How to Convert int to long in Java?

In Java, an int value can be converted into a long value by using the simple assignment operator. This is because this conversion is an Implicit type conversion in which a lower data type is automatically converted into a higher data type.

Here, the int value is converted into long value implicitly by using the assignment operator.

public class StudyTonight
{  
    public static void main(String args[])
    {  
        int i = 500;  
        long l = i;  
        System.out.println(" The long value is : " +l); 
    }
}

Output:

The long value is : 500

Also, we can convert an int value into a Long Object either by instantiating Long class or by using the Long.valueOf() method.

Here, the int value is converted into the Long Object by instantiating the class and using valueOf() method.

public class StudyTonight
{  
    public static void main(String args[])
    {  
        int i = 200;  
        long l = Long.valueOf(i); //conversion using the valueOf() method  
        System.out.println(i);  
        System.out.println(l);  
    }
}

Output:

200 200

Here, the int value is converted into long values implicitly by instantiating the long value.

public class StudyTonight
{  
    public static void main(String args[])throws Exception
    {  
        int n = 232;
        long l = new Long(n);
        System.out.println("long value is : " +l);
    }
}

Output:

long value is : 232