i am trying to make a simple reaction test in java. when the screen turns green i press space witch is supposed to change te boolean "clicked into false and stop the loop that measures time. in reality the key listner does nothing. am i adding the keay listener to the right compnent( jpanel panel)? is there any other problems?
import java.awt.Color;
import java.awt.RenderingHints.Key;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.*;
public class mainCheck {
// //////////////////////////////////////
public static void timeKeeper() {
boolean clicked=false;
long time = 10000;
try {
Thread.sleep(5000);
} catch (InterruptedException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
panel.setBackground(Color.GREEN);
while (time > 0 && !clicked) {
try {
Thread.sleep(1);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
time--;
}
panel.setBackground(Color.gray);
long time2= 10000-time;
JLabel x = new JLabel("" +time2+"");
panel.add(x);
}
// //////////////////////////////////////
static boolean clicked;
JFrame frame;
static JPanel panel;
public mainCheck() {
frame = new JFrame();
panel = new JPanel();
clicked = false;
Handler handler = new Handler();
frame.addKeyListener(handler);
frame.add(panel);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(500,500);
frame.setVisible(true);
}
// //////////////////////////////////////
public static void main(String[] args) {
mainCheck f = new mainCheck();
panel.getActionMap();
f.timeKeeper();
}
// //////////////////////////////////////
public class Handler implements KeyListener {
@Override
public void keyPressed(KeyEvent e) {
// TODO Auto-generated method stub
}
@Override
public void keyReleased(KeyEvent e) {
// TODO Auto-generated method stub
}
@Override
public void keyTyped(KeyEvent e) {
// TODO Auto-generated method stub
if (e.getKeyCode() == KeyEvent.VK_SPACE) {
clicked = false;
System.out.println("space pressed");
}
}
}
}
And the last problem you have is in "timeKeeper()" you have to erase "boolean" because it is already declarated
This is the correct code: