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Manual array to collection copy

Reports code that uses a loop to copy the contents of an array into a collection.

A shorter and potentially faster (depending on the collection implementation) way to do this is using Collection.addAll(Arrays.asList()) or Collections.addAll().

Only loops without additional statements inside are reported.

Example:

void addAll(List<String> list, String[] arr) { for (int i = 0; i < arr.length; i++) { String s = arr[i]; list.add(s); } }

After the quick-fix is applied:

void addAll(List<String> list, String[] arr) { Collections.addAll(list, arr); }

Inspection Details

By default bundled with:

IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,

Can be installed with plugin:

Java, 241.16690

Last modified: 29 April 2024