Homework8

import java.io.*;

public class Counter

{

private int count;

public void readInput() throws IOException

{boolean tryAgain = true;

BufferedReader keyboard = new BufferedReader(new InputStreamReader(System. in));

System.out.println("Enter a number.");

while (tryAgain)

{String count1 = keyboard.readLine();

count = Integer.parseInt(count1);

if (count >= 0)tryAgain = false;

elseSystem.out.println("Illegal date. Reenter input.");}}

public void reset(){count=0;}

public void inc(){count=count+1;

}public void dec(){count=count-1;

}public void output(){System.out.println(count);}}

====================================

public class Demo{

public static void main(String[] args) throws IOException {

Counter counter= new Counter();

counter.readInput();counter.inc();

counter.output();

counter.inc();counter.output();

counter.dec();

counter.output();

counter.reset();counter.output();}}