Keyboard input/Obtain a Y or N response: Difference between revisions
Keyboard input/Obtain a Y or N response (view source)
Revision as of 11:55, 2 August 2023
, 9 months agoNew post.
(Keyboard input/Obtain a Y or N response in True BASIC) |
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return ch == 'y' or 'Y';
]; -).</syntaxhighlight>
=={{header|Java}}==
The task specification that there should be no need for the user to press the enter key,
creates an awkward situation for the Java language.
However, a short program that waits for the user to press return can easily be constructed.
<syntaxhighlight lang="java">
import java.awt.event.KeyEvent;
import java.io.IOException;
import java.awt.EventQueue;
import java.awt.event.KeyAdapter;
import javax.swing.JFrame;
public final class KeyboardInputObtainYOrN {
public static void main(String[] aArgs) {
EventQueue.invokeLater( () -> { new Test("Obtain Y or N"); } );
}
}
final class Test extends JFrame {
public Test(String aTitle) {
super(aTitle);
addKeyListener( new YesOrNoKeyAdapter() );
setVisible(true);
try {
while ( System.in.available() > 0 ) {
System.in.read();
}
} catch (IOException ioe) {
ioe.printStackTrace();
}
System.out.println("Do you want to quit the program? Y / N");
}
}
final class YesOrNoKeyAdapter extends KeyAdapter {
@Override
public void keyPressed(KeyEvent aKeyEvent) {
if ( aKeyEvent.getKeyCode() == KeyEvent.VK_Y ) {
System.out.println("Y was pressed, quitting the program");
Runtime.getRuntime().exit(0);
} else if ( aKeyEvent.getKeyCode() == KeyEvent.VK_N ) {
System.out.println("N was pressed, but the program is about to end anyway");
Runtime.getRuntime().exit(0);
} else {
System.out.println("Please try again, only Y or N are acceptable");
}
}
}
</syntaxhighlight>
=={{header|JavaScript}}==
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