blocks|key|510047|text|File+f+=+new+File("C:/aaa/bbb/ccc/ddd/test.java");
System.out.println(f.getParentFile().getName())|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|510048|f.getParentFile()可以为空，所以您应该检查它。|unstyled|offset|length|style|CODE|510049|entityMap^0|0|0|H|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|N|8|@$G|O|H|P|I|J]]|9|@]|A|$]]|$1|K|3|-4|5|F|7|Q|8|@]|9|@]|A|$]]]|L|$]]

<pre><code>File f = new File("C:/aaa/bbb/ccc/ddd/test.java");
System.out.println(f.getParentFile().getName())
</code></pre>

<code>f.getParentFile()</code> can be null, so you should check it.

blocks|key|726439|text|在下面使用，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|726440|File+file+=+new+File("file/path");
String+parentPath+=+file.getAbsoluteFile().getParent();|code-block|syntax|javascript|726441|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|$]]

Use below,

<pre><code>File file = new File("file/path");
String parentPath = file.getAbsoluteFile().getParent();
</code></pre>

blocks|key|510071|text|如果你只有字符串路径，并且不想创建新的File对象，你可以使用如下命令：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|510072|public+static+String+getParentDirPath(String+fileOrDirPath)+{
++++boolean+endsWithSlash+=+fileOrDirPath.endsWith(File.separator);
++++return+fileOrDirPath.substring(0,+fileOrDirPath.lastIndexOf(File.separatorChar,+
++++++++++++endsWithSlash+?+fileOrDirPath.length()+-+2+:+fileOrDirPath.length()+-+1));
}|code-block|syntax|javascript|510073|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|$]]

If you have just String path and don't want to create new File object you can use something like:

<pre><code>public static String getParentDirPath(String fileOrDirPath) {
 boolean endsWithSlash = fileOrDirPath.endsWith(File.separator);
 return fileOrDirPath.substring(0, fileOrDirPath.lastIndexOf(File.separatorChar, 
 endsWithSlash ? fileOrDirPath.length() - 2 : fileOrDirPath.length() - 1));
}
</code></pre>

blocks|key|510103|text|File+file+=+new+File("C:/aaa/bbb/ccc/ddd/test.java");
File+curentPath+=+new+File(file.getParent());
//get+current+path+"C:/aaa/bbb/ccc/ddd/"
String+currentFolder=+currentPath.getName().toString();
//get+name+of+file+to+string+"ddd"|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|510104|如果您需要通过另一个路径附加文件夹"ddd“，请使用；|unstyled|510105|String+currentFolder=+"/"+%2B+currentPath.getName().toString();|510106|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|L|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|I|3|-4|5|F|7|N|8|@]|9|@]|A|$]]]|J|$]]

<pre><code>File file = new File("C:/aaa/bbb/ccc/ddd/test.java");
File curentPath = new File(file.getParent());
//get current path "C:/aaa/bbb/ccc/ddd/"
String currentFolder= currentPath.getName().toString();
//get name of file to string "ddd"
</code></pre>

if you need to append folder "ddd" by another path use;

<pre><code>String currentFolder= "/" + currentPath.getName().toString();
</code></pre>

blocks|key|510134|text|从java7开始，我更喜欢使用Path。您只需将路径放入：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|510135|Path+dddDirectoryPath+=+Paths.get("C:/aaa/bbb/ccc/ddd/test.java");|code-block|syntax|javascript|510136|并创建一些get方法：|510137|public+String+getLastDirectoryName(Path+directoryPath)+{
+++int+nameCount+=+directoryPath.getNameCount();
+++return+directoryPath.getName(nameCount+-+1);
}|510138|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|$]]

From java 7 I would prefer to use Path. You only need to put path into:

<pre><code>Path dddDirectoryPath = Paths.get("C:/aaa/bbb/ccc/ddd/test.java");
</code></pre>

and create some get method:

<pre><code>public String getLastDirectoryName(Path directoryPath) {
 int nameCount = directoryPath.getNameCount();
 return directoryPath.getName(nameCount - 1);
}
</code></pre>

blocks|key|726535|text|++++//get+the+parentfolder+name
++++File+file+=+new+File(+System.getProperty("user.dir")+%2B+"/.");
++++String+parentPath+=+file.getParentFile().getName();|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|726536|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> //get the parentfolder name
 File file = new File( System.getProperty("user.dir") + "/.");
 String parentPath = file.getParentFile().getName();
</code></pre>

blocks|key|510175|text|对于Kotlin：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|510176|+fun+getFolderName()+{
++++++++++++
++++++++++++val+uri:+Uri
++++++++++++val+cursor:+Cursor?
++++
++++++++++++uri+=+MediaStore.Audio.Media.EXTERNAL_CONTENT_URI
++++++++++++val+projection+=+arrayOf(MediaStore.Audio.AudioColumns.DATA)
++++++++++++cursor+=+requireActivity().contentResolver.query(uri,+projection,+null,+null,+null)
++++++++++++if+(cursor+!=+null)+{
++++++++++++++++column_index_data+=+cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.DATA)
++++++++++++}
++++++++++++
++++++++++++while+(cursor!!.moveToNext())+{
++++
++++++++++++++++absolutePathOfImage+=+cursor.getString(column_index_data)
++++
++++
++++++++++++++++val+fileName:+String+=+File(absolutePathOfImage).parentFile.name
++++}
}|code-block|syntax|javascript|510177|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 Kotlin :
<pre><code> fun getFolderName() {
 
 val uri: Uri
 val cursor: Cursor?
 
 uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI
 val projection = arrayOf(MediaStore.Audio.AudioColumns.DATA)
 cursor = requireActivity().contentResolver.query(uri, projection, null, null, null)
 if (cursor != null) {
 column_index_data = cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.DATA)
 }
 
 while (cursor!!.moveToNext()) {
 
 absolutePathOfImage = cursor.getString(column_index_data)
 
 
 val fileName: String = File(absolutePathOfImage).parentFile.name
 }
}
</code></pre>

How to get <code>ddd</code> from the path name where the test.java resides.

<pre><code>File file = new File("C:/aaa/bbb/ccc/ddd/test.java");
</code></pre>

How to get just the parent directory name of a specific file

Kotlin

如何从test.java所在的路径名中获取ddd。File file = new File("C:/aaa/bbb/ccc/ddd/test.java");

问如何仅获取特定文件的父目录名称
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