Java HashSet Exercises, Practice & Solutions

Java Collection: HashSet Exercises [12 exercises with solution]

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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. Write a Java program to append the specified element to the end of a hash set.
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2. Write a Java program to iterate through all elements in a hash list.
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3. Write a Java program to get the number of elements in a hash set.
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4. Write a Java program to empty an hash set.
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5. Write a Java program to test if a hash set is empty or not.
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6. Write a Java program to clone a hash set to another hash set.
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7. Write a Java program to convert a hash set to an array.
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8. Write a Java program to convert a hash set to a tree set.
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9. Write a Java program to find numbers less than 7 in a tree set.
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10. Write a Java program to compare two hash set.
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11. Write a Java program to compare two sets and retain elements that are the same.
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12. Write a Java program to remove all elements from a hash set.
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