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Maven: how to override the dependency added by a library
....version</version>
<exclusions>
<!-- STAX comes with Java 1.6 -->
<exclusion>
<artifactId>stax-api</artifactId>
<groupId>javax.xml.stream</groupId>
</exclusion>
<exclusion>
<artifactId>stax-api<...
When to use Comparable and Comparator
...clear how a comparable would sort, or do you have to resort to reading the javadoc? If it is the latter, odds are every future sorting use case would require a comparator, at which point the implementation of comparable may slow down users of the class, not speed them up.
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When to use StringBuilder in Java [duplicate]
... generally preferable to use a StringBuilder for string concatenation in Java. Is this always the case?
9 Answers
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What is the “N+1 selects problem” in ORM (Object-Relational Mapping)?
...2.
Most ORM tools give you several ways to prevent N+1 selects.
Reference: Java Persistence with Hibernate, chapter 13.
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How to convert a Map to List in Java?
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Using the Java 8 Streams API.
List<Value> values = map.values().stream().collect(Collectors.toList());
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@RequestBody and @ResponseBody annotations in Spring
...otation. I suggest you consult those sections. Also relevant: @RequestBody javadocs, @ResponseBody javadocs
Usage examples would be something like this:
Using a JavaScript-library like JQuery, you would post a JSON-Object like this:
{ "firstName" : "Elmer", "lastName" : "Fudd" }
Your controller...
Printing HashMap In Java
...();
System.out.println(key + " " + value);
}
Update for Java8:
example.entrySet().forEach(entry->{
System.out.println(entry.getKey() + " " + entry.getValue());
});
If you don't require to print key value and just need the hashmap value, you can use others' suggesti...
Why can't enum's constructor access static fields?
...ly better to use EnumSet.allOf() if you want to write code which exists in Java's documentation instead of just in the specs, but many people seem to be familiar with Enum.values() anyway.
– 4castle
Jun 21 '16 at 1:27
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Does JavaScript have the interface type (such as Java's 'interface')?
I'm learning how to make OOP with JavaScript . Does it have the interface concept (such as Java's interface )?
13 Answer...
Why cannot cast Integer to String in java?
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No. Every object can be casted to an java.lang.Object, not a String. If you want a string representation of whatever object, you have to invoke the toString() method; this is not the same as casting the object to a String.
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