Java CopyOnWriteArrayList clone() 方法

2025年3月21日 | 阅读 1 分钟

Java CopyOnWriteArrayList 类的 clone() 方法返回此列表的浅拷贝。在此方法中，元素本身不会被复制。

语法

返回值

此方法返回此列表的克隆。

示例 1

import java.util.concurrent.CopyOnWriteArrayList;

public class CopyOnWriteArrayListCloneExample1{
	
	public static void main(String[] args) {
		//Initializing CopyOnWriteArrayList of Integers
		CopyOnWriteArrayList<Integer>numbers = new CopyOnWriteArrayList<>(new Integer[] {1,2,1,4,5,3,3,8});
		//Prints the shallow copy of this list.
		System.out.println("Clone List is : " + numbers.clone());			
			}	
	}

输出

Clone List is : [1, 2, 1, 4, 5, 3, 3, 8]

示例 2

import java.util.concurrent.CopyOnWriteArrayList;

public class CopyOnWriteArrayListCloneExample2{
	
	public static void main(String[] args) {
		//Initializing CopyOnWriteArrayList of Integers
		CopyOnWriteArrayList<Integer>numbers = new CopyOnWriteArrayList<>(new Integer[] {});
		//Prints the shallow copy of this list.
		System.out.println("Clone List is : " + numbers.clone());	
				}	
		}

输出

Clone List is : []

示例 3

import java.util.concurrent.CopyOnWriteArrayList;

public class CopyOnWriteArrayListCloneExample3{
	
	public static void main(String[] args) {
		//Initializing CopyOnWriteArrayList of Strings
		CopyOnWriteArrayList<String>listOfNames = new CopyOnWriteArrayList<>(new String[] {"Tom","Harry","John","John","John","Jerry"});
		//Prints the shallow copy of this list.
		System.out.println("Clone List is : " + listOfNames.clone());		
			}	
		}

输出

Clone List is : [Tom, Harry, John, John, John, Jerry]

示例 4

import java.util.concurrent.CopyOnWriteArrayList;

public class CopyOnWriteArrayListCloneExample4{
	
	public static void main(String[] args) {
		//Initializing CopyOnWriteArrayList of Strings
		CopyOnWriteArrayList<String>listOfNames = new CopyOnWriteArrayList<>(new String[] {});
		//Prints the shallow copy of this list.
		System.out.println("Clone List is : " + listOfNames.clone());			
			}
	}

输出

Clone List is : []

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Java CopyOnWriteArrayList clone() 方法

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Java CopyOnWriteArrayList clone() 方法

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