如何迭代向量的向量

Question

How do I iterate over a Vector of Vectors in Java? 如何遍历Java中的向量Vector？ I tried doing it like in C++ : 我尝试像在C ++中那样做：

Vector<Vector<String>> elements = new Vector<Vector<String>>();
// ...
System.out.print(elements[0][0]);

But obviously that would not work. 但是显然那是行不通的。

Answer 1

To iterate through all the elements use a code similar to the following: 要遍历所有元素，请使用类似于以下内容的代码：

for (Vector<String> v : elements) {
    for (String s : v) {
        // Use s as you like
    }
}

To access a specific element: 要访问特定元素：

int x = ...
int y = ...
...
String s = elements.get(x).get(y);