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  Tutorial: Summary - Scanner

The main use of java.util.Scanner is to read values from System.in or a file.

Tutorial Details:

The main use of java.util.Scanner is to read values from System.in or a file.

Many Scanner methods fit a simple pattern: nextXYZ() scans and returns a value of type XYZ. hasNextXYZ() returns true if something of type XYZ is available to be read next.

Additional types. The summary below just shows methods for ints and doubles because these are most common, but Scanner also supports BigDecimal, BigInteger, Float (returns float), Boolean (returns boolean), Long (returns long), Short (returns short), and Byte (returns byte). The XYZ in the prototypes below stands of for one of these additional types.


 

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