Reading a single char in Java

Question

How can a char be entered in Java from keyboard?

Answer 1

You can use a Scanner for this. It's not clear what your exact requirements are, but here's an example that should be illustrative:

    Scanner sc = new Scanner(System.in).useDelimiter("\\s*");
    while (!sc.hasNext("z")) {
        char ch = sc.next().charAt(0);
        System.out.print("[" + ch + "] ");
    }

If you give this input:

123 a b c x   y   z

The output is:

[1] [2] [3] [a] [b] [c] [x] [y] 

So what happens here is that the Scanner uses \s* as delimiter, which is the regex for "zero or more whitespace characters". This skips spaces etc in the input, so you only get non-whitespace characters, one at a time.