docs.oracle.com/en/java/javase/15/docs/api/java.base/java/util/Scanner.html#hasNextInt() Scanner (Java SE 15 & JDK 15) All Implemented Interfaces: Closeable, AutoCloseable, Iterator public final class Scanner extends Object implements Iterator , Closeable A simple text scanner which can parse primitive types and strings using regular expressions. A Scanner breaks its input docs.oracle.com java.u..