java 向量到数组列表
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java vector to arraylist
提问by coder247
Is there any way to copy or convert a vector to arraylist in Java?
有没有办法在 Java 中将向量复制或转换为数组列表？
采纳答案by Jon Skeet
Yup - just use the constructor which takes a collection as its parameter:
是的 - 只需使用以集合作为参数的构造函数：
Vector<String> vector = new Vector<String>();
// (... Populate vector here...)
ArrayList<String> list = new ArrayList<String>(vector);
Note that it only does a shallow copy.
请注意，它只执行浅拷贝。
回答by Kevin Parker
I just wrote a class to do the same thing, but is more flexible as it will accept Objects accordingly.
我只是写了一个类来做同样的事情，但更灵活，因为它会相应地接受对象。
public class ExteriorCastor {
public static ArrayList vectorToArrayList(Vector vector){
if (vector == null){return null;}
return new ArrayList<Object>(vector);
}
}
回答by Javier
i′m not sure if it is length()or size().... but the idea is the next:
我不确定它是length()还是size()......但接下来的想法是：
ArrayList<Object> a;
for(int i = 0;i < Vector.length() ; i++)
a.add(Vector.elementAt(i); // Again... i′m not sure if this is elementAt() or get()
Vector.finalize();
