When sorting objects using the Comparable interface, what happens if two objects have the same comparison value in the compareTo() method?
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When sorting objects using the Comparable interface, what happens if two objects have the same comparison value in the compareTo() method?
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- How can you implement multi-level sorting using the Comparable interface? Provide an example where objects are sorted by multiple criteria.What is the significance of the compareTo() method in the Comparable interface, and how does it work in comparison with other objects?How can you handle sorting for complex objects with multiple criteria using the Comparable interface? Provide an example.
- How can you handle cases where you need to sort objects in descending order using the Comparable interface?Discuss the limitations of the Comparable interface when it comes to sorting custom objects. When might you need to resort to using the Comparator interface instead?When implementing the Comparable interface, what considerations should be made regarding handling null values in objects? How can null values be managed during sorting?
- In R, how to find the number of rows in an object?Modify the Contact class in Chapter 10 so that the sorting methods invoked in PhoneList.java keeps the Contact objects sorted by phone number.Implement a test client that enables the user to specify the key and value fields in each query, along with a ST client FullLookupCSV that creates an array of ST objects (one for each field).
- Explain the role of the compareTo() method's return values (negative, zero, positive) in sorting objects with the Comparable interface. How can this be customized for various sorting requirements?What would be required to allow an OrderedStructure user to give an alternate ordering during the lifetime of a class? This method may be called sortBy and would only accept a Comparator as a parameter.Design and implement an insertSorted() method for the MyArrayList class. The method should receive a single object and insert it in its correct position. You can assume that the calling array is already in a sorted order. The calling array is therefore updated. Follow the three step method for designing the method. Develop the java code for the method. Create a test program to test the method thoroughly using the Integer wrapper class.