How to Correctly Identify Duplicates in a Java Array?

Java Array, Finding Duplicates

Your code doesn't work correctly as it sets duplicates to true when it finds a duplicate. However, it also sets duplicates to true when it compares an element with itself (zipcodeList[k] == zipcodeList[j] when j == k), which is not a duplicate.

To fix this, you need to modify the condition, so it checks if j != k before setting duplicates to true. Here's the corrected code:

duplicates = false;
for(j = 0; j < zipcodeList.length; j++){
    for(k = 0; k < zipcodeList.length; k++){
        if (j != k &amp;&amp; zipcodeList[k] == zipcodeList[j]){
            duplicates = true;
        }
    }
}

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