Why class is used in java?


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What is repaint in java?

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What are j2ee components?

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What is mean by connection pooling?

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Is java 100 percent pure object oriented?

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for example we are login into the irctc server from there it will go to the selected bank and deduct amount and come back to the irctc. so if we are developing this in java means will it be run on the same session. but as per my knowledge bank is separate and irctc is separate URL's so it will use two different sessions then how it is maintaining same session through out application and even it uses the payment gateway? how it is working can any one help me on that??

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What is the container?

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What is layout in java?

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Explain the j2ee tiers.

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What is java 2 platform, enterprise edition (j2ee)?

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