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Reverse a string in Java
...use java.util.StringBuffer instead of StringBuilder — they have the same API. Thanks commentators for pointing out that StringBuilder is preferred nowadays when there is no concurrency concern.
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A method to reverse effect of java String.split()? [duplicate]
...'s java.util.StringJoiner class. http://download.java.net/lambda/b81/docs/api/java/util/StringJoiner.html
Here is the Oracle issue if you are interested.
http://bugs.sun.com/view_bug.do?bug_id=5015163
Update
Here is an example of the new JDK 8 StringJoiner on an array of String
String[] a = new...
Best practice for nested fragments in Android 4.0, 4.1 (
...h I do not want to use the support libraries (if not needed) but the 4.x api only therefore.
5 Answers
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Pros and cons to use Celery vs. RQ [closed]
...ereas Celery lets you send tasks from one language to a different language
API. Celery is extremely flexible (multiple result backends, nice config format, workflow canvas support) but naturally this power can be confusing. By contrast, the RQ api is simple.
Subtask support. Celery supports subtask...
What is the use of interface constants?
...erface causes this implementation detail to leak into the class's exported API. It is of no consequence to the users of a class that the class implements a constant interface. In fact, it may even confuse them. Worse, it represents a commitment: if in a future release the class is modified so that i...
Check if a path represents a file or a folder
...
Clean solution while staying with the nio API:
Files.isDirectory(path)
Files.isRegularFile(path)
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Detect enter press in JTextField
... uses an Action, which implements ActionListener because Action is a newer API with addition features. For example you could disable the Action which would disable the event for both the text field and the button.
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File path to resource in our war/WEB-INF folder?
...le is expanded (a set of files instead of one .war file), you can use this API:
ServletContext context = getContext();
String fullPath = context.getRealPath("/WEB-INF/test/foo.txt");
http://tomcat.apache.org/tomcat-5.5-doc/servletapi/javax/servlet/ServletContext.html#getRealPath(java.lang.String)...
How to record webcam and audio using webRTC and a server-based Peer connection
...of overkill, especially considering the fact that Chrome has MediaRecorder API support from v47 and Firefox since v25. So at this junction, you might not even need an external js library to do the job, try this demo I made to record video/ audio using MediaRecorder:
Demo - would work in chrome and ...
Create objective-c class instance by name?
...cleaner, then you could utilize the Objective-C language runtime library's API. Under Objective-C 2.0:
#import <objc/runtime.h>
//Declaration in the above named file
id objc_getClass(const char* name);
//Usage
id c = objc_getClass("Object");
[ [ c alloc ] free ];
Under the Objective-C (1.0...