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Learn Java by Example: Java Program to convert int type variables to long

By on Wednesday, April 28, 2021

Java Program to convert int type variables to long

In this program, we will learn to convert integer (int) variables into the long variables in Java.

 

Example 1: Java Program to Convert int to long using Typecasting


class Main{
  public static void main(String[] args){

    // create int variables
    int a = 25;
    int b = 34;

    // convert int into long
    // using typecasting
    long c = a;
    long d = b;

    System.out.println(c);    // 25
    System.out.println(d);    // 34
  }
}

In the above example, we have int type variables a and b. Notice the lines,

long c = a;

Here, the int type variable is automatically converted into long. It is because long is a higher data type and int is a lower data type.

Hence, there will be no loss in data while converting from int to long. This is called widening typecasting.

Example 2: Java Program to Convert int into object of Long using valueof()

We can convert the int type variable into an object of the Long class. For example,


class Main{
  public static void main(String[] args){

    // create int variables
    int a = 251;

    // convert to an object of Long
    // using valueOf()
    Long obj = Long.valueOf(a);

    System.out.println(obj);    // 251
  }
}

In the above example, we have used the Long.valueOf() method to convert the variable a into an object of Long.

Here, Long is a wrapper class in Java.

 

 

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Disclaimer: The information and code presented within this recipe/tutorial is only for educational and coaching purposes for beginners and developers. Anyone can practice and apply the recipe/tutorial presented here, but the reader is taking full responsibility for his/her actions. The author (content curator) of this recipe (code / program) has made every effort to ensure the accuracy of the information was correct at time of publication. The author (content curator) does not assume and hereby disclaims any liability to any party for any loss, damage, or disruption caused by errors or omissions, whether such errors or omissions result from accident, negligence, or any other cause. The information presented here could also be found in public knowledge domains.
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