第三次JAVA作业

package JavaPractice; 
 class Monkey {
          private String s; 
          public Monkey() { } 
          public Monkey(String s) 
             { 
                this.s=s; 
              } 
          public String getS() 
              { 
                 return s; 
               } 
          public void speak() 
               { 
                 System.out.println("咿咿呀呀......"); 
               } 
} 
           class People extends Monkey 
              { 
                 public void speak() 
                          {
                              System.out.println("小样的，不错嘛！会说话了！"); 
                           } 
                public void think() 
                           { 
                              System.out.println("别说话！认真思考！"); 
                            } 
               } 
           public class E 
               { 
                  public static void main(String[] args)
                            { 
                               Monkey m=new Monkey(); 
                                People p=new People(); 
                               m.speak(); 
                                p.speak(); 
                                 p.think(); 
                              } 
                  }