InputMismatchException – when the input does not match with the expected type Scanner nextLine() example using System.in.NoSuchElementException – when there is no token found.IllelgalStateException – when we attempt to perform search operation on closed scanner object.Java Scanner class throws the below exceptions while trying to read input: Returns a word boolean hasNext(Pattern pattern) Returns true if the next token matches the pattern specified boolean hasNextBigDecimal() Returns true if the next token has a BigDecimal boolean HasNextBigInteger() Returns true if the next token has BigInteger boolean hasNextBigInt() Returns true if the next token is BigInt boolean HasNextBoolean() Returns true if the next token is boolean boolean hasNextFloat() Returns true if the next token is Floatīoolean hasNextDouble() Returns true if the next token is Double boolean hasNextLine() Returns true if the scanner has another input line String next() Finds and returns the next complete token in the input BigDecimal nextBigDecimal() Returns the BigDecimal value from the input BigInteger nextBigInteger() Returns the next BigInteger value from the input Double nextDouble() Returns the next Double value from the input Float nextFloat() Returns the next Float value from the input Int nextInt() Returns the next int from the input Long nextLong() Returns the next long value from the input String nextLine() Returns the next line from the input string Short nextShort() Returns the next short value from the input string Java Scanner Exception We can use the below methods to read different input types and other manipulations Method Description void close() Closes the scanner object Pattern delimiter() Returns the Pattern of the scanner object that it currently uses to match delimiter boolean hasNext() Returns true if there is another token in the input string. Scanner sc3 = new Scanner(String s) Scanner Methods to read different input types The 2nd object sc1 reads input from a file and the 3rd object sc2 reads input from a string. The 1st object sc reads input data from user input which can be through the keyboard. The below code shows you how to create a scanner object with different input streams. To use the Java Scanner class, we import the package. In this case, it divides the string into 4 tokens “My”, “age”, “is”, “22” which uses space as a delimiter. For example, consider the below input string String s = "My age is 22" It then iterates through each token which is nothing but each data using its in-built methods. The scanner object reads the input and divides it into tokens based on a delimiter which is normally white space. Java Scanner next() example using String input.Java Scanner nextInt() example using System.in.Scanner nextLine() example using System.in.Scanner Methods to read different input types.Let's suppose that K is equal to two and the strength of two is two lengths. We need to consider the borders of the international police force. We need to involve at least one from K to 65,535. We need to count all the possibilities of different lengths of strength for the name of the variables if we want to count all the possibilities. There are 64 characters for our strength. For a java string, we have 64 characters. We have one symbol of dollar, one symbol of underscore, and 10 digits. We have 26 possible answers for upper case letters. Yes, right? For the name of the variables, we can put on all the possible characters. It's important to count all the possible outcomes. The point is that we have all of the possible symbols for the characters of the strength. We need to count how many possibilities we have for variables in java. Lowercase letters, the dollar symbol, the underscore symbol and the digits can be found in these variables. There are german language variables that have lengths between one and 65,535. The variables that are involved in the job language need to be considered for this exercise.
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