throw and throws in Java

throw and throws in Java — a practical guide to Java throw throws with clear examples you can reuse in real projects.

Java Tutorial Series (48/90). Prefer one article? Read the complete Java tutorial.

Short description

`throw` creates/raises an exception. `throws` advertises checked exceptions a method may pass to callers.

throw/throws

static int parse(String s) throws NumberFormatException {
    if (s == null) throw new IllegalArgumentException("null");
    return Integer.parseInt(s);
}