问题遇到的现象和发生背景
背景:我有数据对象itemData,需求呢就是根据pw字段或者toa字段或者pa字段来统计,选出出现次数最多的那一组数据返回。
List<Itemdata> list
```java
```java
public class ItemData{
public String type = "ini";
public double pw;
public int toa;
public double pa;
public boolean pwValid = true;
public int channel1;
public double fre1;
public int channel2;
public double fre2;
public int toaCnt;
}
我的解答思路和尝试过的方法
我解决的思路就是分别写三个函数,来完成对应的功能;但是三个函数代码几乎一模一样,可是我又没有更好的办法合并起来:
protected List<ItemData> findMostFre(List<ItemData> list){
Map<Integer,Integer> freMap = new HashMap<>();
Map<Integer,List<ItemData>> freMapList = new HashMap<>();
for (ItemData itemData : list) {
int freCache = (int) itemData.fre1;
freMap.put(freCache,freMap.getOrDefault(freCache,0)+1);
List<ItemData> listCache = freMapList.getOrDefault(freCache,new ArrayList<>());
listCache.add(itemData);
freMapList.put(freCache,listCache);
}
int maxFreCount = Collections.max(freMap.values());
int maxFreKey = 0;
for (Integer key : freMap.keySet()) {
if(freMap.get(key) == maxFreCount){
maxFreKey = key;
break;
}
}
Main.log("dual: freMap:" + freMap);
return freMapList.get(maxFreKey);
}
protected List<ItemData> findMostToa(List<ItemData> list){
Map<Integer,Integer> toaMap = new HashMap<>();
Map<Integer,List<ItemData>> toaMapList = new HashMap<>();
for (ItemData itemData : list) {
toaMap.put(itemData.toa,toaMap.getOrDefault(itemData.toa,0)+1);
List<ItemData> listCache = toaMapList.getOrDefault(itemData.toa,new ArrayList<>());
listCache.add(itemData);
toaMapList.put(itemData.toa,listCache);
}
int maxToaCount = Collections.max(toaMap.values());
int maxToaKey = 0;
for (Integer key : toaMap.keySet()) {
if(toaMap.get(key) == maxToaCount){
maxToaKey = key;
break;
}
}
Main.log("dual: toaMap:" + toaMap);
return toaMapList.get(maxToaKey);
}
protected List<ItemData> findMostPw(List<ItemData> list){
Map<Integer,Integer> pwMap = new HashMap<>();
Map<Integer,List<ItemData>> pwMapList = new HashMap<>();
for (ItemData itemData : list) {
int pwCache = (int) itemData.pw;
pwMap.put(pwCache,pwMap.getOrDefault(pwCache,0)+1);
List<ItemData> listCache = pwMapList.getOrDefault(pwCache,new ArrayList<>());
listCache.add(itemData);
pwMapList.put(pwCache,listCache);
}
int maxFreCount = Collections.max(pwMap.values());
int maxPwKey = 0;
for (Integer key : pwMap.keySet()) {
if(pwMap.get(key) == maxFreCount){
maxPwKey = key;
break;
}
}
Main.log("dual: pwMap:" + pwMap);
return pwMapList.get(maxPwKey);
}
我想要达到的结果
能不能用一个函数就完成类似的功能呢?