\n For programming beginners and aspiring developers, arrays and lists are fundamental data structures. Understanding these two data structures is crucial for achieving excellent performance in various coding test problems. In this article, we will solve an algorithm problem using arrays and lists in Java.\n <\/p>\n
\nProblem:<\/strong> Write a method that removes duplicate elements from a given integer array and returns the remaining elements sorted. The result array should be sorted in ascending order, and duplicate values should be removed.\n <\/p>\n \nInput:<\/strong> [3, 1, 2, 3, 4, 2, 1] \n To solve this problem, we will follow these steps:\n <\/p>\n \n Now, let\u2019s write the Java code based on the above approach.\n <\/p>\n \n The above code defines a method called \n The time complexity of this algorithm is as follows:\n <\/p>\n \n Therefore, the overall time complexity is O(n + m log m)<\/strong>.\n <\/p>\n \n In this tutorial, we implemented a duplicate removal and sorting algorithm using arrays and lists in Java. Through each step, we understood how basic data structures work and learned how to improve our skills. I hope you gain more experience by solving various algorithm problems in the future.\n <\/p>\nProblem Summary<\/h3>\n
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3. Example<\/h2>\n
\nOutput:<\/strong> [1, 2, 3, 4]\n <\/p>\n4. Approach<\/h2>\n
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5. Code Implementation<\/h2>\n
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\nimport java.util.Arrays;\nimport java.util.HashSet;\n\npublic class RemoveDuplicatesAndSort {\n\n public static int[] removeDuplicatesAndSort(int[] arr) {\n \/\/ Use HashSet to remove duplicates\n HashSetCode Explanation<\/h3>\n
removeDuplicatesAndSort<\/code>. This method removes duplicate elements from the input array and returns a sorted array.\n <\/p>\n\n
HashSet<\/code> to easily remove duplicate integers.<\/li>\nHashSet<\/code> into a new array.<\/li>\nArrays.sort<\/code> to sort the array.<\/li>\n<\/ul>\n6. Complexity Analysis<\/h2>\n
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n<\/code> is the size of the input array.<\/li>\nm<\/code> is the size of the array after duplicates have been removed.<\/li>\n<\/ul>\n7. Conclusion<\/h2>\n
References<\/h3>\n