A) Built a Java class Triangle with the private data members: 1) base: double type, 2) height: double type. Then, develop a constructor with parameters used to assign values to the data members. The methods include calculate_area which is used to compute area of a triangle and will return the results as decimal values.

B) Then, use a separate Java program file to create three triangle objects with different bases and heights and then display their areas and find out which one has the highest area.