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Java Integer class longValue() method with example

Integer class longValue() method: Here, we are going to learn about the longValue() method of Integer class with its syntax and example.
Submitted by Preeti Jain, on September 25, 2019

Integer class longValue() method

  • longValue() method is available in java.lang package.
  • longValue() method is used to return the value denoted by this Integer object converted to type long (by casting).
  • longValue() method is a non-static method, it is accessible with class object only and if we try to access the method with the class name then we will get an error.
  • longValue() method does not throw an exception at the time of conversion from Integer to long.


    public long longValue();


  • It does not accept any parameter.

Return value:

The return type of this method is long, it returns a converted (from type double to long) value represented by this Integer object.


// Java program to demonstrate the example 
// of longValue() method of Integer class

public class LongValueOfIntegerClass {
    public static void main(String[] args) {
        // Variables initialization
        int i1 = 20;
        int i2 = 30;

        // It returns integer value denoted by this Integer ob1 object
        // and converted to a long by calling ob1.longValue()
        Integer ob1 = new Integer(i1);

        // Display ob1 result
        System.out.println("ob1.longValue(): " + ob1.longValue());

        // It returns integer value denoted by this Integer ob2 object
        // and converted to a long by calling ob2.longValue()
        Integer ob2 = new Integer(i2);

        // Display ob2 result
        System.out.println("ob2.longValue(): " + ob2.longValue());


ob1.longValue(): 20
ob2.longValue(): 30


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