文件類boolean isHidden() (File Class boolean isHidden())

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

  軟件包java.io.File.isHidden()中提供了此方法。

• This method is used to check whether the file is hidden or not.

  此方法用于檢查文件是否隱藏。

• The return type of this method is Boolean i.e. The value of this method is true or false if it returns true that means the file is hidden else return false so the file is not hidden.

  此方法的返回類型為布爾值，即，如果該方法的返回值為true，則該值為true或false，這意味著該文件已隱藏；否則返回false，因此該文件未被隱藏。

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

  如果未授予文件寫入權限，則此方法可能會引發異常(即Security Exception)。

Syntax:

句法：

    boolean isHidden(){
}

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 then in that case given file is hidden else returns false so the file is not hidden.

此方法的返回類型為布爾值，即返回true，則在這種情況下給定文件被隱藏，否則返回false，因此文件未被隱藏。

Java程序演示isHidden()方法的示例 (Java program to demonstrate example of isHidden() 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 ToCheckFileHidden {
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("C:\\Users\\computer clinic\\OneDrive\\Articles\\myjava1.txt");
// By using isHidden() is used to check whether the file 
// is hidden or not . It returns true because given file is hidden.
if (file1.isHidden())
System.out.println("This file " + " " + file1.getName() + " " + "is hidden");
else
System.out.println("This file" + " " + file1.getName() + " " + "is not hidden");
// By using isHidden() is used to check whether the 
// file is hidden or not. It returns false because given file 
// is not hidden.
if (file2.isHidden())
System.out.println("This file " + " " + file2.getName() + " " + "is hidden");
else
System.out.println("This file " + " " + file2.getName() + " " + "is not hidden");
} catch (Exception e) {
System.out.println("An error occurred.");
e.printStackTrace();
}
}
}

Output

輸出量

D:\Programs>javac ToCheckFileHidden.java
D:\Programs>java ToCheckFileHidden
This file  myjava.txt is hidden
This file  myjava1.txt is not hidden

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