What is struts in java?
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What's the difference between an abstract class and interface in java?
Describe what a thread-local variable is in java?
why string constant pool in java
What is difference between compatible and incompatible changes in serialization?
How do you create a bulleted list?
What is singleton math?
How do you read a char in java?
How are the elements of a gridbaglayout organized in java programming?
explain me with a code snippet about the generation and handling of null point exceptions.
How do you use wildcards?
Which way a developer should use for creating thread, i.e. Sub classing thread or implementing runnable.
What is widening and narrowing in java? Discuss with an example.