Web Reference: Nov 27, 2025 · Learn about the reference and value equality checks in Java, the differences between them, and understand when to use which check. Jan 4, 2025 · The main difference is that string equals () method compares the content equality of two strings while the == operator compares the reference or memory location of objects in a heap, whether they point to the same location or not. If both arguments are arrays, the algorithm in Arrays.deepEquals is used to determine equality. Otherwise, equality is determined by using the equals method of the first argument.
YouTube Excerpt: explains why == doesn't always work like you'd expect, and how to override .equals.
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