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Synchronization on Objects

Why does java support synchronization on the Object Class? How is it different from a synchronized method?

•18+ Adults Only

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Java Stack as a List

Why is a java Stack class inherit from a List? What are the pros and cons? Is the inheritance approach correct in this case? What are other possible approaches?

#java stack list

How is the Java set implemented internally?

It is implemented as a Map of values.

#Java set

Java Hashcode and Equals

What is the significance of hashcode and equals methods? When should one override them?

#Java

Java overloaded methods with Generics

Is the following class compile and run successfully in Java 7? What are the changes you will suggest to make it work.

public class Test {

private long sum(List<Integer> numbers) {

//calculates the sum of integers here

return answer;

}

private long sum(List<Long> numbers) {

//calculates the sum of longs here

return answer;

}

#Java #method overloading generics

•18+ Adults Only

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