Does isempty check for null?

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What type of language is java?

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Can we have multiple classes in a single file?

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Difference between Primary key and unique key?

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Why is singleton instance static?

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Can we have multiple public classes in a java source file?

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I Have a class abstract with one abstract method, so that method should override in the subclass, but i dont want to override, if i am not override what will happen? If compilation will occur then i dont want to give compilation error, then what we need to do??? See the sample program. public abstract class AbstractExample { public abstract void sampleMethod(); } public class AbstractExampleImple extends AbstractExample { }

2 Answers   Mphasis,

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What is java lang string?

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Explain creating threads by implementing runnable class?

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How is java hashmap implemented?

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What are the disadvantages of using inner classes?

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What is keyword in oop?

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