自定义实现Map类

package text;

public class SxtMap001{
    SxtEntry[] arr = new SxtEntry[990];
    int size;
    public void put(Object key,Object value){
        SxtEntry e = new SxtEntry(key,value);
        arr[size++]=e;//放入数组中
    }
    
    public Object get(Object key){
        for(int i=0;i<size;i++){
            if(arr[i].key.equals(key)){
                return arr[i].value;
            }
        }
        return null;
    }
    public boolean containsKey(Object key){
        for(int i=0;i<size;i++){
            if(arr[i].key.equals(key)){
                return true;
            }
        }
        return false;
    }
    
    public boolean containsvalue(Object value){
        for(int i=0;i<size;i++){
            if(arr[i].value.equals(value)){
                return true;
            }
        }
        return false;
    }
    public void  putAll(SxtMap001 T){
        for(int i=0;i<T.size;i++){
            System.out.println(arr[i].key+":"+((Wife)arr[i].value).name);
        }
    }
    
    
    public static void main(String[] args){
        SxtMap001 m = new SxtMap001();
        m.put("张三",new Wife("杨幂"));//Wife请参考上一篇，其实就是一个用来创建对象的类
        m.put("张三",new Wife("李四"));
        Wife w=(Wife) m.get("张三");
        System.out.println(w.name);
        Object M="李四";
        System.out.println(m.containsKey("张三"));
        System.out.println(m.containsvalue("李四"));
        m.putAll(m);
        
        
    }
}
class SxtEntry{
    Object key;
    Object value;
    
    public SxtEntry(Object key,Object value){
        super();
        this.key=key;
        this.value=value;
    }
}

运行结果：
杨幂
true
false
张三:杨幂
张三:李四