The java.DoubleAdder.doubleValue() is an inbuilt method in java that is equivalent to the method sum(), that is it returns current sum value. When the object of the class is created its initial value is zero.
public double doubleValue()
Parameters: The method does not accepts any parameter.
Return value: This method returns the current sum.
Below programs illustrate the above method:
the value after doubleValue() is: 52.0
the value after doubleValue() is: 72.0
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