Java 输入时间限制

Question

假设我有一个代码，要求用户提供一些输入，例如：

for (condition) {
System.out.println("Please give some input");
System.in.read();
} //lets say this loop repeats 3 times and i face a problem during second iteration

但是我想给用户60秒的时间限制，然后抛出一个异常（在这种情况下，我认为是TimeOutException）。我怎么做？

Answer 1

import java.util.Timer;
import java.util.TimerTask;
import java.io.*;
public class test
{
    private String str = "";

    TimerTask task = new TimerTask()
    {
        public void run()
        {
            if( str.equals("") )
            {
                System.out.println( "you input nothing. exit..." );
                System.exit( 0 );
            }
        }    
    };

    public void getInput() throws Exception
    {
        Timer timer = new Timer();
        timer.schedule( task, 10*1000 );

        System.out.println( "Input a string within 10 seconds: " );
        BufferedReader in = new BufferedReader(
        new InputStreamReader( System.in ) );
        str = in.readLine();

        timer.cancel();
        System.out.println( "you have entered: "+ str ); 
    }

    public static void main( String[] args )
    {
        try
        {
            (new test()).getInput();
        }
        catch( Exception e )
        {
            System.out.println( e );
        }
        System.out.println( "main exit..." );
    }
}