How to Read a Single Character from the Keyboard Using Java Scanner?

How to Capture Character Input Using Java Scanner

Seeking a char input from the keyboard, a commonly attempted solution involves using reader.nextChar(). However, this method is not present in the Java Scanner library.

Solution

To explicitly capture a char input, you can employ one of the following approaches:

1. Extract First Character from String Input:

char c = reader.next().charAt(0);

This method utilizes reader.next() to read a String, then extracts the first character using charAt(0). It's a convenient option in most cases.

2. Consume Exactly One Character:

char c = reader.findInLine(".").charAt(0);

reader.findInLine(".") reads and consumes a character matching the specified pattern (in this case, any character). It ensures that exactly one character is consumed.

3. Consume Strictly One Character:

char c = reader.next(".").charAt(0);

reader.next(".") reads and consumes a character matching the specified pattern, but throws an exception if more than one character is entered. This option strictly ensures that only one character is consumed.

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