文件類布爾型delete() (File Class boolean delete())

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

  軟件包java.io.File.delete()中提供了此方法。

• This method is used to delete file or directory by using delete() method and this method is accessible with the File object.

  此方法用于通過使用delete()方法刪除文件或目錄，并且可以通過File對象訪問此方法。

• The return type of this method is Boolean i.e. it returns true or false if true that means file is successfully deleted and returns false that means the file is failed to delete.

  此方法的返回類型為Boolean，即返回true或false，如果為true表示文件已成功刪除，則返回false表示文件刪除失敗。

Syntax:

句法：

    boolean delete(){
}

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 Boolean i.e. it returns true or false if true that means file is successfully created else returns false that means the file is failed to delete.

此方法的返回類型為Boolean，即返回true或false，如果為true則表示文件已成功創建，否則返回false表示文件無法刪除。

Java程序演示delete()方法的示例 (Java program to demonstrate example of delete() 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 DeleteFile {
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\\javafiles.txt");
File file2 = new File("C:\\Users\\computer clinic\\OneDrive\\Articles\\myjav.txt");
// By using delete() method returns true that's means 
// file is deleted successfully.
if (file1.delete())
System.out.println("File deleted Successfully" + " " + file1.getName());
else
System.out.println("File failure of deletion " + file1.getName());
// By using delete() method returns false that's means 
// file failure of deletion.
if (file2.delete())
System.out.println("File deleted Successfully" + file2.getName());
else
System.out.println("File failure of deletion" + " " + file2.getName());
} catch (Exception e) {
System.out.println("An error occurred.");
e.printStackTrace();
}
}
}

Output

輸出量

D:\Programs>javac DeleteFile.java
D:\Programs>java DeleteFile
File deleted Successfully C:\Users\computer clinic\OneDrive\Articles\javafiles.txt
File failure of deletion C:\Users\computer clinic\OneDrive\Articles\myjav.txt

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