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Java inputstream reader

3 replies on 1 page. Most recent reply: Aug 26, 2003 8:02 AM by Senthoorkumaran Punniamoorthy

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Flat View: This topic has 3 replies on 1 page

karthik

Posts: 2
Nickname: karymov
Registered: Aug, 2003

Java inputstream reader

Posted: Aug 26, 2003 3:51 AM

I am new to java.
I have a project in which I run a thread which wakes up every 25 millisecs checks for user input and if the enter key is pressed the program quits.
I am trying to use inputstream reader functions coz thats what we are expected to use.
I am unable to run my program as I cannot get the read keyboard input and compare it to /n.
cud someone help me.

Senthoorkumaran Punniamoorthy

Posts: 335
Nickname: senthoor
Registered: Mar, 2002

Re: Java inputstream reader

Posted: Aug 26, 2003 4:37 AM

I suppose you are reading in the Keyboard input character by character. If so you can get the ascii value and check whether its equal to 13 because new line char is always 13.

If you can paste your code here might be able to help better.

karthik

Posts: 2
Nickname: karymov
Registered: Aug, 2003

Re: Java inputstream reader

Posted: Aug 26, 2003 5:51 AM

Hi
Here is the code

import java.io.*;
import java.io.IOException;

class KeyMonitor extends Thread
{
private InputStreamReader in;
private int name ;
private Server myServer;
private boolean running =true;
private int sleeptime = 25;
int ininit;
char inchar;

public KeyMonitor(Object someServer)
{

try
{ sleep(sleeptime);
in = new InputStreamReader(System.in.read());
char inchar = (char) in;

}
catch(InterruptedException e) {System.out.println("Quitting Program");}

}

public void run()
{
while (running == true)
{
try
{

}
catch(IOException ioe) { }
}
}
}

}
the whole point is I am a newbie in java and not clear how to make the thread wake up every 25 secs and check for enter.
I have to use this code snippet that is a constraint for the assignment.

Senthoorkumaran Punniamoorthy

Posts: 335
Nickname: senthoor
Registered: Mar, 2002

Re: Java inputstream reader

Posted: Aug 26, 2003 8:02 AM

in = new InputStreamReader(System.in.read()); 
char inchar = (char) in;

What you are trying to case in which is an InputStreamReader to a char which is not possible. You might have to a loop to read the data.

    try {
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        String str = "";
        while (str != null) {
            System.out.print("> prompt ");
            str = in.readLine();
            process(str);
        }
    } catch (IOException e) {
    }

If you are new to java I think the site below will be really useful.

http://www.javaalmanac.com/

and the example code I have pasted below comes from the link

http://www.javaalmanac.com/egs/java.io/ReadFromStdIn.html

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