With this example we are going to demonstrate how to use a long type in Java. The long data type is a 64-bit signed two’s complement integer. It has a minimum value of -9,223,372,036,854,775,808 and a maximum value of 9,223,372,036,854,775,807 (inclusive). Use this data type when you need a range of values wider than those provided by int.

    In short, to create a variable of long type you should type the long keyword in your variable. In the example the System.currentTimeMillis() returns a long number that is the current time in milliseconds.

Let’s take a look at the code snippet that follows:  

package com.javacodegeeks.snippets.basics;

public class LongExample {
	public static void main(String[] args) {
		long l1 = System.currentTimeMillis();
		long l2 = 1000*1000;
		System.out.println("Value of long l1 is: " + l1);
		System.out.println("Value of long l2 is: " + l2);



Value of long l1 is: 1318967029108
Value of long l2 is: 1000000

This was an example of how to use a long type in Java.

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Ilias Tsagklis

Ilias is a software developer turned online entrepreneur. He is co-founder and Executive Editor at Java Code Geeks.
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