Write a Java program to read 10 records in the format roll-score, store only the highest score for each roll number using a HashMap, and print the records sorted in descending order of score.

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Anonymous · Accepted Answer

I used Java HashMap to store the highest score for each roll number. Then I converted the HashMap entries into an ArrayList, sorted them in descending order using Collections.sort() with a custom comparator, and printed the final output.

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