Class DoubleList

java.lang.Object
cloud.opencode.base.collections.primitive.DoubleList
All Implemented Interfaces:
Serializable, Iterable<Double>
public final class DoubleList extends Object implements Serializable, Iterable<Double>
DoubleList - Primitive double List DoubleList - 原始 double 列表

A resizable array implementation for primitive double values. Avoids boxing overhead of Double objects.

原始 double 值的可调整大小数组实现。避免 Double 对象的装箱开销。

Features | 主要功能:

  • No boxing overhead - 无装箱开销
  • Memory efficient - 内存高效
  • Random access - 随机访问
  • Resizable - 可调整大小
  • Stream support - 流支持

Usage Examples | 使用示例:

// Create empty - 创建空
DoubleList list = DoubleList.create();

// Create from values - 从值创建
DoubleList list = DoubleList.of(1.0, 2.0, 3.0);

// Operations - 操作
list.add(10.5);
double value = list.get(0);

// Statistics - 统计
double sum = list.sum();
double avg = list.average();

Performance | 性能特性:

  • get/set: O(1) - get/set: O(1)
  • add: O(1) amortized - add: O(1) 均摊
  • contains: O(n) - contains: O(n)

Security | 安全性:

  • Thread-safe: No - 线程安全: 否
  • Null-safe: N/A (primitive) - 空值安全: 不适用（原始类型）
Since:
JDK 25, opencode-base-collections V1.0.0
Author:
Leon Soo www.LeonSoo.com
See Also:

  • Method Details

    • create

      public static DoubleList create()
      Create an empty DoubleList. 创建空 DoubleList。
      Returns:
      new DoubleList | 新的 DoubleList

    • create

      public static DoubleList create(int initialCapacity)
      Create a DoubleList with initial capacity. 创建指定初始容量的 DoubleList。
      Parameters:
      initialCapacity - initial capacity | 初始容量
      Returns:
      new DoubleList | 新的 DoubleList

    • of

      public static DoubleList of(double... values)
      Create a DoubleList from values. 从值创建 DoubleList。
      Parameters:
      values - the values | 值
      Returns:
      new DoubleList | 新的 DoubleList

    • size

      public int size()

    • isEmpty

      public boolean isEmpty()

    • get

      public double get(int index)

    • set

      public double set(int index, double value)

    • add

      public void add(double value)

    • add

      public void add(int index, double value)

    • addAll

      public void addAll(double... values)

    • removeAt

      public double removeAt(int index)

    • remove

      public boolean remove(double value)

    • clear

      public void clear()

    • contains

      public boolean contains(double value)

    • indexOf

      public int indexOf(double value)

    • lastIndexOf

      public int lastIndexOf(double value)

    • sum

      public double sum()

    • min

      public double min()

    • max

      public double max()

    • average

      public double average()

    • variance

      public double variance()
      Return the variance. 返回方差。
      Returns:
      variance | 方差
      Throws:
      NoSuchElementException - if empty | 如果为空

    • standardDeviation

      public double standardDeviation()
      Return the standard deviation. 返回标准差。
      Returns:
      standard deviation | 标准差
      Throws:
      NoSuchElementException - if empty | 如果为空

    • toArray

      public double[] toArray()

    • stream

      public DoubleStream stream()

    • sort

      public void sort()

    • reverse

      public void reverse()

    • primitiveIterator

      public PrimitiveIterator.OfDouble primitiveIterator()

    • iterator

      public Iterator<Double> iterator()
      Specified by:
      iterator in interface Iterable<Double>

    • forEach

      public void forEach(DoubleConsumer action)

    • equals

      public boolean equals(Object o)
      Overrides:
      equals in class Object

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • toString

      public String toString()
      Overrides:
      toString in class Object