你去看看Vector的源代码,他的方法都是 public synchronized Object add(Object obj) 这个样子的?还有,哪个家伙告诉你 、,方法没有synchronized关键字???
比如这样的: add public boolean add(E o)Appends the specified element to the end of this Vector. Specified by: add in interface Collection<E> Specified by: add in interface List<E> Overrides: add in class AbstractList<E> Parameters: o - element to be appended to this Vector. Returns: true (as per the general contract of Collection.add). Since: 1.2 在java那个网站看的http://java.sun.com/j2se/1.5.0/docs/api/ 确实不知道怎么看哪里写synchronized不要取笑:)
这个是源代码,你自己看吧 /** * Appends the specified element to the end of this Vector. * * @param o element to be appended to this Vector. * @return true (as per the general contract of Collection.add). * @since 1.2 */ public synchronized boolean add(E o) { modCount++; ensureCapacityHelper(elementCount + 1); elementData[elementCount++] = o; return true; }
public synchronized Object add(Object obj)
这个样子的?还有,哪个家伙告诉你 、,方法没有synchronized关键字???
add
public boolean add(E o)Appends the specified element to the end of this Vector. Specified by:
add in interface Collection<E>
Specified by:
add in interface List<E>
Overrides:
add in class AbstractList<E>
Parameters:
o - element to be appended to this Vector.
Returns:
true (as per the general contract of Collection.add).
Since:
1.2
在java那个网站看的http://java.sun.com/j2se/1.5.0/docs/api/
确实不知道怎么看哪里写synchronized不要取笑:)
* Appends the specified element to the end of this Vector.
*
* @param o element to be appended to this Vector.
* @return true (as per the general contract of Collection.add).
* @since 1.2
*/
public synchronized boolean add(E o) {
modCount++;
ensureCapacityHelper(elementCount + 1);
elementData[elementCount++] = o;
return true;
}
Specified by:
add in interface Collection <E>
这句话的意思是说Collection 接口有add方法 因为vector实现了collection接口
所以vector也要指定add方法。(翻译真困难)
所以add in interface Collection <E>
这一句并不是方法的声明。而是一个说明性句子。