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How to convert Java int to long

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.

Example 1:

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); 
	}
}


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.

Example 2:

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);  
	}
}


200
200

Example 3:

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);
	}
}


long value is : 232