can anybody explain me in one sentannce each that when to use which collection? I am tlking about all java.util classes starting like hash*,tree*,linked*....etc
your question sounds like "can anybody teach me data structures in one sentence". This is impossible. Data structures is one of the key elements in programming. Do a search for java data structures and get some material, or buy a book.
You gotta stop hangin' out with Thomas Paul. Michael Morris
Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius - and a lot of courage - to move in the opposite direction. - Ernst F. Schumacher
Don't get me started about those stupid light bulbs.