CODEWITHSUNDEEP
javaconsolekeyasciilistener
space55
space55

Reputation: 65

Console-based Key Listener Java

I am trying to write a small text-based game in Java. I had previously written this in C++, but I used "getch()" in C++, and I have no idea what the java equivalent. I am fairly new, and so am not very experienced, but I am able to learn. Is there a Java equivalent to "getch()" in Java? It needs to return the ASCII value of the key. Ideas?

Upvotes: 2

Views: 11245

Answers (3)

Ankit Rustagi
Ankit Rustagi

Reputation: 5637

You could use a BufferedReader to replicate getch()

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class myclass 
{
    public static void main(String[] args) 
    {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        System.out.println("Press Enter to continue");
        try 
        {
            int ascii = br.read();
            System.out.println("ASCII Value - "+ascii);
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
    } 
}

Output

Enter any character to continue
<press a then hit Enter>
ASCII Value - 97

Upvotes: 3

Talandar
Talandar

Reputation: 116

You'll probably want to use 

InputStreamReader inStream = new InputStreamReader(System.in);
int charValue = inStream.read();

then switch on the character value from there.

As someone else mentioned, Java works on UTF-16, but for characters [a-zA-z0-9] and normal punctuation, you won't notice a difference.

Javadoc for the InputStreamReader: InputStreamReader Javadoc

Upvotes: 0

SteveP
SteveP

Reputation: 19093

In general, you read input from System.in. You can read from this stream in lots of ways, but one option is to use java.util.scanner.

Try something like:

import java.util.Scanner;

Scanner keyboard = new Scanner(System.in);
byte mybyte = keyboard.nextByte();

http://docs.oracle.com/javase/1.5.0/docs/api/java/util/Scanner.html

Upvotes: 0

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