Java - 如果按下空格键，则记录

Question

我想记录是否按了空格键。看起来应该是这样的：

    public static void main(String[] args) {

    for (int i = 1; i < 100; i++) {

        if(space is pressed){               //asks if key is pressed
            System.out.println("1");
        }else {
            System.out.println("0");
        }

        try {
        Thread.sleep(5000);                 //5000 milliseconds delay
        } catch(InterruptedException ex) {
        Thread.currentThread().interrupt();
        }
    }
    }