Java实验四接口educoder

最新推荐文章于 2024-05-20 22:32:18 发布

原创最新推荐文章于 2024-05-20 22:32:18 发布 · 1k 阅读

8 ·

CC 4.0 BY-SA版权

文章标签：

#java #接口

Java 专栏收录该内容

5 篇文章

订阅专栏

这篇博客介绍了如何在Java中定义和实现Animal接口，包括Dog、Centipede、People及其子类Chinese和Britisher。同时，定义了MyList接口并实现了两个不同的列表类：MyObjectArray和MyDoubleArray，它们使用数组来存储元素并提供了添加、获取、清空、检查空性和获取容量等操作。

接口练习

Animal.java

package step2;
//定义Animal接口
public interface Animal{
    public void Speak();
    public void Walk();
    public String toString();
}

Centipede.java

package step2;
//完成Centipede类
public class Centipede implements Animal{
    public void Speak(){
        System.out.println("不发声");
    }
    public void Walk(){
        System.out.println("不知道有多少条腿走路");
    }
    public String toString(){
        return "蜈蚣";
    }
}

Dog.java

``package step2;
//完成Dog类
class Dog implements Animal{
   public  void Speak(){
        System.out.println("发声");
    }
   public void Walk(){
       System.out.println("四条腿走路");
   }
  public  String toString (){
       return "狗";
   }
}

People.java

package step2;
//完成People类
class People implements Animal{
    public void Speak(){
        System.out.println("发声");
    }
   public  void Walk(){
        System.out.println("两条腿走路");
    }
   public  String toString(){
        return "人";
    }
}

Chinese.java

package step2;
//完成Chinese类
class Chinese extends People{
   public  String toString(){
        return "中国人";
    }
}

Britisher.java

package step2;
//完成Britisher类
class Britisher extends People{
    public String toString(){
        return "英国人";
    }
}

定义一个MyList接口，并使用数组的方法来实现接口

MyList

package step1;
//在此写接口MyList
public interface MyList{
       public void add(Object obj);
       public   Object get(int index);
       public void clear();
       public boolean isEmpty();
       public  int size();
       public int capacity();
}

MyObjectArray

package step1;
import java.util.Arrays;
//在此写MyObjectArray类
public class MyObjectArray implements MyList{
    private Object[] Array = null;
    private int c = 0;
    private int incSize;
    public  MyObjectArray(){

    }
   public  MyObjectArray(int incSize){
       if(incSize <0)
          this.incSize = 5;
        else
            this.incSize = incSize;
        this.Array = new Object[this.incSize];
    }
public void add(Object obj){
    if(this.c==Array.length)
        Array = Arrays.copyOf(Array,Array.length+incSize);
    Array[c]=obj;
    c++;
}
public Object get(int index){
    Object obj = null;
    if(index>0&&index<c)
        obj= Array[index];
    return obj;    
}
public boolean isEmpty(){
    if(Array[0]==null)
        return true;
    else    
        return false;
}
public int size(){
    return c;
}
public int capacity()
{
    return this.Array.length;
}
public void clear(){
    this.Array = new Object[5];
    this.c = 0;
}
}

MyDoubleArray

package step1;
import java.util.Arrays;
//在此写MyDoubleArray类
public class MyDoubleArray implements MyList{
    private Object[] Array = null;
    private int c = 0;
    private int incSize;
    public  MyDoubleArray(){

    }
   public  MyDoubleArray(int initSize){
       if(initSize <0)
          this.incSize = 10;
        else
            this.incSize = initSize;
        this.Array = new Object[this.incSize];
    }
public void add(Object obj){
    if(c==Array.length)
        Array = Arrays.copyOf(Array,2*Array.length);
    Array[c]=obj;
    this.c++;
}
public Object get(int index){
    Object obj = null;
    if(index>0&&index<c)
        obj= Array[index];
    return obj;    
}
public boolean isEmpty(){
    if(Array[0]==null)
        return true;
    else    
        return false;
}
public int size(){
    return c;
}
public int capacity()
{
    return this.Array.length;
}
public void clear(){
    this.Array = new Object[10];
    this.c = 0;
}
}

仅供自己的学习记录和参考