examples of TreeMap in java programming

examplegeek
2022-05-24
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TreeMap:

  • Sorted Map.
  • Like Tree set, we can construct a sort order with the constructor.

Example:

public class Fruit{
public static void main(String[ ]args){
TreeMap<Sting,String> names =new TreeMap<String,String>( );
names.put(“key1”,“cherry”);
names.put(“key2”,“banana”);
names.put(“key3”,“apple”);
names.put(“key4”,“kiwi”);
names.put(“key2”,“orange”);
System.out.println(names);
}
}

Output:

{key1=cherry, key2=banana, key3 =apple, key4=kiwi}

It is sorted in ascending order based on the key. Duplicate keys are not allowed.

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