文件类字符串getAbsolutePath() (File Class String getAbsolutePath())

• This method is available in package java.io.File.getAbsolutePath().

  软件包java.io.File.getAbsolutePath()中提供了此方法。

• This method is used to return the absolute path of the file object (i.e absolute path is the complete path like this c:\\ Articles\\myjava.txt) if filepath is absolute then it retrieve the complete path of the file object.

  如果filepath是绝对路径，则此方法用于返回文件对象的绝对路径(即，绝对路径是诸如c：\\ Articles \\ myjava.txt这样的完整路径)，然后它将检索文件对象的完整路径。

• The return type of this method is String so it returns the absolute path from the root in a string form.

  此方法的返回类型为String，因此它以字符串形式返回从根开始的绝对路径。

• In this method, if we don’t give an absolute path in the file object then also it will return the absolute path of file object where your file exists.

  在这种方法中，如果我们没有在文件对象中给出绝对路径，那么它将返回文件所在的文件对象的绝对路径。

• This method may raise an exception( i.e. Security Exception) if the desired value cannot be accessed.

  如果无法访问所需的值，则此方法可能引发异常(即Security Exception)。

Syntax:

句法：

    String getAbsolutePath(){
}

Parameter(s):

参数：

We don't pass any object as a parameter in the method of the File.

我们不会在File方法中将任何对象作为参数传递。

Return value:

返回值：

The return type of this method is String so it returns the complete path of the file object as a String.

该方法的返回类型为String，因此它以String形式返回文件对象的完整路径。

Java程序演示getAbsolutePath()方法的示例 (Java program to demonstrate example of getAbsolutePath() method)

// import the File class because we will use File class methods
import java.io.File;
// import the Exception class because it may raise an
// exception when working with files
import java.lang.Exception;
public class GetAbsolutePath {public static void main(String[] args) {try {// Specify the path of file and we use double slashes to
// escape '\' character sequence for windows otherwise
// it will be considerable as url.
File file1 = new File("C:\\Users\\computer clinic\\OneDrive\\Articles\\myjava.txt");
File file2 = new File("java.txt");
// By using getAbsolutePath() return the complete
// path(whatever you have given in the file object) of the
// file object because in the file1 object we already given
// absolute path
// [C:\\Users\\computer clinic\\OneDrive\\Articles\\myjava.txt]
String abs_path1 = file1.getAbsolutePath();
// Display absolute path of the file object if given path is absolute.
System.out.println("The path of the file 1 if given path is absolute :" + " " + abs_path1);
// By using getAbsolutePath() return the complete path of the File
// object even we have not given full path or absolute path is
// not given [i.e.(java.txt) so it return the whole path
// with filename where file exists ]
String abs_path2 = file2.getAbsolutePath();
// Display absolute path of the file object if given path is not absolute.
System.out.println("The path of the file2 if given path is not absolute :" + " " + abs_path2);
} catch (Exception e) {System.out.println("An error occurred.");
e.printStackTrace();
}
}
}

Output

输出量

D:\Programs>javac GetAbsolutePath.java
D:\Programs>java GetAbsolutePath
The path of the file 1 if given path is absolute : C:\Users\computer clinic\OneDrive\myjava.txt
The path of the file2 if given path is not absolute : D:\Programs\java.txt

翻译自: https://www.includehelp.com/java/file-class-string-getabsolutepath-method-with-example.aspx