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Any Key problem in a Java App.

Posted on 1998-11-21
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Last Modified: 2010-03-30
How can I capture a character from the user's key press without the user having to press the 'enter' key. Similar to the getch function in Turing.

This question was asked, but wasn't correctly solved.

// suggested on expert net
char ch;
ch = System.in.read();

still needs the return key to be pressed.

Nobody seems to know this.. and it seems so simple.
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Question by:tin_pham
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3 Comments
 
LVL 27

Expert Comment

by:BigRat
ID: 1227992
This is perfectly correct. It assume that you are inconsole context and here the InputStream in is buffered meaning that the Return key must be pressed.
   In which context do you want a solution? Concole context or have you some GUI on the screen?
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Accepted Solution

by:
revferret earned 100 total points
ID: 1227993
You can implement the java.awt.event.KeyListener class.

This class has 3 methods:
public void keyPressed(java.awt.event.KeyEvent kevent);
public void keyTyped(java.awt.event.KeyEvent kevent);
public void keyReleased(java.awt.eventKeyEvent kevent);

This is how I do it and it seems to work.
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Author Comment

by:tin_pham
ID: 1227994
Thanks to everybody who attempted to solve this. I've come to the conclusion that it's not possible because of the way Java reads the input stream.

I cannot use the AWT because this is a java Application not an Applet.


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