Methods in TREEMAP?

radhika743 · 23-02-07, 01:33 PM

Q.) How to ascend or descend the elements in Tree Map?

Q.) What is the advantage of TreeMap Over Hash Map?

Laxminarayanak · 23-02-07, 04:03 PM

Q.) What is the advantage of TreeMap Over Hash Map?
TreeMap is used when the keys should preserve some order. And the Hash Map is used when there is no need of preserving the order.
similarities
Hash Map and Tree Map both are not synchronized.
Both implements Abstract Map

Q.) How to ascend or descend the elements in Tree Map?
A) two ways of this
1.Firt one is implement the our own comparitor so that it will put the keys in the order which we want
2. Get the key set and use the external sorting of the keys by sorting the key set it self and retrive the values.

23-02-07, 01:33 PM	#1 (permalink)
radhika743 Senior Member Join Date: Aug 2006 Age: 28 Posts: 275 Thanks: 0 Thanked 5 Times in 5 Posts Thanks: 0 Thanked 5 Times in 5 Posts Rep Power: 5	Methods in TREEMAP? Q.) How to ascend or descend the elements in Tree Map? Q.) What is the advantage of TreeMap Over Hash Map?

23-02-07, 04:03 PM	#2 (permalink)
Laxminarayanak Member Join Date: Jan 2007 Posts: 32 Thanks: 3 Thanked 3 Times in 3 Posts Thanks: 3 Thanked 3 Times in 3 Posts Rep Power: 2	Re: Methods in TREEMAP? Q.) What is the advantage of TreeMap Over Hash Map? TreeMap is used when the keys should preserve some order. And the Hash Map is used when there is no need of preserving the order. similarities Hash Map and Tree Map both are not synchronized. Both implements Abstract Map Q.) How to ascend or descend the elements in Tree Map? A) two ways of this 1.Firt one is implement the our own comparitor so that it will put the keys in the order which we want 2. Get the key set and use the external sorting of the keys by sorting the key set it self and retrive the values. __________________ Cheers, Laxmi

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