You can use the tempfile module to create a unique temporary directory in the most secure manner possible. There are no race conditions in the directory’s creation. The directory is readable, writable and searchable only by the creating user ID. Note that the user of mkdtemp() is responsible for deleting the temporary directory when done with it. To create a new temporary directory, use it as follows −import tempfile _, temp_dir_path = tempfile.mkdtemp() # Do what you want with this directory # And remove the directory when doneNote that you need to manually delete this directory after you're done with ... Read More

Identifiers in Java are case-sensitive, therefore, hello and Hello are considered as two different identifiers.

Temporary files are created to store data temporarily during the execution of a program or while working with large amount of data. To create a temporary file we can use the tempfile module, as it creates unique names and stores in platform-dependent default location . Specifically the tempfile module is used as the files created using this module are deleted as soon as they are closed.  Creating a Temporary File A temporary file is created using the TemporaryFile() function of the tempfile module. This by default opens the file in 'w+b' mode, which allows to both read and write the ... Read More

KeywordsKeywords in Java convey a special meaning to the compiler therefore, these cannot be used as identifiers. Java provides a set of 50 keywords.abstractcontinuefornewswitchassertdefaultgotopackagesynchronizedbooleandoifprivatethisbreakdoubleimplementsprotectedthrowbyteelseimportpublicthrowscaseenuminstanceofreturntransientcatchextendsintshorttrycharfinallongstrictfpvolatileconstfloatnativesuperwhileReserved wordsAmong the list of key words list mentioned above the key words goto and const are currently not in use. They are reserved words (for the future use).

A valid identifier in java – Must begin with a letter (A to Z or a to z), currency character ($) or an underscore (_). Can have any combination of characters after the first character. Cannot be a keyword. Example Following example shows various possible identifiers used to declare a variable in Java. Live Demo public class VariableTest { public static void main(String args[]) { // Declaring a variable named num int num = 1; ... Read More

The act of renaming multiple files recursively in Python can be a useful task when it is required to change the names of multiple files within a directory and its subdirectories. If you need to replace certain characters, add prefixes or suffixes, or completely change the file names, Python has powerful tools to accomplish such operations. In this article, we explore a few different approaches to renaming multiple files recursively using Python. We consider some code examples, each demonstrating a unique method to achieve this task. So let us get started right away and learn how to rename multiple files ... Read More

Multiline comments (/* */) are used to comment multiple lines in the source code. Example Live Demo public class CommentsExample { /* Following is the main method here, We create a variable named num. And, print its value * */ public static void main(String args[]) { //Declaring a variable named num int num = 1; ... Read More

There are times when you want to organize your files or update the directory names to better reflect their contents. In such scenarios, the operation of renaming directories becomes helpful and it is a common task that we often encounter in Python file management. There is provision of several modules and methods in Python that makes renaming directories an easy task. In this article, we explore different ways how you can rename directories using Python code. You will learn this skill by practicing the code examples and explanations discussed in this article. Making Use of the OS Module ... Read More

To comment a particular line just place ‘double back slash (//)’ before the line as shown below. // Hello this line is commented Example Following example demonstrates the usage of single line comments in Java. Live Demo public class CommentsExample { public static void main(String args[]) { //Declaring a variable named num int num = 1; //Printing the value of the variable num System.out.println("value if the variable num: "+num); } } Output value if the variable num: 1

The java.lang package is the default package in Java, by default, it will be imported. Therefore, there is no need to import this package explicitly. i.e. without importing you can access the classes of this package. Example If you observe the following example here we haven’t imported the lang package explicitly but, still, we are able to calculate the square root of a number using the sqrt() method of the java.lang.Math class. Live Demo public class LangTest { public static void main(String args[]) { int num = 100; ... Read More