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Java Double class longValue() method with example

Double class longValue() method: Here, we are going to learn about the longValue() method of Double class with its syntax and example.
Submitted by Preeti Jain, on September 22, 2019

Double class longValue() method

  • longValue() method is available in java.lang package.
  • longValue() method is used to return the value denoted by this Double 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 double 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 Double object.


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

public class LongValueOfDoubleClass {
    public static void main(String[] args) {
        // Variables initialization
        double d1 = 18.20;
        double d2 = 19.20;

        // It returns double value denoted by this Double do1 object
        // and converted to a long by calling value1.longValue()
        Double value1 = new Double(d1);

        // Display value1 result
        System.out.println("value1.longValue(): " + value1.longValue());

        // It returns double value denoted by this Double value2 object
        // and converted to a long by calling value2.longValue()
        Double value2 = new Double(d2);

        // Display value2 result
        System.out.println("value2.longValue(): " + value2.longValue());


value1.longValue(): 18
value2.longValue(): 19


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