Java Array Traversal: Using the for-each Loop to Easily Iterate Array Elements

This article introduces the for-each loop (enhanced for loop) for array traversal in Java, which is a concise way to iterate over arrays storing elements of the same type. The syntax is "dataType tempVar : arrayName", where the tempVar directly accesses elements without needing an index. It has obvious advantages: concise code (no index or out-of-bounds checks needed), high security (no out-of-bounds errors), and intuitive logic (directly processes elements). Compared to the traditional for loop, which requires maintaining an index, for-each is more suitable for "reading" elements (e.g., printing). However, if you need to modify elements or use indices (e.g., calculating positional relationships), the traditional for loop is necessary. Note: The tempVar in for-each is a copy of the element; modifying it does not affect the original array. To modify elements, use the traditional for loop. In summary, use for-each for read-only arrays, and the traditional for loop when modification or index usage is required.