Answer Posted / royal

It is introduced in java 2 before to that there are five legacy classes and one legacy interface
Vector
HashTable
Properties legacy classes Eenumeration legacy interface
Dictionary
Stack
There are some problem in above listed legacy classes to avoid these problem Sun has introduced collection framework in Java 2.

























In the collection frame work there are the three different category:--------
List :----- collection of object with duplicate.
Set :----- collection of object without duplicate.
Map :--- collection of key value pairs

Are actions thread safe?

973

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Which configuration file is used for storing jsp configuration information in struts?

1006

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Which class is the Front Controller in Struts2?

976

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What is the differences between struts1 and struts2?

937

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What is the difference between plain-validator and field-validator?

953

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What are the steps of struts installation?

1006

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What is struts?

981

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Which file is used by controller to get mapping information for request routing?

1058

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What are the pros of struts 2?

973

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What is the purpose of form-be tag in struct-config.xml?

959

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What is the purpose of @customvalidator annotation?

996

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Explain how to work with error tags?

1006

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What is struts2 namespace?

920

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Why do we need struts?

924

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What is the purpose of @stringlengthfieldvalidator annotation?

1099

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