文件類void deleteOnExit() (File Class void deleteOnExit())

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

  軟件包java.io.File.deleteOnExit()中提供了此方法。

• This method is used to delete the file or directory when the virtual machine terminates.

  虛擬機終止時，此方法用于刪除文件或目錄。

• The return type of this method is void so it does not return anything.

  此方法的返回類型為void，因此它不返回任何內容。

• In this method delete file or directories in the reverse order, that means last created file or directories will be deleted first when virtual machine terminates.

  在此方法中，以相反的順序刪除文件或目錄，這意味著在虛擬機終止時，將首先刪除最后創建的文件或目錄。

• This method may raise an exception (i.e. Security Exception) delete access is not given to the file.

  此方法可能會引發異常(即Security Exception)，但未授予該文件訪問權限。

Syntax:

句法：

    void deleteOnExit(){
}

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 void, it does not return anything.

此方法的返回類型為void ，它不返回任何內容。

Java程序，演示deleteOnExit()方法的示例 (Java program to demonstrate example of deleteOnExit() 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;
class DeleteFileOnExit {
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");
// By using getAbsolutePath() return the complete 
// path of the file
String abs_path = file1.getAbsolutePath();
// Display absolute path of the file object 
System.out.println("The absolute path of the file 1 if given path is absolute :" + " " + abs_path);
// By using deleteOnExit() method to delete the file 
// when the virtual machine terminates
file1.deleteOnExit();
System.out.println("This file will delete as soon as the virtual machine terminates");
} catch (Exception e) {
System.out.println("An error occurred.");
e.printStackTrace();
}
}
}

Output

輸出量

E:\Programs>javac DeleteFileOnExit.java
E:\Programs>java DeleteFileOnExit
The absolute path of the file 1 if given path is absolute : C:\Users\computer clinic\OneDrive\Articles\myjava.txt
This file will delete as soon as the virtual machine terminates

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