在Bash中管道输入到Java程序

I have a java program:

我有一个java程序:

public class ProcessMain {
    public static final void main(String[] args) throws Exception {        

        Scanner keyboard = new Scanner(System.in);
        boolean exit = false;
            do
            {   if(keyboard.hasNext()){
                    String input = keyboard.next();
                    System.out.println(input);
                    if( "abort".equals(input)){
                    ABORT();
                    exit = true;
                    }
                }else{
                    System.out.println("Nothing");
                    try {
                        Thread.sleep(5000);
                    } catch (InterruptedException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }
            }while (!exit);
        }

    private static void ABORT(){
        System.out.println("ABORT!!!!");
    }
}
public c