Java Coding Problems

184. Matching elements in a stream

To match certain elements in a Stream, we can rely on the following methods:

• anyMatch()
• noneMatch()
• allMatch()

All of these methods take a Predicate as an argument and fetch a boolean result against it.

These three operations rely on the short-circuiting technique. In other words, these methods may return until we process the entire stream. For example, if allMatch() matches false (evaluates the given Predicate as false), then there is no reason to continue. The final result is false.

Let's assume that we have the following list wrapped in a stream:

List<String> melons = Arrays.asList(  "Gac", "Cantaloupe", "Hemi", "Gac", "Gac", "Hemi",     "Cantaloupe", "Horned", "Hemi", "Hemi");

Now, let's try to answer ...