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Java HashSet Exercises, Practice & Solutions


This resource offers a total of 60 Java HashSet problems for practice. It includes 12 main exercises, each accompanied by solutions, detailed explanations, and four related problems.

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HashSet:

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

1. Append Element to HashSet

Write a Java program to append the specified element to the end of a hash set.
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2. Iterate HashSet Elements

Write a Java program to iterate through all elements in a hash list.
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3. Get HashSet Size

Write a Java program to get the number of elements in a hash set.
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4. Clear HashSet

Write a Java program to empty an hash set.
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5. Check if HashSet is Empty

Write a Java program to test if a hash set is empty or not.
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6. Clone HashSet

Write a Java program to clone a hash set to another hash set.
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7. Convert HashSet to Array

Write a Java program to convert a hash set to an array.
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8. Convert HashSet to TreeSet

Write a Java program to convert a hash set to a tree set.
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9. Find Elements Less Than 7 in TreeSet

Write a Java program to find numbers less than 7 in a tree set.
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10. Compare Two HashSets

Write a Java program to compare two hash set.
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11. Retain Common Elements in Sets

Write a Java program to compare two sets and retain elements that are the same.
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12. Remove All from HashSet

Write a Java program to remove all elements from a hash set.
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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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