The Scanner class is a class in java.util, which allows the user to give an input of various types. Which Scanner options do you have in Java?
There are two constructors:
- Scanner in = new Scanner(System.in); This is used when the program wants an input from the user.
- Scanner inFile = new Scanner(new FileReader(“myFile”)); This is used when the input could found in a file.
The following methods exist in the Scanner class:
|
Method |
Returns |
|
.nextInt() |
Returns the next token as an int. |
|
.nextLong() |
Returns the next token as a double. |
|
.nextFloat() |
Returns the next token as a float. |
|
.nextDouble() |
Returns the next token as a double. |
|
.next() |
Returns the next token as a String. |
|
.nextLine() |
Returns a whole line as String. |
|
.close() |
Closes the scanner. |
Click here to find out when do you have to use the scanner.
Click here for different methods in the scanner class.