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iterating over and removing from a map [duplicate]
...
As of Java 8 you could do this as follows:
map.entrySet().removeIf(e -> <boolean expression>);
Oracle Docs: entrySet()
The set is backed by the map, so changes to the map are reflected in the set, and vice-versa
...
Easy way of running the same junit test over and over?
...ic void testMyCode() {
//your test code goes here
}
}
Repeat.java
import static java.lang.annotation.ElementType.ANNOTATION_TYPE;
import static java.lang.annotation.ElementType.METHOD;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang...
What's the difference between including files with JSP include directive, JSP include action and usi
...formation regarding the JSP page as a
whole.
Scripting elements: These are Java coding elements such as
declarations, expressions, scriptlets, and comments.
Objects and scopes: JSP objects can be created either explicitly or
implicitly and are accessible within a given scope, such as from
anywhere i...
What's the difference between a method and a function?
...between functions and member functions in C++. Furthermore, languages like Java only have methods. In this case, functions would be analogous to static methods and methods would have the same meaning. For 2), you should add that a method is able to operate on the private instance (member) data decl...
Benefits of prototypal inheritance over classical?
So I finally stopped dragging my feet all these years and decided to learn JavaScript "properly". One of the most head-scratching elements of the languages design is it's implementation of inheritance. Having experience in Ruby, I was really happy to see closures and dynamic typing; but for the li...
What are the differences between Mustache.js and Handlebars.js?
...oducing logic into your templates.
Mustache has many different compilers (JavaScript, Ruby, Python, C, etc.). Handlebars began in JavaScript, now there are projects like django-handlebars, handlebars.java, handlebars-ruby, lightncandy (PHP), and handlebars-objc.
...
Create a string with n characters
Is there a way in java to create a string with a specified number of a specified character? In my case, I would need to create a string with 10 spaces. My current code is:
...
How to use null in switch
...
This is not possible with a switch statement in Java. Check for null before the switch:
if (i == null) {
doSomething0();
} else {
switch (i) {
case 1:
// ...
break;
}
}
You can't use arbitrary objects in switch statements*. The reason tha...
Converting JSONarray to ArrayList
... }\n" +
" }\n" +
" ]";
ContactModel.java:
public class ContactModel {
public String id;
public String name;
public String email;
}
Code for converting a JSON string to ArrayList<Model>:
Note: You have to import java.lang.reflect.Type;:...
Disable HttpClient logging
...ur exactly setup.
Commons-Logging can log to log4j, but it can also log to java.util.logging (JDK1.4 logging)
Commons-Logging tries to be smart and guess which logging framework you are already using, and send its logs to that.
If you don't already have a logging framework, and are running on a JRE ...