Question: Java question Given an array of integers, return true if each element in the array appears exactly twice. eachTwice ([1, 1, 2, 2, 3, 3])

Java question

Given an array of integers, return true if each element in the array appears exactly twice. eachTwice ([1, 1, 2, 2, 3, 3]) rightarrow true eachTwice ([1, 2, 3, 3, 2, 1]) rightarrow true eachTwice([3, 1, 4, 1, 3, 5, 4]) rightarrow false

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