package learn.java.cn.collection;
public class MyMap {
int size=0;
DefMap [] defMap=new DefMap[999];
public void put(Object key,Object value)
{ //判断是否健值 相等,若是相等,则替换
for(int i=0; i<=size;i++)
{
if (defMap[i]!=null && defMap[i].key.equals(key))
{
defMap[i].value=value;
return ;
}
}
defMap[size++]=new DefMap(key,value);
}
public Object get (Object key)
{
for(int i=0;i<size;i++)
{
if (defMap[i].key.equals(key))
return defMap[i].value;
}
return null;
}
public DefMap [] remove(Object key)
{
for(int i=0;i<size;i++)
{
if (defMap[i].key.equals(key))
{
for (;i<=size-2;i++)
{
defMap[i]=defMap[i+1];
}
defMap[size-1]=null;
return defMap;
}
}
return null;
}
public int size()
{ int i;
for ( i=0;i<size;i++)
{
if (defMap[i]==null)
break;
}
return i;
}
public static void main(String args[])
{
MyMap Map=new MyMap();
Map.put("王尚权", "小静");
Map.put("目中", "杨幂");
// Map.put("王尚权", "赵丽颖");
Map.put("张山","李四");
System.out.println(Map.get("王尚权"));
System.out.println(Map.get(new String("王尚权")));//新建不同的对象,
//但是equals()比较的是内容返回的是一致的
// System.out.println(Map.defMap[1].value);
System.out.println(Map.get("张山"));
System.out.println(Map.size());
Map.remove("王尚权");
System.out.println(Map.defMap[0].value);
System.out.println(Map.size());
}
}
class DefMap
{
Object key;
Object value;
public DefMap(Object key,Object value)
{
this.key=key;
this.value=value;
}
}
Java之Map实现初级版
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转载自blog.csdn.net/qq_38662930/article/details/84135856
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