问题描述
我在尝试从Java中的2D int数组获取特定项目的索引时遇到问题。
所以这就是我所拥有的...
private int[][] mobPoints = {
{9300127,2},{9300128,2},{9300129,2},{9300130,3},{9300131,3},
{9300132,3},{9300133,3},{9300134,4},{9300135,4},{9300136,5}};
每个数组中的第一个数字是生物识别号,第二个数字是它值得的点数。 我希望它的工作方式是,当玩家杀死一个暴徒时,服务器会检测到该暴徒,并通过一种方法将其发送,该方法会根据该暴徒值得的点数来增加变量。 例:
public void addPoints(int mobid) {
}
我遇到的麻烦是使用给定的mobid并获取它的价值。 我不想使用HashMaps或ArrayLists,因为我似乎无法预定义它们(我必须创建一个新的ArrayList,然后在创建时添加每个值)。
1楼
如果您希望代码能够缩放并保持高性能HashMap<Integer, Integer>
可能要尝试使用HashMap<Integer, Integer>
。
public class MobScene {
private HashMap<Integer, Integer> mobs = new HashMap<Integer, Integer>(10);
// Note that '10' is the initial capacity of the Collection.
// I only use it as I already know the given capacity and avoid extra memory being reserved.
public MobScene() {
mobs.put(9300127,2);
mobs.put(9300128,2);
mobs.put(9300129,2);
mobs.put(9300130,3);
mobs.put(9300131,3);
mobs.put(9300132,3);
mobs.put(9300133,4);
mobs.put(9300134,4);
mobs.put(9300135,5);
mobs.put(9300136,6);
}
public void addPoints(int mobid) {
if(mobs.contains(mobid)) {
mobs.put(mobs.get(mobid) + 1);
}
}
}
2楼
这将完成工作。
public void addPoints(int mobid) {
// create a boolean to know if key has been found
boolean found = false;
// iterate over first column of your matrix array
for (int c = 0; c < mobPoints.length; c++) {
// if the key still not found and is equal first column value
if (!found && mobPoints[c][0] == mobid) {
// add points or do your stuff
System.err.println("Value = " + mobPoints[c][1]);
// mark as found
found = true;
}
}
if (!found) {
// not found error
}
}