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How do you decide when to use HashMap and when to use TreeMap?
When we want to perform deletion, insertion and locate elements in a Map then HashMap is used.
Whereas TreeMap is used when we want to traverse elements in a sorted order. Depending upon size of collection, adding elements to HashMap is easy. But for sorted elements traversal we can convert HashMap into TreeMap.
Why there is a need to use primary key in database ? Primary key is a constraint basically used in datdabase to uniquely identify the records in the database.
1. Which of the following are not valid Java identifiers, and why? (a) wolVes (b) United(there is only one) (c) 87 (d) 5 3 (e) Real ale (f) isFound?by 2. A cla
Project Description: We have an encrypted HSQL Database which we need to convert into CSV format. HSQL DB . We have java application jar file which reads that database but no
Describe the Superclass in Inheritance ? In this example you start through defining a more common MotorVehicle class. public class MotorVehicle { private String licensePlat
Illustrate the parser method The below table summarizes the parser methods available to a java programmer.
AOP Alliance is an open-source project whose goal is to promote adoption of AOP and interoperability between different AOP implementations by describing a common set of interfaces
1) Listing of the source code ( named Rainfall.java ) for your program 2) Two sample output/execution/runs of your program Optional Group Work: This assignment may be done in
write a program in java using array and scanner class to generate padovan series
Normal 0 false false false EN-IN X-NONE X-NONE
The program: 2 classes one called Student, one called Grades Functional Requirements: Ask for how many students u need to enter the program must: prompt the user to enter the
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