blocks|key|1443726|text|代码:|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|1443727|public+class+JavaApplication+{
++public+static+void+main(String[]+args)+{
++++System.out.println("Working+Directory+=+"+%2B+System.getProperty("user.dir"));
++}
}|code-block|syntax|javascript|1443728|这将打印当前目录的绝对路径，您的应用程序是从该目录初始化的。|1443729|1443730|说明：|1443731|从documentation|1443732|java.io包使用当前用户目录解析相对路径名。当前目录表示为系统属性，即user.dir，并且是从中调用JVM的目录。|CODE|1443733|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.oracle.com/javase/7/docs/api/java/io/File.html^0|0|3|0|0|0|0|0|3|0|1|D|0|0|0|7|11|8|0^^$0|@$1|2|3|4|5|6|7|12|8|@$9|13|A|14|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|15|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|16|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|17|8|@]|D|@]|E|$]]|$1|N|3|O|5|6|7|18|8|@$9|19|A|1A|B|C]]|D|@]|E|$]]|$1|P|3|Q|5|6|7|1B|8|@]|D|@$9|1C|A|1D|1|1E]]|E|$]]|$1|R|3|S|5|6|7|1F|8|@$9|1G|A|1H|B|T]|$9|1I|A|1J|B|T]]|D|@]|E|$]]|$1|U|3|-4|5|6|7|1K|8|@]|D|@]|E|$]]]|V|$W|$5|X|Y|Z|E|$10|11]]]]

Code :
<pre><code>public class JavaApplication {
 public static void main(String[] args) {
 System.out.println(&quot;Working Directory = &quot; + System.getProperty(&quot;user.dir&quot;));
 }
}
</code></pre>
This will print the absolute path of the current directory from where your application was initialized.
<hr />
Explanation:
From the <a href="https://docs.oracle.com/javase/7/docs/api/java/io/File.html" rel="noreferrer">documentation</a>:
<code>java.io</code> package resolve relative pathnames using current user directory. The current directory is represented as system property, that is, <code>user.dir</code> and is the directory from where the JVM was invoked.

blocks|key|1639893|text|请参阅：Path+Operations+(The+Java™+Tutorials+>+Essential+Classes+>+Basic+I/O)|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1639894|使用java.nio.file.Path和java.nio.file.Paths，您可以执行以下操作来显示您认为的当前路径。这适用于7及更高版本，并使用NIO。|style|CODE|1639895|Path+currentRelativePath+=+Paths.get("");
String+s+=+currentRelativePath.toAbsolutePath().toString();
System.out.println("Current+absolute+path+is:+"+%2B+s);|code-block|syntax|javascript|1639896|这将输出以下内容：|1639897|Current+absolute+path+is:+/Users/george/NetBeansProjects/Tutorials|1639898|在我的例子中，这就是我运行类的地方。|1639899|以相对方式构建路径，通过不使用前导分隔符来指示您正在构建绝对路径，将使用此相对路径作为起点。|1639900|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.oracle.com/javase/tutorial/essential/io/pathOps.html^0|4|1X|0|0|2|I|L|J|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@$A|13|B|14|1|15]]|C|$]]|$1|D|3|E|5|6|7|16|8|@$A|17|B|18|F|G]|$A|19|B|1A|F|G]]|9|@]|C|$]]|$1|H|3|I|5|J|7|1B|8|@]|9|@]|C|$K|L]]|$1|M|3|N|5|6|7|1C|8|@]|9|@]|C|$]]|$1|O|3|P|5|J|7|1D|8|@]|9|@]|C|$K|L]]|$1|Q|3|R|5|6|7|1E|8|@]|9|@]|C|$]]|$1|S|3|T|5|6|7|1F|8|@]|9|@]|C|$]]|$1|U|3|-4|5|6|7|1G|8|@]|9|@]|C|$]]]|V|$W|$5|X|Y|Z|C|$10|11]]]]

See: <a href="https://docs.oracle.com/javase/tutorial/essential/io/pathOps.html" rel="noreferrer">Path Operations (The Java™ Tutorials &gt; Essential Classes &gt; Basic I/O)</a>.
Using <code>java.nio.file.Path</code> and <code>java.nio.file.Paths</code>, you can do the following to show what Java thinks is your current path. This for 7 and on, and uses NIO.
<pre><code>Path currentRelativePath = Paths.get(&quot;&quot;);
String s = currentRelativePath.toAbsolutePath().toString();
System.out.println(&quot;Current absolute path is: &quot; + s);
</code></pre>
This outputs:
<pre><code>Current absolute path is: /Users/george/NetBeansProjects/Tutorials
</code></pre>
that in my case is where I ran the class from.
Constructing paths in a relative way, by not using a leading separator to indicate you are constructing an absolute path, will use this relative path as the starting point.

blocks|key|1640071|text|以下代码适用于Java7及更高版本(有关文档，请参阅here+)。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1640072|import+java.nio.file.Paths;

Paths.get(".").toAbsolutePath().normalize().toString();|code-block|syntax|javascript|1640073|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.oracle.com/javase/7/docs/api/java/nio/file/Paths.html^0|Q|4|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

The following works on Java 7 and up (see <a href="https://docs.oracle.com/javase/7/docs/api/java/nio/file/Paths.html" rel="noreferrer">here</a> for documentation).

<pre><code>import java.nio.file.Paths;

Paths.get(".").toAbsolutePath().normalize().toString();
</code></pre>

blocks|key|1640697|text|这将为您提供当前工作目录的路径：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1640698|Path+path+=+FileSystems.getDefault().getPath(".");|code-block|syntax|javascript|1640699|这将为您提供工作目录中名为"Foo.txt“的文件的路径：|1640700|Path+path+=+FileSystems.getDefault().getPath("Foo.txt");|1640701|编辑:获取当前目录的绝对路径：|offset|length|style|BOLD|1640702|Path+path+=+FileSystems.getDefault().getPath(".").toAbsolutePath();|1640703|*更新*以获取当前工作目录：|1640704|Path+path+=+FileSystems.getDefault().getPath("").toAbsolutePath();|1640705|entityMap^0|0|0|0|0|0|3|0|0|0|4|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|10|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|12|8|@$M|13|N|14|O|P]]|9|@]|A|$]]|$1|Q|3|R|5|D|7|15|8|@]|9|@]|A|$E|F]]|$1|S|3|T|5|6|7|16|8|@$M|17|N|18|O|P]]|9|@]|A|$]]|$1|U|3|V|5|D|7|19|8|@]|9|@]|A|$E|F]]|$1|W|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]]|X|$]]

This will give you the path of your current working directory:

<pre><code>Path path = FileSystems.getDefault().getPath(".");
</code></pre>

And this will give you the path to a file called "Foo.txt" in the working directory:

<pre><code>Path path = FileSystems.getDefault().getPath("Foo.txt");
</code></pre>

Edit :
To obtain an absolute path of current directory:

<pre><code>Path path = FileSystems.getDefault().getPath(".").toAbsolutePath();
</code></pre>

* Update *
To get current working directory:

<pre><code>Path path = FileSystems.getDefault().getPath("").toAbsolutePath();
</code></pre>

blocks|key|3751918|text|Java+11和更高版本|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3751919|此解决方案比其他解决方案更好，并且更易于移植：|3751920|Path+cwd+=+Path.of("").toAbsolutePath();|code-block|syntax|javascript|3751921|甚至是|3751922|String+cwd+=+Path.of("").toAbsolutePath().toString();|3751923|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

<h1>Java 11 and newer</h1>
This solution is better than others and more portable:
<pre><code>Path cwd = Path.of(&quot;&quot;).toAbsolutePath();
</code></pre>
Or even
<pre><code>String cwd = Path.of(&quot;&quot;).toAbsolutePath().toString();
</code></pre>

blocks|key|5169274|text|这就是我的解决方案|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5169275|File+currentDir+=+new+File("");|code-block|syntax|javascript|5169276|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This is the solution for me

<pre><code>File currentDir = new File("");
</code></pre>

blocks|key|5169120|text|是什么让您认为c:\windows\system32不是您当前的目录？user.dir属性将显式设置为“用户的当前工作目录”。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|5169121|换句话说，除非您从命令行启动Java，否则c:\windows\system32可能就是您的CWD。也就是说，如果您双击以启动程序，则CWD不太可能是您双击的目录。|5169122|编辑:这似乎只适用于旧的窗口和/或Java版本。|5169123|entityMap|0|LINK|mutability|MUTABLE|url|http://download.oracle.com/javase/1.4.2/docs/api/java/lang/System.html#getProperties()^0|Z|8|Z|8|0|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@$9|S|A|T|B|C]]|D|@$9|U|A|V|1|W]]|E|$]]|$1|F|3|G|5|6|7|X|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|Y|8|@]|D|@]|E|$]]|$1|J|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|K|$L|$5|M|N|O|E|$P|Q]]]]

What makes you think that c:\windows\system32 is not your current directory? The <a href="http://download.oracle.com/javase/1.4.2/docs/api/java/lang/System.html#getProperties()" rel="noreferrer"><code>user.dir</code></a> property is explicitly to be "User's current working directory".

To put it another way, unless you start Java from the command line, c:\windows\system32 probably is your CWD. That is, if you are double-clicking to start your program, the CWD is unlikely to be the directory that you are double clicking from.

Edit: It appears that this is only true for old windows and/or Java versions.

blocks|key|1443832|text|使用CodeSource#getLocation()。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1443833|这在JAR文件中也工作得很好。您可以通过ProtectionDomain#getCodeSource()获取CodeSource，通过Class#getProtectionDomain()获取ProtectionDomain。|1443834|public+class+Test+{
++++public+static+void+main(String...+args)+throws+Exception+{
++++++++URL+location+=+Test.class.getProtectionDomain().getCodeSource().getLocation();
++++++++System.out.println(location.getFile());
++++}
}|code-block|syntax|javascript|1443835|entityMap|0|LINK|mutability|MUTABLE|url|http://docs.oracle.com/javase/8/docs/api/java/security/CodeSource.html#getLocation--|1|http://docs.oracle.com/javase/8/docs/api/java/security/ProtectionDomain.html#getCodeSource--|2|http://docs.oracle.com/javase/8/docs/api/java/lang/Class.html#getProtectionDomain--^0|2|O|2|O|0|0|K|W|1I|A|1V|R|2O|G|K|W|1|1V|R|2|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@$9|11|A|12|1|13]]|E|$]]|$1|F|3|G|5|6|7|14|8|@$9|15|A|16|B|C]|$9|17|A|18|B|C]|$9|19|A|1A|B|C]|$9|1B|A|1C|B|C]]|D|@$9|1D|A|1E|1|1F]|$9|1G|A|1H|1|1I]]|E|$]]|$1|H|3|I|5|J|7|1J|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|1K|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]|U|$5|P|Q|R|E|$S|V]]|W|$5|P|Q|R|E|$S|X]]]]

Use <a href="http://docs.oracle.com/javase/8/docs/api/java/security/CodeSource.html#getLocation--"><code>CodeSource#getLocation()</code></a>. 

This works fine in JAR files as well. You can obtain <code>CodeSource</code> by <a href="http://docs.oracle.com/javase/8/docs/api/java/security/ProtectionDomain.html#getCodeSource--"><code>ProtectionDomain#getCodeSource()</code></a> and the <code>ProtectionDomain</code> in turn can be obtained by <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Class.html#getProtectionDomain--"><code>Class#getProtectionDomain()</code></a>.

<pre><code>public class Test {
 public static void main(String... args) throws Exception {
 URL location = Test.class.getProtectionDomain().getCodeSource().getLocation();
 System.out.println(location.getFile());
 }
}
</code></pre>

blocks|key|1439371|text|this.getClass().getClassLoader().getResource("").getPath()|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1439372|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>this.getClass().getClassLoader().getResource("").getPath()
</code></pre>

blocks|key|3751562|text|通常，作为File对象：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3751563|File+getCwd()+{
++return+new+File("").getAbsoluteFile();
}|code-block|syntax|javascript|3751564|你可能想要像"D:/a/b/c“这样的全限定字符串：|3751565|getCwd().getAbsolutePath()|3751566|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

generally, as a File object:

<pre><code>File getCwd() {
 return new File("").getAbsoluteFile();
}
</code></pre>

you may want to have full qualified string like "D:/a/b/c" doing:

<pre><code>getCwd().getAbsolutePath()
</code></pre>

blocks|key|3751444|text|我使用的是Linux，这两种方法都得到了相同的结果：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3751445|@Test
public+void+aaa()
{
++++System.err.println(Paths.get("").toAbsolutePath().toString());

++++System.err.println(System.getProperty("user.dir"));
}|code-block|syntax|javascript|3751446|Paths.get("")+docs|offset|length|style|CODE|3751447|System.getProperty("user.dir")+docs|3751448|entityMap|0|LINK|mutability|MUTABLE|url|http://docs.oracle.com/javase/7/docs/api/java/nio/file/Paths.html#get%2528java.lang.String,%2520java.lang.String...%2529|1|http://docs.oracle.com/javase/tutorial/essential/environment/sysprop.html^0|0|0|0|D|0|I|0|0|0|U|0|Z|1|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|10|8|@$I|11|J|12|K|L]]|9|@$I|13|J|14|1|15]]|A|$]]|$1|M|3|N|5|6|7|16|8|@$I|17|J|18|K|L]]|9|@$I|19|J|1A|1|1B]]|A|$]]|$1|O|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]|W|$5|R|S|T|A|$U|X]]]]

I'm on Linux and get same result for both of these approaches:

<pre><code>@Test
public void aaa()
{
 System.err.println(Paths.get("").toAbsolutePath().toString());

 System.err.println(System.getProperty("user.dir"));
}
</code></pre>

<a href="http://docs.oracle.com/javase/7/docs/api/java/nio/file/Paths.html#get%28java.lang.String,%20java.lang.String...%29"><code>Paths.get("")</code> docs</a>

<a href="http://docs.oracle.com/javase/tutorial/essential/environment/sysprop.html"><code>System.getProperty("user.dir")</code> docs</a>

blocks|key|1639824|text|我希望你想要访问当前的目录，包括包，也就是说，如果你的Java程序在c:\myApp\com\foo\src\service\MyTest.java中，你想打印到c:\myApp\com\foo\src\service，那么你可以尝试下面的代码：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1639825|String+myCurrentDir+=+System.getProperty("user.dir")
++++++++++++%2B+File.separator
++++++++++++%2B+System.getProperty("sun.java.command")
++++++++++++++++++++.substring(0,+System.getProperty("sun.java.command").lastIndexOf("."))
++++++++++++++++++++.replace(".",+File.separator);
++++System.out.println(myCurrentDir);|code-block|syntax|javascript|1639826|注意：此代码仅在装有Oracle+JRE的Windows中进行测试。|BOLD|1639827|entityMap^0|Y|14|29|S|0|0|0|3|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]|$9|S|A|T|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|U|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|V|8|@$9|W|A|X|B|M]]|D|@]|E|$]]|$1|N|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|O|$]]

I hope you want to access the current directory including the package i.e. If your Java program is in <code>c:\myApp\com\foo\src\service\MyTest.java</code> and you want to print until <code>c:\myApp\com\foo\src\service</code> then you can try the following code:

<pre><code>String myCurrentDir = System.getProperty("user.dir")
 + File.separator
 + System.getProperty("sun.java.command")
 .substring(0, System.getProperty("sun.java.command").lastIndexOf("."))
 .replace(".", File.separator);
 System.out.println(myCurrentDir);
</code></pre>

Note: This code is only tested in Windows with Oracle JRE.

blocks|key|5169673|text|在Linux上，当您从终端运行+jar+文件时，无论jar文件位于何处，这两者都将返回相同的String：jar。当您启动jar文件时，这取决于您的终端使用的是哪个当前目录。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|CODE|entityRanges|data|5169674|Paths.get("").toAbsolutePath().toString();

System.getProperty("user.dir");|code-block|syntax|javascript|5169675|如果您使用main的Class将被称为MainClass，请尝试：|5169676|MainClass.class.getProtectionDomain().getCodeSource().getLocation().getFile();|5169677|这将返回一个包含jar文件的绝对路径的String。|5169678|entityMap^0|1|5|B|24|1A|6|0|0|0|X|5|4|A|5|J|9|0|0|0|Q|J|6|0^^$0|@$1|2|3|4|5|6|7|T|8|@$9|U|A|V|B|C]|$9|W|A|X|B|C]|$9|Y|A|Z|B|D]]|E|@]|F|$]]|$1|G|3|H|5|I|7|10|8|@]|E|@]|F|$J|K]]|$1|L|3|M|5|6|7|11|8|@$9|12|A|13|B|C]|$9|14|A|15|B|D]|$9|16|A|17|B|D]|$9|18|A|19|B|D]]|E|@]|F|$]]|$1|N|3|O|5|I|7|1A|8|@]|E|@]|F|$J|K]]|$1|P|3|Q|5|6|7|1B|8|@$9|1C|A|1D|B|C]|$9|1E|A|1F|B|D]]|E|@]|F|$]]|$1|R|3|-4|5|6|7|1G|8|@]|E|@]|F|$]]]|S|$]]

On Linux when you run a jar file from terminal, these both will return the same <code>String</code>: "/home/CurrentUser", no matter, where youre jar file is. It depends just on what current directory are you using with your terminal, when you start the jar file.

<pre><code>Paths.get("").toAbsolutePath().toString();

System.getProperty("user.dir");
</code></pre>

If your <code>Class</code> with <code>main</code> would be called <code>MainClass</code>, then try:

<pre><code>MainClass.class.getProtectionDomain().getCodeSource().getLocation().getFile();
</code></pre>

This will return a <code>String</code> with absolute path of the jar file.

blocks|key|3751771|text|使用WindowsSystem32会按预期返回目录，但在使用提升的权限(以管理员身份运行)启动应用程序时不会返回目录，在这种情况下会得到C：\+Windows+\+user.dir+32|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3751772|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Using Windows user.dir returns the directory as expected, but NOT when you start your application with elevated rights (run as admin), in that case you get C:\WINDOWS\system32

blocks|key|1640642|text|提到它只在中被选中，但我认为它在其他操作系统上工作得很好：)。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|1640643|1640644|我在同一目录中有2+.jar文件。我想从一个.jar文件中启动位于同一目录中的另一个.jar文件。|CODE|1640645|问题是，当您从cmd启动它时，当前目录是system32。|1640646|1640647|1640648|警告！|blockquote|1640649|1640650|1640651|1640652|下面的代码在我做过的所有测试中似乎都运行得很好，甚至在文件夹名为;][[;'57f2g34g87-8%2B9-09!2#@!$%25%5E%5E&()或()%25&$%25%5E@#的情况下也是如此。|unordered-list-item|1640653|我正在使用下面的ProcessBuilder，如下所示：|1640654|1640655|。。|1640656|//The+class+from+which+i+called+this+was+the+class+`Main`
String+path+=+getBasePathForClass(Main.class);
String+applicationPath=++new+File(path+%2B+"application.jar").getAbsolutePath();


System.out.println("Directory+Path+is+:+"%2BapplicationPath);

//Your+know+try+catch+here
//Mention+that+sometimes+it+doesn't+work+for+example+with+folder+`;][[;'57f2g34g87-8%2B9-09!2#@!$%25%5E%5E&()`+
ProcessBuilder+builder+=+new+ProcessBuilder("java",+"-jar",+applicationPath);
builder.redirectErrorStream(true);
Process+process+=+builder.start();

//...code|code-block|syntax|javascript|1640657|1640658|getBasePathForClass(Class<?>+classs)|1640659|++++/**
+++++*+Returns+the+absolute+path+of+the+current+directory+in+which+the+given
+++++*+class
+++++*+file+is.
+++++*+
+++++*+@param+classs
+++++*+@return+The+absolute+path+of+the+current+directory+in+which+the+class
+++++*+++++++++file+is.
+++++*+@author+GOXR3PLUS[StackOverFlow+user]+%2B+bachden+[StackOverFlow+user]
+++++*/
++++public+static+final+String+getBasePathForClass(Class<?>+classs)+{

++++++++//+Local+variables
++++++++File+file;
++++++++String+basePath+=+"";
++++++++boolean+failed+=+false;

++++++++//+Let's+give+a+first+try
++++++++try+{
++++++++++++file+=+new+File(classs.getProtectionDomain().getCodeSource().getLocation().toURI().getPath());

++++++++++++if+(file.isFile()+%7C%7C+file.getPath().endsWith(".jar")+%7C%7C+file.getPath().endsWith(".zip"))+{
++++++++++++++++basePath+=+file.getParent();
++++++++++++}+else+{
++++++++++++++++basePath+=+file.getPath();
++++++++++++}
++++++++}+catch+(URISyntaxException+ex)+{
++++++++++++failed+=+true;
++++++++++++Logger.getLogger(classs.getName()).log(Level.WARNING,
++++++++++++++++++++"Cannot+firgue+out+base+path+for+class+with+way+(1):+",+ex);
++++++++}

++++++++//+The+above+failed?
++++++++if+(failed)+{
++++++++++++try+{
++++++++++++++++file+=+new+File(classs.getClassLoader().getResource("").toURI().getPath());
++++++++++++++++basePath+=+file.getAbsolutePath();

++++++++++++++++//+the+below+is+for+testing+purposes...
++++++++++++++++//+starts+with+File.separator?
++++++++++++++++//+String+l+=+local.replaceFirst("["+%2B+File.separator+%2B
++++++++++++++++//+"/\\\\]",+"")
++++++++++++}+catch+(URISyntaxException+ex)+{
++++++++++++++++Logger.getLogger(classs.getName()).log(Level.WARNING,
++++++++++++++++++++++++"Cannot+firgue+out+base+path+for+class+with+way+(2):+",+ex);
++++++++++++}
++++++++}

++++++++//+fix+to+run+inside+eclipse
++++++++if+(basePath.endsWith(File.separator+%2B+"lib")+%7C%7C+basePath.endsWith(File.separator+%2B+"bin")
++++++++++++++++%7C%7C+basePath.endsWith("bin"+%2B+File.separator)+%7C%7C+basePath.endsWith("lib"+%2B+File.separator))+{
++++++++++++basePath+=+basePath.substring(0,+basePath.length()+-+4);
++++++++}
++++++++//+fix+to+run+inside+netbeans
++++++++if+(basePath.endsWith(File.separator+%2B+"build"+%2B+File.separator+%2B+"classes"))+{
++++++++++++basePath+=+basePath.substring(0,+basePath.length()+-+14);
++++++++}
++++++++//+end+fix
++++++++if+(!basePath.endsWith(File.separator))+{
++++++++++++basePath+=+basePath+%2B+File.separator;
++++++++}
++++++++return+basePath;
++++}|1640660|entityMap^0|0|V|0|0|8|1|A|4|M|4|16|4|0|7|3|K|8|0|0|0|0|0|0|0|W|Z|1W|9|0|8|E|0|0|0|0|0|0|10|0|0^^$0|@$1|2|3|4|5|6|7|1D|8|@$9|1E|A|1F|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|1G|8|@]|D|@]|E|$]]|$1|G|3|H|5|6|7|1H|8|@$9|1I|A|1J|B|C]|$9|1K|A|1L|B|I]|$9|1M|A|1N|B|I]|$9|1O|A|1P|B|I]]|D|@]|E|$]]|$1|J|3|K|5|6|7|1Q|8|@$9|1R|A|1S|B|I]|$9|1T|A|1U|B|I]]|D|@]|E|$]]|$1|L|3|-4|5|6|7|1V|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|1W|8|@]|D|@]|E|$]]|$1|N|3|O|5|P|7|1X|8|@]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|1Y|8|@]|D|@]|E|$]]|$1|R|3|-4|5|6|7|1Z|8|@]|D|@]|E|$]]|$1|S|3|-4|5|6|7|20|8|@]|D|@]|E|$]]|$1|T|3|U|5|V|7|21|8|@$9|22|A|23|B|I]|$9|24|A|25|B|I]]|D|@]|E|$]]|$1|W|3|X|5|V|7|26|8|@$9|27|A|28|B|I]]|D|@]|E|$]]|$1|Y|3|-4|5|6|7|29|8|@]|D|@]|E|$]]|$1|Z|3|10|5|6|7|2A|8|@]|D|@]|E|$]]|$1|11|3|12|5|13|7|2B|8|@]|D|@]|E|$14|15]]|$1|16|3|-4|5|6|7|2C|8|@]|D|@]|E|$]]|$1|17|3|18|5|6|7|2D|8|@$9|2E|A|2F|B|I]]|D|@]|E|$]]|$1|19|3|1A|5|13|7|2G|8|@]|D|@]|E|$14|15]]|$1|1B|3|-4|5|6|7|2H|8|@]|D|@]|E|$]]]|1C|$]]

Mention that it is checked only in <code>Windows</code> but i think it works perfect on other Operating Systems [<code>Linux,MacOs,Solaris</code>] :).

<hr>

I had 2 <code>.jar</code> files in the same directory . I wanted from the one <code>.jar</code> file to start the other <code>.jar</code> file which is in the same directory.

The problem is that when you start it from the <code>cmd</code> the current directory is <code>system32</code>.

<hr>

<blockquote>
 Warnings!
</blockquote>

<ul>
<li>The below seems to work pretty well in all the test i have done even
with folder name <code>;][[;'57f2g34g87-8+9-09!2#@!$%^^&amp;()</code> or <code>()%&amp;$%^@#</code>
it works well.</li>
<li>I am using the <code>ProcessBuilder</code> with the below as following:</li>
</ul>

..

<pre><code>//The class from which i called this was the class `Main`
String path = getBasePathForClass(Main.class);
String applicationPath= new File(path + "application.jar").getAbsolutePath();


System.out.println("Directory Path is : "+applicationPath);

//Your know try catch here
//Mention that sometimes it doesn't work for example with folder `;][[;'57f2g34g87-8+9-09!2#@!$%^^&amp;()` 
ProcessBuilder builder = new ProcessBuilder("java", "-jar", applicationPath);
builder.redirectErrorStream(true);
Process process = builder.start();

//...code
</code></pre>

<hr>

<code>getBasePathForClass(Class&lt;?&gt; classs)</code>:

<pre><code> /**
 * Returns the absolute path of the current directory in which the given
 * class
 * file is.
 * 
 * @param classs
 * @return The absolute path of the current directory in which the class
 * file is.
 * @author GOXR3PLUS[StackOverFlow user] + bachden [StackOverFlow user]
 */
 public static final String getBasePathForClass(Class&lt;?&gt; classs) {

 // Local variables
 File file;
 String basePath = "";
 boolean failed = false;

 // Let's give a first try
 try {
 file = new File(classs.getProtectionDomain().getCodeSource().getLocation().toURI().getPath());

 if (file.isFile() || file.getPath().endsWith(".jar") || file.getPath().endsWith(".zip")) {
 basePath = file.getParent();
 } else {
 basePath = file.getPath();
 }
 } catch (URISyntaxException ex) {
 failed = true;
 Logger.getLogger(classs.getName()).log(Level.WARNING,
 "Cannot firgue out base path for class with way (1): ", ex);
 }

 // The above failed?
 if (failed) {
 try {
 file = new File(classs.getClassLoader().getResource("").toURI().getPath());
 basePath = file.getAbsolutePath();

 // the below is for testing purposes...
 // starts with File.separator?
 // String l = local.replaceFirst("[" + File.separator +
 // "/\\\\]", "")
 } catch (URISyntaxException ex) {
 Logger.getLogger(classs.getName()).log(Level.WARNING,
 "Cannot firgue out base path for class with way (2): ", ex);
 }
 }

 // fix to run inside eclipse
 if (basePath.endsWith(File.separator + "lib") || basePath.endsWith(File.separator + "bin")
 || basePath.endsWith("bin" + File.separator) || basePath.endsWith("lib" + File.separator)) {
 basePath = basePath.substring(0, basePath.length() - 4);
 }
 // fix to run inside netbeans
 if (basePath.endsWith(File.separator + "build" + File.separator + "classes")) {
 basePath = basePath.substring(0, basePath.length() - 14);
 }
 // end fix
 if (!basePath.endsWith(File.separator)) {
 basePath = basePath + File.separator;
 }
 return basePath;
 }
</code></pre>

blocks|key|1443955|text|假设您正尝试在eclipse、netbean或独立于命令行中运行项目。我已经写了一个方法来修复它|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1443956|public+static+final+String+getBasePathForClass(Class<?>+clazz)+{
++++File+file;
++++try+{
++++++++String+basePath+=+null;
++++++++file+=+new+File(clazz.getProtectionDomain().getCodeSource().getLocation().toURI().getPath());
++++++++if+(file.isFile()+%7C%7C+file.getPath().endsWith(".jar")+%7C%7C+file.getPath().endsWith(".zip"))+{
++++++++++++basePath+=+file.getParent();
++++++++}+else+{
++++++++++++basePath+=+file.getPath();
++++++++}
++++++++//+fix+to+run+inside+eclipse
++++++++if+(basePath.endsWith(File.separator+%2B+"lib")+%7C%7C+basePath.endsWith(File.separator+%2B+"bin")
++++++++++++++++%7C%7C+basePath.endsWith("bin"+%2B+File.separator)+%7C%7C+basePath.endsWith("lib"+%2B+File.separator))+{
++++++++++++basePath+=+basePath.substring(0,+basePath.length()+-+4);
++++++++}
++++++++//+fix+to+run+inside+netbean
++++++++if+(basePath.endsWith(File.separator+%2B+"build"+%2B+File.separator+%2B+"classes"))+{
++++++++++++basePath+=+basePath.substring(0,+basePath.length()+-+14);
++++++++}
++++++++//+end+fix
++++++++if+(!basePath.endsWith(File.separator))+{
++++++++++++basePath+=+basePath+%2B+File.separator;
++++++++}
++++++++return+basePath;
++++}+catch+(URISyntaxException+e)+{
++++++++throw+new+RuntimeException("Cannot+firgue+out+base+path+for+class:+"+%2B+clazz.getName());
++++}
}|code-block|syntax|javascript|1443957|为了使用，只要你想获得读取文件的基本路径，你可以将你的锚类传递给上面的方法，结果可能就是你需要的东西:D|1443958|最好的|1443959|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

assume that you're trying to run your project inside eclipse, or netbean or stand alone from command line. I have write a method to fix it

<pre><code>public static final String getBasePathForClass(Class&lt;?&gt; clazz) {
 File file;
 try {
 String basePath = null;
 file = new File(clazz.getProtectionDomain().getCodeSource().getLocation().toURI().getPath());
 if (file.isFile() || file.getPath().endsWith(".jar") || file.getPath().endsWith(".zip")) {
 basePath = file.getParent();
 } else {
 basePath = file.getPath();
 }
 // fix to run inside eclipse
 if (basePath.endsWith(File.separator + "lib") || basePath.endsWith(File.separator + "bin")
 || basePath.endsWith("bin" + File.separator) || basePath.endsWith("lib" + File.separator)) {
 basePath = basePath.substring(0, basePath.length() - 4);
 }
 // fix to run inside netbean
 if (basePath.endsWith(File.separator + "build" + File.separator + "classes")) {
 basePath = basePath.substring(0, basePath.length() - 14);
 }
 // end fix
 if (!basePath.endsWith(File.separator)) {
 basePath = basePath + File.separator;
 }
 return basePath;
 } catch (URISyntaxException e) {
 throw new RuntimeException("Cannot firgue out base path for class: " + clazz.getName());
 }
}
</code></pre>

To use, everywhere you want to get base path to read file, you can pass your anchor class to above method, result may be the thing you need :D

Best,

blocks|key|5169071|text|在不同的Java实现中，当前工作目录的定义是不同的。对于Java+7之前的某些版本，没有一致的方法来获取工作目录。您可以通过使用-D启动Java文件并定义一个变量来保存信息来解决这个问题|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|5169072|就像这样|5169073|java+-D+com.mycompany.workingDir="%250"|code-block|syntax|javascript|5169074|这并不完全正确，但您已经明白了。然后System.getProperty("com.mycompany.workingDir")..。|5169075|entityMap^0|1S|2|0|0|0|I|1A|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|U|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|V|8|@$9|W|A|X|B|C]]|D|@]|E|$]]|$1|O|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|P|$]]

Current working directory is defined differently in different Java implementations. For certain version prior to Java 7 there was no consistent way to get the working directory. You could work around this by launching Java file with <code>-D</code> and defining a variable to hold the info

Something like

<pre><code>java -D com.mycompany.workingDir="%0"
</code></pre>

That's not quite right, but you get the idea. Then <code>System.getProperty("com.mycompany.workingDir")</code>...

blocks|key|5169922|text|这是我的银弹，当困惑的时刻冒出来的时候(称之为main中的第一件事)。例如，可能JVM被IDE滑到了不同的版本。此静态函数搜索当前进程pid，并在该PID上打开VisualVM。困惑就到此为止了，因为你想要所有的东西，你得到了它...|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5169923|++public+static+void+callJVisualVM()+{
++++System.out.println("USER:DIR!:"+%2B+System.getProperty("user.dir"));
++++//next+search+current+jdk/jre
++++String+jre_root+=+null;
++++String+start+=+"vir";
++++try+{
++++++++java.lang.management.RuntimeMXBean+runtime+=
++++++++++++++++java.lang.management.ManagementFactory.getRuntimeMXBean();
++++++++String+jvmName+=+runtime.getName();
++++++++System.out.println("JVM+Name+=+"+%2B+jvmName);
++++++++long+pid+=+Long.valueOf(jvmName.split("@")[0]);
++++++++System.out.println("JVM+PID++=+"+%2B+pid);
++++++++Runtime+thisRun+=+Runtime.getRuntime();
++++++++jre_root+=+System.getProperty("java.home");
++++++++System.out.println("jre_root:"+%2B+jre_root);
++++++++start+=+jre_root.concat("\\..\\bin\\jvisualvm.exe+"+%2B+"--openpid+"+%2B+pid);
++++++++thisRun.exec(start);
++++}+catch+(Exception+e)+{
++++++++System.getProperties().list(System.out);
++++++++e.printStackTrace();
++++}
}|code-block|syntax|javascript|5169924|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This is my silver bullet when ever the moment of confusion bubbles in.(Call it as first thing in main). Maybe for example JVM is slipped to be different version by IDE. This static function searches current process PID and opens VisualVM on that pid. Confusion stops right there because you want it all and you get it...

<pre><code> public static void callJVisualVM() {
 System.out.println("USER:DIR!:" + System.getProperty("user.dir"));
 //next search current jdk/jre
 String jre_root = null;
 String start = "vir";
 try {
 java.lang.management.RuntimeMXBean runtime =
 java.lang.management.ManagementFactory.getRuntimeMXBean();
 String jvmName = runtime.getName();
 System.out.println("JVM Name = " + jvmName);
 long pid = Long.valueOf(jvmName.split("@")[0]);
 System.out.println("JVM PID = " + pid);
 Runtime thisRun = Runtime.getRuntime();
 jre_root = System.getProperty("java.home");
 System.out.println("jre_root:" + jre_root);
 start = jre_root.concat("\\..\\bin\\jvisualvm.exe " + "--openpid " + pid);
 thisRun.exec(start);
 } catch (Exception e) {
 System.getProperties().list(System.out);
 e.printStackTrace();
 }
}
</code></pre>

blocks|key|5169974|text|这并不是我们所要求的，但这里有一个重要的注意事项:当在Windows机器上运行Java时，Oracle安装程序将一个"+java.exe“放入C:\Windows\system32中，这就是启动Java应用程序的程序(除非路径中前面有一个java.exe，并且Java应用程序是从命令行运行的)。这就是为什么文件(“.”)保持返回C:\+Windows+\system32，以及为什么运行来自macOS或*nix实现的示例总是返回来自Windows的不同结果。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5169975|不幸的是，就我在二十年的Java编码中所发现的，这个问题确实没有通用的正确答案，除非您希望使用JNI调用创建自己的本机启动器可执行文件，并在启动时从本机启动器代码中获取当前的工作目录。其他一切都将至少有一些细微差别，在某些情况下可能会崩溃。|5169976|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

This isn't exactly what's asked, but here's an important note: When running Java on a Windows machine, the Oracle installer puts a &quot;java.exe&quot; into C:\Windows\system32, and this is what acts as the launcher for the Java application (UNLESS there's a java.exe earlier in the PATH, and the Java app is run from the command-line). This is why File(&quot;.&quot;) keeps returning C:\Windows\system32, and why running examples from macOS or *nix implementations keep coming back with different results from Windows.
Unfortunately, there's really no universally correct answer to this one, as far as I have found in twenty years of Java coding unless you want to create your own native launcher executable using JNI Invocation, and get the current working directory from the native launcher code when it's launched. Everything else is going to have at least some nuance that could break under certain situations.

blocks|key|5170008|text|试着这样做，我知道我的答案来晚了，但这件显而易见的事情发生在java8中，这是一个新版本，提出这个问题的地方，但是…|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5170009|代码|5170010|import+java.io.File;

public+class+Find_this_dir+{

++++public+static+void+main(String[]+args)+{

//some+sort+of+a+bug+in+java+path+is+correct+but+file+dose+not+exist
++++++++File+this_dir+=+new+File("");

//but+these+both+commands+work+too+to+get+current+dir++++++++
//++++++File+this_dir_2+=+new+File(this_dir.getAbsolutePath());
++++++++File+this_dir_2+=+new+File(new+File("").getAbsolutePath());

++++++++System.out.println("new+File("+%2B+"\"\""+%2B+")");
++++++++System.out.println(this_dir.getAbsolutePath());
++++++++System.out.println(this_dir.exists());
++++++++System.out.println("");
++++++++System.out.println("new+File("+%2B+"new+File("+%2B+"\"\""+%2B+").getAbsolutePath()"+%2B+")");
++++++++System.out.println(this_dir_2.getAbsolutePath());
++++++++System.out.println(this_dir_2.exists());
++++}
}|code-block|syntax|javascript|5170011|这将工作，并显示您的当前路径，但我现在不明白为什么java找不到new+File("");中的当前目录，而且我正在使用Java8编译器…|offset|length|style|BOLD|CODE|5170012|这个运行得很好，我甚至测试了一下new+File(new+File("").getAbsolutePath());|5170013|现在，您在File对象中有了当前目录，因此(示例文件对象是f)，|5170014|f.getAbsolutePath()会给你一个字符串可变类型的路径...|5170015|在非C驱动器的另一个目录中测试工作正常|5170016|entityMap^0|0|0|0|W|D|W|D|0|G|15|0|0|0|J|0|0^^$0|@$1|2|3|4|5|6|7|Z|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|10|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|11|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|12|8|@$K|13|L|14|M|N]|$K|15|L|16|M|O]]|9|@]|A|$]]|$1|P|3|Q|5|6|7|17|8|@$K|18|L|19|M|O]]|9|@]|A|$]]|$1|R|3|S|5|6|7|1A|8|@]|9|@]|A|$]]|$1|T|3|U|5|6|7|1B|8|@$K|1C|L|1D|M|O]]|9|@]|A|$]]|$1|V|3|W|5|6|7|1E|8|@]|9|@]|A|$]]|$1|X|3|-4|5|6|7|1F|8|@]|9|@]|A|$]]]|Y|$]]

Try something like this I know I am late for the answer but this obvious thing happened in java8 a new version from where this question is asked but..
The code
<pre><code>import java.io.File;

public class Find_this_dir {

 public static void main(String[] args) {

//some sort of a bug in java path is correct but file dose not exist
 File this_dir = new File(&quot;&quot;);

//but these both commands work too to get current dir 
// File this_dir_2 = new File(this_dir.getAbsolutePath());
 File this_dir_2 = new File(new File(&quot;&quot;).getAbsolutePath());

 System.out.println(&quot;new File(&quot; + &quot;\&quot;\&quot;&quot; + &quot;)&quot;);
 System.out.println(this_dir.getAbsolutePath());
 System.out.println(this_dir.exists());
 System.out.println(&quot;&quot;);
 System.out.println(&quot;new File(&quot; + &quot;new File(&quot; + &quot;\&quot;\&quot;&quot; + &quot;).getAbsolutePath()&quot; + &quot;)&quot;);
 System.out.println(this_dir_2.getAbsolutePath());
 System.out.println(this_dir_2.exists());
 }
}
</code></pre>
This will work and show you the current path but I don't now why java fails to find current dir in <code>new File(&quot;&quot;);</code> besides I am using Java8 compiler...
This works just fine I even tested it <code>new File(new File(&quot;&quot;).getAbsolutePath());</code>
Now you have current directory in a File object so (Example file object is f then),
<code> f.getAbsolutePath()</code> will give you the path in a String varaible type...
Tested in another directory that is not drive C works fine

blocks|key|1444164|text|对于Java+11，您还可以使用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1444165|var+path+=+Path.of(".").toRealPath();|code-block|syntax|javascript|1444166|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

For Java 11 you could also use:
<pre><code>var path = Path.of(&quot;.&quot;).toRealPath();
</code></pre>

blocks|key|5170043|text|我最喜欢的方法是从附加到当前运行的进程的系统环境变量中获取它。在这种情况下，您的应用程序由JVM管理。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5170044|String+currentDir+=+System.getenv("PWD");
/*
+/home/$User/Documents/java
*/|code-block|syntax|javascript|5170045|查看其他可能有用的环境变量，如home+dir、os+version+........|5170046|//Home+directory
String+HomeDir+=+System.getEnv("HOME");


//Outputs+for+unix
/home/$USER

//Device+user
String+user+=+System.getEnv("USERNAME");


//Outputs+for+unix
$USER|5170047|这种方法的美妙之处在于，将为所有类型的操作系统平台解决所有路径|5170048|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

My favorite method is to get it from the system environment variables attached to the current running process. In this case, your application is being managed by the JVM.
<pre><code>String currentDir = System.getenv(&quot;PWD&quot;);
/*
 /home/$User/Documents/java
*/
</code></pre>
To view other environment variables that you might find useful like, home dir, os version ........
<pre><code>//Home directory
String HomeDir = System.getEnv(&quot;HOME&quot;);


//Outputs for unix
/home/$USER

//Device user
String user = System.getEnv(&quot;USERNAME&quot;);


//Outputs for unix
$USER
</code></pre>
The beautiful thing with this approach is that all paths will be resolved for all types of OS platform

blocks|key|3752100|text|您可以使用new+File("./")。这样，isDirectory()将返回true+(至少在Windows平台上)。另一方面，new+File("")+isDirectory()返回false。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3752101|entityMap^0|5|E|N|D|1T|Q|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|O|8|@]|D|@]|E|$]]]|G|$]]

You might use <code>new File(&quot;./&quot;)</code>. This way <code>isDirectory()</code> returns true (at least on Windows platform). On the other hand <code>new File(&quot;&quot;) isDirectory()</code> returns false.

blocks|key|5169558|text|这里发布的答案对我来说都不起作用。以下是起作用的方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5169559|java.nio.file.Paths.get(
++getClass().getProtectionDomain().getCodeSource().getLocation().toURI()
);|code-block|syntax|javascript|5169560|编辑:我的代码中的最终版本：|5169561|URL+myURL+=+getClass().getProtectionDomain().getCodeSource().getLocation();
java.net.URI+myURI+=+null;
try+{
++++myURI+=+myURL.toURI();
}+catch+(URISyntaxException+e1)+
{}
return+java.nio.file.Paths.get(myURI).toFile().toString()|5169562|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

None of the answers posted here worked for me. Here is what did work:

<pre><code>java.nio.file.Paths.get(
 getClass().getProtectionDomain().getCodeSource().getLocation().toURI()
);
</code></pre>

Edit: The final version in my code:

<pre><code>URL myURL = getClass().getProtectionDomain().getCodeSource().getLocation();
java.net.URI myURI = null;
try {
 myURI = myURL.toURI();
} catch (URISyntaxException e1) 
{}
return java.nio.file.Paths.get(myURI).toFile().toString()
</code></pre>

blocks|key|5169427|text|System.getProperty("java.class.path")|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|5169428|entityMap^0|0|11|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

<code>System.getProperty("java.class.path")</code>

blocks|key|1443808|text|这是当前目录名称|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1443809|String+path="/home/prasad/Desktop/folderName";
File+folder+=+new+File(path);
String+folderName=folder.getAbsoluteFile().getName();|code-block|syntax|javascript|1443810|这是当前目录路径|1443811|String+path=folder.getPath();|1443812|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

this is current directory name 

<pre><code>String path="/home/prasad/Desktop/folderName";
File folder = new File(path);
String folderName=folder.getAbsoluteFile().getName();
</code></pre>

this is current directory path

<pre><code>String path=folder.getPath();
</code></pre>

I want to access my current working directory using Java.
My code:
<pre><code> String currentPath = new java.io.File(&quot;.&quot;).getCanonicalPath();
 System.out.println(&quot;Current dir:&quot; + currentPath);

 String currentDir = System.getProperty(&quot;user.dir&quot;);
 System.out.println(&quot;Current dir using System:&quot; + currentDir);
</code></pre>
Output:
<pre><code>Current dir: C:\WINDOWS\system32
Current dir using System: C:\WINDOWS\system32
</code></pre>
My output is not correct because the C drive is not my current directory.
How to get the current directory?

How to get the current working directory in Java?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我想使用Java访问我当前的工作目录。我的代码： String currentPath = new java.io.File(".").getCanonicalPath(); System.out.println("Current dir:" + currentPath); String currentDir = System.getProperty("user.dir"); System.out

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