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Why is String immutable in Java?
...d, immutability of String only means you cannot change it using its public API. You can in fact bypass the normal API using reflection. See the answer here.
In your example, if String was mutable, then consider the following example:
String a="stack";
System.out.println(a);//prints stack
a.s...
Java: difference between strong/soft/weak/phantom reference
...h references are cleared or themselves become unreachable." source: Java8 API Docs PhantomReference
– theRiley
Aug 28 at 19:17
...
内存管理内幕：动态分配的选择、折衷和实现 - C/C++ - 清泛网 - 专注C/C++及内核技术
...调用的 程序还是由被调用的函数来负责这一问题，很多 API 都不是很明确。
因为管理内存的问题，很多程序倾向于使用它们自己的内存管理规则。C++ 的异常处理使得这项任务更成问题。有时好像致力于管理内存分配和清理的代...
How to find all serial devices (ttyS, ttyUSB, ..) on Linux without opening them?
...
Thanks to Soren for this, even we know the APIs and some idea on it but you did really good Soren, thanks again.
– ind79ra
Jan 19 '16 at 10:17
...
How to specify function types for void (not Void) methods in Java8?
...By the way, Block was changed for Consumer in latest releases of the JDK 8 API
– Edwin Dalorzo
Dec 4 '13 at 15:45
4
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What does SynchronizationContext do?
...e new async / await keywords and the Task Parallel Library (TPL), i.e. the API surrounding the Task and Task<TResult> classes. These will, to a very high degree, take care of capturing the UI thread's synchronization context, starting an asynchronous operation, then getting back onto the UI th...
How to send POST request in JSON using HTTPClient in Android?
...pURLConnectioninstead HttpGet. As HttpGet is already deprecated in Android API level 22.
HttpURLConnection httpcon;
String url = null;
String data = null;
String result = null;
try {
//Connect
httpcon = (HttpURLConnection) ((new URL (url).openConnection()));
httpcon.setDoOutput(true);
htt...
How to use Sphinx's autodoc to document a class's __init__(self) method?
...anted methods like __init__(), __enter__() and __exit__() to show up in my API documentation (after all, these "special methods" are part of the API and what better place to document them than inside the special method's docstring).
Recently I took the best implementation and made it part of one of...
How to make an array of arrays in Java
...rays are cumbersome, in most cases you are better off using the Collection API.
With Collections, you can add and remove elements and there are specialized Collections for different functionality (index-based lookup, sorting, uniqueness, FIFO-access, concurrency etc.).
While it's of course good an...
How to check file MIME type with javascript before upload?
...ould.
if (window.FileReader && window.Blob) {
// All the File APIs are supported.
} else {
// File and Blob are not supported
}
Step 1:
You can retrieve the File information from an <input> element like this (ref):
<input type="file" id="your-files" multiple>
<scr...