程序包 io.github.kylinhunter.commons.collections

类 MapUtils

  • public class MapUtils
extends java.lang.Object
    作者:
    BiJi'an
    Description:
    Date:
    2022/1/1

    • 字段概要

      字段 
      修饰符和类型 字段 说明
      static int MAX_POWER_OF_TWO  

    • 方法概要

      所有方法 静态方法 具体方法 
      修饰符和类型 方法 说明
      static boolean isEmpty​(java.util.Map<?,​?> map)  
      static <K,​V>
      java.util.concurrent.ConcurrentMap<K,​V>      		 newConcurrentMap()  
      static <K,​V>
      java.util.HashMap<K,​V>      		 newHashMap()  
      static <K,​V>
      java.util.HashMap<K,​V>      		 newHashMap​(int expectedSize)  
      static <K,​V>
      java.util.LinkedHashMap<K,​V>      		 newLinkedHashMap()  
      static <K extends java.lang.Comparable,​V>
      java.util.TreeMap<K,​V>      		 newTreeMap()  
      static <C,​K extends C,​V>
      java.util.TreeMap<K,​V>      		 newTreeMap​(java.util.Comparator<C> comparator)  
      static <K,​V>
      java.util.TreeMap<K,​V>      		 newTreeMap​(java.util.SortedMap<K,​? extends V> map)  

      • 从类继承的方法 java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • 字段详细资料

      • MAX_POWER_OF_TWO

        public static final int MAX_POWER_OF_TWO
        另请参阅:
        常量字段值

    • 方法详细资料

      • newHashMap

        public static <K,​V> java.util.HashMap<K,​V> newHashMap()
        返回:
        java.util.HashMap
        Description:
        Date:
        2023-03-19 16:06
        Title:
        newHashMap

      • newHashMap

        public static <K,​V> java.util.HashMap<K,​V> newHashMap​(int expectedSize)
        参数:
        expectedSize - expectedSize
        返回:
        java.util.HashMap
        Description:
        newHashMapWithExpectedSize
        Date:
        2023-06-10 01:39
        Title:
        newHashMapWithExpectedSize

      • newConcurrentMap

        public static <K,​V> java.util.concurrent.ConcurrentMap<K,​V> newConcurrentMap()
        返回:
        java.util.concurrent.ConcurrentMap
        Description:
        Date:
        2023-03-19 22:12
        Title:
        newConcurrentMap

      • newLinkedHashMap

        public static <K,​V> java.util.LinkedHashMap<K,​V> newLinkedHashMap()
        返回:
        java.util.LinkedHashMap
        Description:
        Date:
        2023-03-19 22:12
        Title:
        newLinkedHashMap

      • isEmpty

        public static boolean isEmpty​(java.util.Map<?,​?> map)
        参数:
        map - map
        返回:
        boolean
        Description:
        Date:
        2023-03-19 15:19
        Title:
        isEmpty

      • newTreeMap

        public static <K extends java.lang.Comparable,​V> java.util.TreeMap<K,​V> newTreeMap()

      • newTreeMap

        public static <K,​V> java.util.TreeMap<K,​V> newTreeMap​(java.util.SortedMap<K,​? extends V> map)

      • newTreeMap

        public static <C,​K extends C,​V> java.util.TreeMap<K,​V> newTreeMap​(java.util.Comparator<C> comparator)