java新人问题，javac使用提示找不到符号是怎么回事？

package com.abcdefg.kkk;

public class Doll {

	/** 福娃的名字 */

	private String name;

	/** 构造方法 */

	public Doll(String nameString) {

		this.name=nameString;

	}

	/** 说话 */

	public void speak() {

		System.out.println(name);	

	}

}

package com.abcdefg.kkk;

public class AppMain {

	public static void main(String args[]) {

		Doll beibei = new Doll("贝贝");

		Doll jingjing = new Doll("晶晶");

		Doll huanhuan = new Doll("欢欢");

		Doll yingying = new Doll("迎迎");

		Doll nini = new Doll("你你");

		beibei.speak();

		jingjing.speak();

		huanhuan.speak();

		yingying.speak();

		nini.speak();

	}

}