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Java TreeMap Exercises, Practice & Solutions


This resource offers a total of 130 Java TreeMap problems for practice. It includes 26 main exercises, each accompanied by solutions, detailed explanations, and four related problems.

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TreeMap:

In Java, TreeMap is an implementation of the SortedMap interface provided by the Java Collections Framework. It's part of the java.util package.

1. Associate Value with Key in TreeMap

Write a Java program to associate the specified value with the specified key in a Tree Map.
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2. Copy TreeMap to Another TreeMap

Write a Java program to copy Tree Map's content to another Tree Map.
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3. Search Key in TreeMap

Write a Java program to search for a key in a Tree Map.
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4. Search Value in TreeMap

Write a Java program to search for a value in a Tree Map.
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5. Get All Keys from TreeMap

Write a Java program to get all keys from a Tree Map.
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6. Delete All Elements from TreeMap

Write a Java program to delete all elements from a Tree Map.
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7. Sort TreeMap Keys with Comparator

Write a Java program to sort keys in a Tree Map by using a comparator.
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8. Get Mapping with Greatest and Least Key

Write a Java program to get a key-value mapping associated with the greatest key and the least key in a map.
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9. Get First and Last Key in TreeMap

Write a Java program to get the first (lowest) key and the last (highest) key currently in a map.
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10. Get Reverse View of TreeMap Keys

Write a Java program to get a reverse order view of the keys contained in a given map.
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11. Get Mapping with Floor Key

Write a Java program to get a key-value mapping associated with the greatest key less than or equal to the given key.
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12. Get Floor Key in TreeMap

Write a Java program to get the greatest key less than or equal to the given key.
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13. Get Head Map with Keys Less Than Given Key

Write a Java program to get the portion of a map whose keys are strictly less than a given key.
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14. Get Head Map with Optional Inclusive Key

Write a Java program to get the portion of this map whose keys are less than (or equal to, if inclusive is true) a given key.
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15. Get Higher Key in TreeMap

Write a Java program to get the least key strictly greater than the given key. Return null if there is no such key.
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16. Get Mapping with Lower Key

Write a Java program to get a key-value mapping associated with the greatest key strictly less than the given key. Return null if there is no such key.
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17. Get Lower Key in TreeMap

Write a Java program to get the greatest key strictly less than the given key. Return null if there is no such key.
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18. Get NavigableSet View of Keys

Write a Java program to get a NavigableSet view of keys in a map.
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19. Poll First Entry from TreeMap

Write a Java program to remove and get a key-value mapping associated with the least key in a map.
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20. Poll Last Entry from TreeMap

Write a Java program to remove and get a key-value mapping associated with the greatest key in this map.
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21. Get SubMap from Key to Exclusive Key

Write a Java program to get the portion of a map whose keys range from a given key (inclusive) to another key (exclusive).
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22. Get SubMap from Key to Key

Write a Java program to get the portion of a map whose keys range from a given key to another key.
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23. Get TailMap from Inclusive Key

Write a Java program to get a portion of a map whose keys are greater than or equal to a given key.
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24. Get TailMap from Exclusive Key

Write a Java program to get a portion of a map whose keys are greater than a given key.
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25. Get Mapping with Ceiling Key

Write a Java program to get a key-value mapping associated with the least key greater than or equal to the given key. Return null if there is no such key.
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26. Get Ceiling Key in TreeMap

Write a Java program to get the least key greater than or equal to the given key. Returns null if there is no such key.
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Java Practice online

More to Come !

Do not submit any solution of the above exercises at here, if you want to contribute go to the appropriate exercise page.



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