Scanner method to get a char

Question

What is the Scanner method to get a char returned by the keyboard in Java    like nextLine   for String  nextInt   for int  etc

User · Answer

You can use the Console API  which made its appearance in Java 6  as follows   Console cons   System console    if cons    null      char c    char  cons reader   read        Checking for EOF omitted           If you just need a single line you don t even need to go through the reader object   String s   cons readLine

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Java s Scanner class does not have a built in method to read from a Scanner character-by-character   http   java sun com javase 6 docs api java util Scanner html  However  it should still be possible to fetch individual characters from the Scanner as follows   Scanner sc   char c   sc findInLine      charAt 0     And you could use it to fetch each character in your scanner like this   while sc hasNext         char c   sc findInLine      charAt 0       System out println c     to print out every char in the scanner     The findInLine   method searches through your scanner and returns the first String that matches the regular expression you give it

User · Answer

sc next   charat 0          is the method of entering character by user based on the number entered at the run time  example  sc next   charat 2 ------------

User · Answer

To get a char from a Scanner  you can use the findInLine method       Scanner sc   new Scanner  abc        char ch   sc findInLine      charAt 0       System out println ch      prints  a      System out println sc next        prints  bc    If you need a bunch of char from a Scanner  then it may be more convenient to  perhaps temporarily  change the delimiter to the empty string  This will make next   returns a length-1 string every time       Scanner sc   new Scanner  abc        sc useDelimiter          while  sc hasNext              System out println sc next              prints  a    b    c

User · Answer

Console cons   System console      The above code line creates cons as a null reference  The code and output are given below   Console cons   System console    if  cons    null        System out println  Enter single character          char c    char  cons reader   read        System out println c    else      System out println cons       Output       null   The code was tested on macbook pro with java version  1 6 0 37

User · Answer

Scanner sc   new Scanner  System in  char c   sc next   trim   charAt 0

[java] Scanner method to get a char

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