Mastering the Java Long longValue Method

Introduction

In this lab, you will learn how to use the longValue() method in Java to get the long equivalent of a Long object. You will also understand the concepts of Boxing and Unboxing in Java.

Skills Graph

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Declare `Long` objects

In this step, declare two Long objects with the values of your choice.

Long n1 = 25L;
Long n2 = 46L;

Convert `Long` objects into `long`

In this step, use the longValue() method to convert the Long objects into their long equivalent.

// returns the value of the Long object n1 as a long
long i = n1.longValue();
// returns the value of the Long object n2 as a long
long j = n2.longValue();

Display the output

In this step, display the output on the console using System.out.println().

System.out.println("long value is " + i);
System.out.println("long value is " + j);

Get input from the user

In this step, get input from the user using the Scanner class.

System.out.print("Enter the value: ");
Scanner sc = new Scanner(System.in);
long i = sc.nextLong();

Convert `long` to `Long`

In this step, convert the long value into a Long object.

Long n = i;

Display the `long` value

In this step, use the longValue() method to get the long equivalent of the Long object and display it on the console.

System.out.println("Long Value is: " + n.longValue());

Compile and run the code

In this step, compile and run the code in the terminal using the following commands:

javac LongValueMethod.java
java LongValueMethod

Summary

In this lab, you learned how to use the longValue() method in Java to get the long equivalent of a Long object. You also learned the concepts of Boxing and Unboxing in Java.

Java Long longValue Method

Introduction

Skills Graph

Declare Long objects

Convert Long objects into long