因为 Arrays.asList 返回的 ArrayList 是 Arrays 的静态内部私有类实现,不是常用的那个 ArrayList,这里的 ArrayList 继承自 AbstractList,但是只实现了 size、toArray、get、set、contains 几个方法,其他常见的 add、remove 等方法都没实现,所以才抛出异常了。此外像 ArrayList<Integer> list = Arrays.asList(1, 2...
elementData = Arrays.copyOf(elementData, newCapacity); } } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 这个方法首先将当前未添加的数组长度拿到,之后判断minCapacity(即size+1)是否大于oldCapacity,若大于,则调整容量为max((oldCapacity*3)/2+1,minCapacity),调整elementData容量为新的容量,即将返...
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ArrayList<String> directory = new ArrayList<String>(); File file = new File(path); if(file.isDirectory()) { directory.add(file.getAbsolutePath()); while (directory.size() > 0) { String folderPath = directory.get(0); System.out.println("Size of this :"+folderPath); ...
int size() Returns the number of elements in this list. void trimToSize() Trims the capacity of this ArrayList instance to be the list's current size. importjava.util.ArrayList;/*java2s.com*/publicclassMain {publicstaticvoidmain(String args[]) { ArrayList<String> al ...
}elseif(maxFileSize >0&& fileField.getSize() > maxFileSize) {// File size exceeds maximum file size.request.setAttribute(fileField.getFieldName(),newFileUploadException("File size "+"exceeds maximum file size of "+ maxFileSize +" bytes."));// Immediately delete temporary file to free up...
LIist list = new ArrayList();list.get(0); // IndexOutOfBoundsException这个时候的数组没有index,长度是0
WebPartDescriptions();if(descriptions.Count >0) { ArrayList partList =newArrayList();// Add the WebPart controls to a collection before you call// AddWebPart on the WebPartManager. If you try to add the// controls directly by using AddWebPart, the WebPartAdded// event fires each time yo...
osg::Geometry::ArrayList& arrayList = from.getVertexAttribArrayList();for(unsignedintvi=0;vi< arrayList.size();++vi) { osg::Array*array= arrayList[vi].get();if(array) {if(!copyToSelf) target.setVertexAttribArray(vi,array); }