cn.langpy.core

类 MapFrame<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap<K,V>

java.util.LinkedHashMap<K,V>

cn.langpy.core.MapFrame<K,V>

所有已实现的接口:

Serializable, Cloneable, Map<K,V>

public class MapFrame<K,V>
extends LinkedHashMap<K,V>

另请参阅:

序列化表格

嵌套类概要

从类继承的嵌套类/接口 java.util.AbstractMap

AbstractMap.SimpleEntry<K,V>, AbstractMap.SimpleImmutableEntry<K,V>

构造器概要

构造器

构造器和说明
MapFrame()

方法概要

限定符和类型	方法和说明
<T> MapFrame<K,T>	avg(String avgColumn)
<T> MapFrame<K,T>	concat(String concatColumn)
<T> MapFrame<K,T>	count()
MapFrame<K,MapFrame<Object,ListFrame>>	groupBy(String column)
<T> MapFrame<K,T>	max(String maxColumn)
<T> MapFrame<K,T>	min(String minColumn)
<T> MapFrame<K,T>	sum(String sumColumn)
Map<K,Double>	toHashMap()

从类继承的方法 java.util.LinkedHashMap

clear, containsValue, entrySet, forEach, get, getOrDefault, keySet, removeEldestEntry, replaceAll, values

从类继承的方法 java.util.HashMap

clone, compute, computeIfAbsent, computeIfPresent, containsKey, isEmpty, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, size

从类继承的方法 java.util.AbstractMap

equals, hashCode, toString

从类继承的方法 java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

从接口继承的方法 java.util.Map

compute, computeIfAbsent, computeIfPresent, containsKey, equals, hashCode, isEmpty, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, size

构造器详细资料

MapFrame

public MapFrame()

方法详细资料

groupBy

public MapFrame<K,MapFrame<Object,ListFrame>> groupBy(String column)

count

public <T> MapFrame<K,T> count()

sum

public <T> MapFrame<K,T> sum(String sumColumn)

max

public <T> MapFrame<K,T> max(String maxColumn)

min

public <T> MapFrame<K,T> min(String minColumn)

concat

public <T> MapFrame<K,T> concat(String concatColumn)

avg

public <T> MapFrame<K,T> avg(String avgColumn)

toHashMap

public Map<K,Double> toHashMap()