What is PrintWriter in Java and how does it work?

The implementation of the writer class in Java is the PrintWriter Class. The formatted representation of objects is printed to a text output stream. Let us dig a bit deeper and understand the concept in detail. Here is the agenda for this article:

• What is the PrintWriter class in Java?
• Constructors of PrintWriter class
• Class Methods
• Example

Let’s begin!

Starting off with the definition of PrintWriter class in Java!

What is the PrintWriter class in Java?

The Java.io.PrintWriter class prints formatted representations of objects to a text-output stream. This class implements all the print methods that are found in printstream.

With this simple definition, let me show you the class declaration.

public class PrintWriter
extends Writer

This class inherits methods from the following class −
● Java.io.Object

Now, the next segment will tell you the constructors used in the PrintWriter class.

Constructors of PrintWriter class in Java

Below is the list of constructors of PrintWriter class:

After understanding the constructors of this class, let us study the methods provided by the PrintWriter class.

Class Methods

Now, let’s hop onto the implementation process

Example

Code:

import java.io.File;
import java.io.PrintWriter;
public class Example {
public static void main(String[] args) throws Exception {
//Data to write on Console using PrintWriter
PrintWriter writer = new PrintWriter(System.out);
writer.write("Welcome to Edureka!");
writer.flush();
writer.close();
//Data to write in File using PrintWriter
PrintWriter writer1 =null;
writer1 = new PrintWriter(new File("D:testout.txt"));
writer1.write("Learn different technologies.");
writer1.flush();
writer1.close();
}
}

Output:
Learn different technologies.

With this, we have reached towards the end of this tutorial. I hope the concept is clear to you now. Keep reading, keep exploring!

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