如果地图中不存在密钥，我正在尝试将数据添加到我的哈希图中。出于某种原因，即使密钥确实存在，哈希映射也会添加它。我不知道为什么会这样。我的 addEntity 方法是问题所在。我正在尝试检测密钥是否已经在哈希图中，如果是，则什么也不做。但是，由于某种原因，它总是会添加密钥，无论密钥是否已经存在。
我的数据文件：
package timeTraveler.mechanics;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import net.minecraft.entity.EntityLiving;
public class PathingData
{
/**
* Entity data array
*/
public static Map<String[], List<int[]>> allEntityData;
public PathingData()
{
allEntityData = new HashMap<String[], List<int[]>>();
}
/**
* Adds an entity UUID (Unique ID)and MobType to the entity data ArrayList. If the entity already exists inside of the ArrayList, then it skips it.
* @param uuid
*/
public void addEntity(String[] entityData)
{
System.out.println(entityData[0]);
if(!allEntityData.containsKey(entityData))
{
System.out.println("Adding entity!");
allEntityData.put(entityData, new ArrayList<int[]>());
}
else
{
System.out.println("ENTITY ALREADY EXISTS IN ARRAY");
}
}
/**
* Adds data (X, Y, and Z) to the corresponding UUID (Unique ID) for the entity. If the entity's UUID does not exist, then it prints out a line that says the UUID cannot be found.
* @param uuid
* @param data
*/
public void addData(String[] entityData, String data)
{
System.out.println(entityData[0]);
if(allEntityData.containsKey(entityData))
{
System.out.println("Adding data to entity!");
int[] rawData = new int[3];
String[] pureData = data.split(",");
rawData[0] = Integer.parseInt(pureData[0]);
rawData[1] = Integer.parseInt(pureData[1]);
rawData[2] = Integer.parseInt(pureData[2]);
List<int[]> entityLocData = allEntityData.get(entityData);
entityLocData.add(rawData);
allEntityData.put(entityData, entityLocData);
}
else
{
System.out.println("ENTITY DOES NOT EXIST IN ARRAY! :(");
//addEntity(entityData);
}
}
/**
* Gets the data for a specific UUID (Unique ID) for an entity.
* @param uuid
* @return
*/
public List<int[]> getDataForUUID(String[] entityData)
{
List<int[]> entityLoc = allEntityData.get(entityData);
return entityLoc;
}
/**
* Clears all entities and their corresponding data from the map.
*/
public void clearAllEntitiesAndData()
{
allEntityData.clear();
}
/**
* Checks if entity exists inside of array
* @param uuid
* @return
*/
public boolean doesEntityExist(String[] entityData)
{
List<int[]> entityLoc = allEntityData.get(entityData);
if(entityData != null)
{
return true;
}
return false;
}
}
我已确保该变量只有一个实例，并且我总是在我的 .addEntity 和 .addData 中引用该变量。有任何想法吗？
编辑：我刚刚尝试实施提出的建议。但是，它仍然只是打印出相同的内容，使用 timetraveler.core.StringArrayHolder@0 而不是数组。这是修改后的代码：
package timeTraveler.mechanics;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import timeTraveler.core.StringArrayHolder;
import net.minecraft.entity.EntityLiving;
public class PathingData
{
/**
* Entity data array
*/
public static Map<StringArrayHolder, List<int[]>> allEntityData;
public PathingData()
{
allEntityData = new HashMap<StringArrayHolder, List<int[]>>();
}
/**
* Adds an entity UUID (Unique ID)and MobType to the entity data ArrayList. If the entity already exists inside of the ArrayList, then it skips it.
* @param uuid
*/
public void addEntity(StringArrayHolder entityData)
{
System.out.println(entityData);
if(!allEntityData.containsKey(entityData))
{
System.out.println("Adding entity!");
allEntityData.put(entityData, new ArrayList<int[]>());
}
else
{
System.out.println("ENTITY ALREADY EXISTS IN ARRAY");
}
}
/**
* Adds data (X, Y, and Z) to the corresponding UUID (Unique ID) for the entity. If the entity's UUID does not exist, then it prints out a line that says the UUID cannot be found.
* @param uuid
* @param data
*/
public void addData(StringArrayHolder entityData, String data)
{
System.out.println(entityData);
if(allEntityData.containsKey(entityData))
{
System.out.println("Adding data to entity!");
int[] rawData = new int[3];
String[] pureData = data.split(",");
rawData[0] = Integer.parseInt(pureData[0]);
rawData[1] = Integer.parseInt(pureData[1]);
rawData[2] = Integer.parseInt(pureData[2]);
List<int[]> entityLocData = allEntityData.get(entityData);
entityLocData.add(rawData);
allEntityData.put(entityData, entityLocData);
}
else
{
System.out.println("ENTITY DOES NOT EXIST IN ARRAY! :(");
//addEntity(entityData);
}
}
/**
* Gets the data for a specific UUID (Unique ID) for an entity.
* @param uuid
* @return
*/
public List<int[]> getDataForUUID(StringArrayHolder entityData)
{
List<int[]> entityLoc = allEntityData.get(entityData);
return entityLoc;
}
/**
* Clears all entities and their corresponding data from the map.
*/
public void clearAllEntitiesAndData()
{
allEntityData.clear();
}
/**
* Checks if entity exists inside of array
* @param uuid
* @return
*/
public boolean doesEntityExist(StringArrayHolder entityData)
{
List<int[]> entityLoc = allEntityData.get(entityData);
if(entityData != null)
{
return true;
}
return false;
}
}
和包装：
package timeTraveler.core;
import java.util.ArrayList;
public class StringArrayHolder
{
private String[] data;
public StringArrayHolder()
{
data = new String[2];
}
public void setData(String[] data)
{
this.data = data;
}
public String[] getData()
{
return this.data;
}
@Override
public int hashCode()
{
return 0;
//...
}
@Override
public boolean equals(Object o)
{
if(data.equals(o))
{
return true;
}
return false;
//...
}
}