是在编译的预处理阶 ...
- 【LeetCode 16】最接近的三数之和
题目链接 [题解] 上一道题那个算法求三个数的和为0的时候,其实就是一个不断在逼近本题中x=0的情况. 那么就套用上面那道题的做法. 在逼近的时候,取个差值的最小值就好了. [代码] class So ...