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 methodsimport java.io.File;// import the Exception class because it may raise an // exception when working with filesimport 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.javaD:\Programs>java GetAbsolutePathThe path of the file 1 if given path is absolute : C:\Users\computer clinic\OneDrive\myjava.txtThe path of the file2 if given path is not absolute : D:\Programs\java.txt

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