all methods of scanner class in java

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the `scanner` class in java is part of the `java.util` package and is primarily used to parse primitive types and strings using regular expressions. it can read input from various sources, including keyboard input (system.in), files, and strings.

here is an informative tutorial on the common methods of the `scanner` class, along with code examples for each method.

importing the scanner class

before using the `scanner`, you need to import it:



creating a scanner object

you can create a `scanner` object to read input from different sources:



common methods of the scanner class

1. *next()*
reads the next token from the input as a `string`.
example:


2. *nextline()*
reads an entire line of input as a `string`.
example:


3. *nextint()*
scans the next token of the input as an `int`.
example:


4. *nextdouble()*
scans the next token of the input as a `double`.
example:


5. *nextboolean()*
scans the next token of the input as a `boolean`.
example:


6. *hasnext()*
returns true if there is another token in the input.
example:


7. *hasnextint()*
returns true if the next token can be interpreted as an `int`.
example:


8. *hasnextdouble()*
returns true if the next token can be interpreted as a `double`.
example:


9. *close()*
closes the scanner and releases any resources associated with it.
example:


example program

here’s a simple program that demonstrates the usage of the `scanner` class:



conclusion

the `scanner` class is a powerful tool for reading input in java. it provides various methods to read different types of data easily, handling both simple and complex input parsing. always remember to close the scanner to prevent resource leaks.

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