toarray

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List class's toArray in Java- Why can't I convert a list of "Integer" to an "Integer" array?

I defined List<Integer> stack = new ArrayList<Integer>(); When I\'m trying to convert it to an array in the following way:[详细]

2023-04-01 07:15 分类：问答
Java List toArray(T[] a) implementation

I was just looking at the method defined in the List interface: Returns an array containing all of the elements in this list in the correct order; the runtime type of the returned array is that of t[详细]

2023-03-16 09:33 分类：问答
Converting array of Objects to array of custom Types

I have a method to build the array for the required type. It works for the primitive types. But when I have arra开发者_JAVA百科y of custom objects it doesn\'t work. So I have tweaked it. But still it[详细]

2023-03-14 18:01 分类：问答
Why does Java's Collection<E>.toArray() return an Object[] rather than an E[]?

Before Java generics, Collection.toArray() had no way to know which type of array the developer expected (particularly for an empty collection). As I understand it, this was the main rationale behind[详细]

2023-03-09 17:30 分类：问答
Can I rely on the LINQ ToArray() always returning a new instance?

I\'m looking for an easy way to clone off an IEnumerable<T> parameter for later reference. LINQ\'s ToArray extension method seems like a nice, concise way to do this.[详细]

2023-03-07 13:43 分类：问答
java: (String[])List.toArray() gives ClassCastException

The following code (run in android) always gives me a ClassCastException in the 3rd line: final String[] v1 = i18nCategory.translation.get(id);[详细]

2023-02-26 08:00 分类：问答
In Java (1.5 or later), what is the best performing way to fetch an (any) element from a Set?

In the code below, I needed to fetch an element, any element, from toSearch. I was unable to find a useful method on the Set interface definition to return just a single (random, but not required to b[详细]

2023-01-28 17:50 分类：问答
Java: how to implement `toArray` for `Collection`

Right now, I have: public <T> T[] toArray(T[] old) { T[] arr = Arrays.copyOf(old, old.length + size());[详细]

2023-01-22 06:39 分类：问答
Lock vs. ToArray for thread safe foreach access of List collection

I\'ve got a List collection and I want to iterate over it in a multi threaded app.I need to protect it every time I iterate it since it could be changed and I don\'t want \"collection was modified\" e[详细]

2023-01-05 02:17 分类：问答
Doctrine toarray does not convert relations

I followed doctrine documnet开发者_运维问答ation to get started. Here is the documentation. My code is[详细]

2022-12-24 06:04 分类：问答