publicclassStringPrograms{publicstaticvoidmain(String[]args){Stringstr="123";System.out.println(reverse(str));}publicstaticStringreverse(Stringin){if(in==null)thrownewIllegalArgumentException("Null is not valid
Looking forward to appear in Java Interview, here are the key 100+ Java Interview Questions with Answers only for you including some of the tricky questions with answers.Table of ContentsSr.No.Question 1 What are new Java8 Features? 2 Difference between GET & POST METHODS? 3 Difference betwee...
Even when you're making yet another CRUD application, there're always some edge cases, some tricky things, and from time to time someone asks "Hey, what's gonna happen if I do this and this under these circumstances?" and you say "Hm, that's a very good question.". 无论您是否了解...
I don’t rate it as high as Effective Java and Java Concurrency in Practice, but you can still give it a go, particularly to check your knowledge about Java and its corner cases, which will help you to answer some of the tricky Java questions from interviews. 在实践中,我没有将它评为“...
Starting with0and1,theFibonacci Sequenceis a sequence of numbers where each number is defined as the sum of the two numbers proceeding it:0 1 1 2 3 5 8 13 21 34 55… So, given a numbern, our problem is to find then-th element ofFibonacci Sequence.To implement a recursive solution,...
object that it leaks, but it tells you, with very low overhead, what requests you need to look at inside a memory profiler. Finding memory leaks in a production environment without crashing your application server is tricky, but tools with these monitoring capabilities make your job much ...
Next, we’ll see several approaches to solving the problem. We’ll use unit test assertions to verify each solution. 3. Using theCollections.sort()Method First, let’s see how to solve the problem if our Java is older than Java 8. ...
Tricky one but he managed to write using while and for loop. 13. When do you override hashcode and equals() ? Whenever necessary especially if you want to do equality check or want to use your object as key in HashMap. check this for writing equals method correctly5 tips on equals in...
Specifying how equals should behave is only of one many tricky decisions you will have to make. As Doug Lea put it more than 20 years ago “the problem with defining equals as class method is that there are too many senses of equals for one method to support. and the author of a ...
If you as teacher gives the questions to the students, verbatim or close to it, ahead of time, you are cheating. But I get it. You have to. You are forced to do this, and besides, everyone else cheats as well. You are just playing the game as much as everyone else is, because ...