How deeply does 100 Java Mistakes and How to Avoid Them cover boundary check?

Explains empty inputs, ordering errors, reversed comparisons, off-by-one errors, range constraints, and standard library checks.

Boundary check

As explained in 100 Java Mistakes and How to Avoid Them

A bounds check is a validation that an index or indexed range lies within the permitted limits of a data structure.

Bounds checking validates that an index or indexed range lies within a data structure’s permitted limits. Java prevents out-of-range access with exceptions, but explicit checks still prevent empty-input failures, incorrect behavior, data corruption, and security holes. section 5.2

Avoid these common checking mistakes:

Accessing an element before checking its index, such as calling charAt(0) on a possibly empty string. section 5.2

Prefer standard range checks

Custom array- and collection-like APIs can use Objects.checkIndex, Objects.checkFromToIndex, and Objects.checkFromIndexSize before accessing elements or ranges.

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Related concepts

out-of-bounds array accessaddresses · An out-of-bounds array access is an operation that reads or writes an element or memory location outside the valid range of an array or associated object.
GPU kernelused by · A GPU kernel is an executable program or function that performs computation on a graphics processing unit, commonly using parallel threads.
strideuses · A stride is the step interval between successive positions or elements accessed, selected, or processed along a dimension or sequence.
indexingused by · Indexing is the organization or use of positions, keys, or lookup structures to identify and retrieve selected data or elements.

This explainer was generated by Manning's knowledge graph from the text of 100 Java Mistakes and How to Avoid Them. The section links point to the parts of the book it draws on.