大约有 7,481 项符合查询结果（耗时：0.0145秒） [XML]
Iterate through a HashMap [duplicate]
...
Extracted from the reference How to Iterate Over a Map in Java:
There are several ways of iterating over a Map in Java. Let's go over the most common methods and review their advantages and disadvantages. Since all maps in Java implement the Map interface, the following techniques ...
Change case of a file on Windows?
...cifically, I just want to change the case of the file, so that sourceCode.java becomes SourceCode.java , for example. The catch: I'm on a Windows box, and the filesystem thinks those are the same file name.
...
Avoiding instanceof in Java
...age);
}
}
}
More info on usage of variables of type Class in Java: http://docs.oracle.com/javase/tutorial/reflect/class/classNew.html
share
|
improve this answer
|
...
Why doesn't the example compile, aka how does (co-, contra-, and in-) variance work?
...ed in the presence of mutable data. This is why generics are invariant in Java. Brief example of unsoundness using Java arrays (which are erroneously covariant):
Object[] arr = new Integer[1];
arr[0] = "Hello, there!";
We just assigned a value of type String to an array of type Integer[]. For ...
Lombok is not generating getter and setter
...ory/org/projectlombok/lombok/1.16.10/lombok-1.16.10.jar), run it (Example: java -jar lombok-1.16.10.jar). A window should appear, browse to your eclipse.exe location.
Click on install.
Launch Eclipse, update project configuration on all projects and voila.
...
Why start an ArrayList with an initial capacity?
... post on the topic 2 months ago. The article is for C#'s List<T> but Java's ArrayList has a very similar implementation. Since ArrayList is implemented using a dynamic array, it increases in size on demand. So the reason for the capacity constructor is for optimisation purposes.
When one of t...
ADT requires 'org.eclipse.wst.sse.core 0.0.0' but it could not be found
...d and installed a Classic version of eclipse you are missing the essential Java Development Tools required by the Android SDK etc
I found that installing the Eclipse Java Development Tools & Java EE Tools solved this problem for me in Eclipse 3.7.
It seems obvious to many Java Developers but ...
How can I get an http response body as a string in Java?
...
@McDowell: oops thanks, I linked the javadoc for the method with encoding but I forgot to use it in the example. I added UTF-8 to the example for now, although technically should use the Content-Encoding header from the response if available.
...
Disable IntelliJ Starred (Package) Imports?
...
In IDEA 14+ the sequence is:
Settings > Editor > Code Style > Java > Imports > Class count to use import with '*'
In older version of IDEA:
Settings -> Java -> Code Style -> Imports -> Class count to use import with '*'
The feature can not be disabled. You need to s...
Display the current time and date in an Android application
...e current date & time into a TextView.
String currentDateTimeString = java.text.DateFormat.getDateTimeInstance().format(new Date());
// textView is the TextView view that should display it
textView.setText(currentDateTimeString);
There is more to read in the documentation that can easily be ...