recursiondemo2.java

本压缩文件中含有线程的控制

package c11;

import java.util.*;

public class RecursionDemo2 {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Scanner keyboard = new Scanner(System.in);
		System.out.print("Enter a nonnegative number> ");
		int number = keyboard.nextInt();
		
		System.out.println(number + " contains " + numberOfZeros(number)
				+ " zeros.");

	}
	
	public static int numberOfZeros(int n){
		if(n == 0){
			return 1;
		}else if (n < 10){
			return 0;
		}else if (n%10 == 0){
			return (numberOfZeros(n/10) + 1);
		}else
			return numberOfZeros(n/10);
		
	}

}