The
nextLong(radix) method of
java.util.Scanner class scans the next token of the input as a long. If the translation is successful, the scanner advances past the input that matched. If the parameter radix is not passed, then it behaves similarly as nextLong(radix) where the radix is assumed to be the default radix.
Syntax:
public long nextLong()
Parameters: The function accepts a parameter
radix which is used to interpret the token as a long value.
Return Value: This function returns the long scanned from the input.
Exceptions: The function throws three exceptions as described below:
- InputMismatchException: if the next token does not matches the Integer regular expression, or is out of range
- NoSuchElementException: throws if input is exhausted
- IllegalStateException: throws if this scanner is closed
Below programs illustrate the above function:
Program 1:
Output:
Not found Long value :Gfg
Found Long value :9
Not found Long value :+
Found Long value :6
Not found Long value :=
Not found Long value :12.0
Program 2:
Output:
Not found Long value :Gfg
Found Long value :9
Not found Long value :+
Found Long value :6
Not found Long value :=
Not found Long value :12.0
Program 3: To demonstrate InputMismatchException
Output:
Exception thrown: java.util.InputMismatchException
Program 4: To demonstrate NoSuchElementException
Output:
Not found Long value :Gfg
Exception thrown: java.util.NoSuchElementException
Program 5: To demonstrate IllegalStateException
