文件類字符串getAbsolutePath() (File Class String getAbsolutePath())

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

  軟件包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是絕對路徑，則此方法用于返回文件對象的絕對路徑(即，絕對路徑是諸如c：\\ Articles \\ myjava.txt這樣的完整路徑)，然后它將檢索文件對象的完整路徑。

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

  此方法的返回類型為String，因此它以字符串形式返回從根開始的絕對路徑。

• 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.

  在這種方法中，如果我們沒有在文件對象中給出絕對路徑，那么它將返回文件所在的文件對象的絕對路徑。

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

  如果無法訪問所需的值，則此方法可能引發異常(即Security Exception)。

Syntax:

句法：

String getAbsolutePath(){}

Parameter(s):

參數：

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

我們不會在File方法中將任何對象作為參數傳遞。

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.

該方法的返回類型為String，因此它以String形式返回文件對象的完整路徑。

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

輸出量

D:\Programs>javac GetAbsolutePath.javaD:\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

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

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