Programming Articles - Page 2085 of 3363

An important feature introduced in Java 9 is Module. By using a module, we can divide the code into smaller components called modules. It means each module has its own responsibility and declare its dependency on other modules to work correctly.Below are the steps to create a modular project in Java 9:Initially, we can create a file named "module-info.java" and add to a package(module) for which it is created. For instance, if our package name is com.mycompany.mypackage then the file goes to the same package (src/com.mycompany.mypackage/module-info.java). We can create a module by declaring "exports" and "requires" expressions.If our modules require another module ... Read More

In analyzing data or processing data using python, we come across situations where the given list has to be remodeled or reshaped to get lists with different columns. We can achieve that with multiple approaches as discussed below.Using SlicingWe can slice the list at certain elements to create the columnar structure. Here we convert the given list into a new list where the elements are split form the middle. We sue two for loops. The outer one splits the elements from the zeroth element to the second element and the inner one from the second element to the last.Example Live Demox ... Read More

Python provides lot of flexibility to handle different types of data structures. There may be a need when you have to convert one Data Structure to another for a better use or better analysis of the data. In this article we will see how to convert a Python set to a Python dictionary.Using zip and dictThe dict() can be used to take input parameters and convert them to a dictionary. We also use the zip function to group the keys and values together which finally become the key value pair in the dictionary.Example Live Demolist_keys = {1, 2, 3, 4} list_values ... Read More

Printing double quotes is tricky, as it itself is required as part of syntax to print the strings by surrounding them. In this article we will see how these double quotes can be printed using print statement.The below scenarios will not print the double quote. The first two lines of code will give no output while the last one will through error.Example Live Demoprint(" ") print(" " " ") print(""aString"")OutputRunning the above code gives us the following result −;print(""aString"") ^ SyntaxError: invalid syntaxBut if we surround the strings with proper quotes as shown below, then the quotes can themselves get printed. ... Read More

A bigram is formed by creating a pair of words from every two consecutive words from a given sentence. In python, this technique is heavily used in text analytics. Below we see two approaches on how to achieve this.Using enumerate and splitUsing these two methods we first split the sentence into multiple words and then use the enumerate function to create a pair of words from consecutive words.Example Live Demolist = ['Stop. look left right. go'] print ("The given list is : " + str(list)) # Using enumerate() and split() for Bigram formation output = [(k, m.split()[n + 1]) for m ... Read More

If we print a given list of strings as it is, we have to use quotes and fill in a pair of matching quotes appropriately. We can avoid using quotes in the print statements by following two approaches.Using join()The join method helps us in printing the output of list elements by using any separator we choose. In the below example we choose ** as separator.Example Live Demolist = ['Mon', 'Tue', 'Wed'] # The given list print("The given list is : " + str(list)) print("The formatted output is : ") print(' ** '.join(list))OutputRunning the above code gives us the following result −The ... Read More

Instead of hard coding the path to a file to be used by a python program, we can allow the user to browse the os folder structure using a GUI and let the user select the file. This is achieved using the tkinter module in which we define a canvas and put a button on it to browse the files.In the below program, we define a file opener function. We only use this function to open a text file as python can read the content of a text file and print it out in a much readable manner. We can ... Read More

The module is a collection of code, data, and resources. It is a set of related packages and types like classes, abstract classes, and interfaces with code, data files, and some static resources.Below are some of the characteristics of a module.Characteristics of a module:A module must define an interface for communication with other modules.A module defines the separation between a module interface and module implementation.A module presents a set of properties that contains information.Two or more modules have nested together.A module has a clear, defined responsibility. Each function implemented by only one module.A module must able to tested independently from other modules.An error in a module can't propagate to other ... Read More

In this article, we will learn about the differences between Optional.ifPresentOrElse() and Optional.or() methods in Java 9. Both Optional.ifPresentOrElse() and Optional.or() methods were introduced in Java 9 to improve its functionality. Optional Class Optional Class is a part of java.util package, and it was introduced in Java 8. It is a container object that may or may not contain a non-null value. It helps in writing code without using too many null checks. The following are some of the common methods of the Optional Class: empty(): This method returns an empty Optional instance. ... Read More

In this article, we will learn to handle an exception in JShell in Java 9. We will learn about the JShell, exceptions in Java, JShell exceptions, their handling, and Types of exceptions in JShell with examples. What is JShell? JShell is a new command-line interactive REPL (Read-Evaluate-Print-Loop) tool introduced in Java 9 to evaluate declarations, statements, and expressions written in Java. This tool also allows us to execute Java code snippets and get immediate results. C:\Users\User>jshell | Welcome to JShell -- Version 9.0.4 | For an introduction type: /help intro jshell> JShell provides a fast and friendly environment that ... Read More