Java中ArrayList和CopyOnWriteArrayList之间的区别
以下是Java中ArrayList和CopyOnWriteArrayList类之间的显着区别。
示例
import java.util.Iterator;
import java.util.concurrent.CopyOnWriteArrayList;
public class Tester {
public static void main(String args[]) {
//创建一个数组列表
CopyOnWriteArrayList<String> al = new CopyOnWriteArrayList();
System.out.println("Initial size of al: " + al.size());
//将元素添加到数组列表
al.add("C");
al.add("A");
al.add("E");
al.add("B");
al.add("D");
al.add("F");
al.add(1, "A2");
System.out.println("Size of al after additions: " + al.size());
//显示数组列表
System.out.println("Contents of al: " + al);
//从数组列表中删除元素
al.remove("F");
al.remove(2);
System.out.println("Size of al after deletions: " + al.size());
System.out.println("Contents of al: " + al);
try{
Iterator<String> iterator = al.iterator();
while(iterator.hasNext()) {
iterator.remove();
}
}catch(UnsupportedOperationException e) {
System.out.println("不支持的方法：");
}
System.out.println("Size of al: " + al.size());
}
}这将产生以下结果-
输出结果
Initial size of al: 0 Size of al after additions: 7 Contents of al: [C, A2, A, E, B, D, F] Size of al after deletions: 5 Contents of al: [C, A2, E, B, D] 不支持的方法： Size of al: 5
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