public double doubleValue()

// Java program to demonstrate the
// doubleValue() method
  
import java.lang.*;
import java.util.concurrent.atomic.DoubleAccumulator;
  
public class GFG {
    public static void main(String args[])
    {
  
        DoubleAccumulator num
            = new DoubleAccumulator(
                Double::sum, 0L);
  
        // accumulate operation on num
        num.accumulate(42);
        num.accumulate(10);
  
        // Print before doubleValue operation
        System.out.println("Old value is: "
                           + num);
  
        // Print after doubleValue operation
        System.out.println("Current double value is: "
                           + num.doubleValue());
    }
}

Old value is: 52.0
Current double value is: 52.0

// Java program to demonstrate the
// doubleValue() method
  
import java.lang.*;
import java.util.concurrent.atomic.DoubleAccumulator;
  
public class GFG {
    public static void main(String args[])
    {
  
        DoubleAccumulator num
            = new DoubleAccumulator(
                Double::sum, 0L);
  
        // accumulate operation on num
        num.accumulate(32);
        num.accumulate(45);
  
        // Print before doubleValue operation
        System.out.println("Old value is: "
                           + num);
  
        // Print after doubleValue operation
        System.out.println("Current double value is: "
                           + num.doubleValue());
    }
}

Old value is: 77.0
Current double value is: 77.0