Is there a Java equivalent for LINQ? [duplicate] - java

This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
What is the Java equivalent for LINQ?
There are numerous questions asking whether there is a Java equivalent for LINQ. But most of them are incorrectly specifying that there is nothing.

This library provides a full LINQ API: https://github.com/nicholas22/jpropel-light
It does so with functional-style constructs and it also uses deferred execution.
// select names starting with j, using LINQ-style statements
new String[] { "james", "john", "john", "eddie" }.where(startsWith("j")).distinct().all(println());

Another one that I've tried myself is jaque: http://code.google.com/p/jaque/

Related

Determine the user’s location and translate error messages [duplicate]

This question already has answers here:
how to detect operating system language (locale) from java code
(4 answers)
Closed 4 years ago.
I'm not sure if this is possible off-hand so bear with me. I'm trying to use no external API calls from Java and determine the users language and somehow show translated strings.
Is this something you can do in Java without getting the data from online or something similar? I'm trying to make it available as an offline application but I just don't know how.
Edit:
I'm looking for a way to check with only the standard Java API's
How about something like this:
LanguageTest lt = new LanguageTest();
System.out.println(lt.getGreeting());
private class LanguageTest{
String lang = Locale.getDefault().getLanguage().toLowerCase();
public String getGreeting(){
return (lang.contains("fr") ? "Bonjour" : "Hello");
}
}
In the above example if the language is not french it will default to english.

Why should java variable names start with lowercase characters? [duplicate]

This question already has answers here:
camel case method names
(12 answers)
Closed 7 years ago.
I do not understand what the difference between
int Hello ;
and
int hello ;
is .
Does it make a big difference if i use upper case Characters ?
That's because of Java Convention!
Actually, you can write a program like the way you're imagining but, you won't be following any pattern.......If you become a real programmer someday, you'll understand that patterns exist to make things better and easier.....

What do the paired "<" and ">" symbols mean in Java? (For example, ArrayList<String>) [duplicate]

This question already has answers here:
What is the role of the data types inside of < > in Java? [duplicate]
(5 answers)
Closed 8 years ago.
I am familiar with using parentheses, as in myMethod(myParameter), in Java and other programming languages, but what do the lesser than < and greater than > signs mean when they are used together in a array name? Is there a special name for them?
Sorry if this is a duplicate, but I don't know how to search for this.
Clarification: I wasn't referring to the role of any specific type inside the symbols, but rather the usage of the <> symbols themselves.
it is java generics, for type safe, and always.using with collections.
i suggest you read the SCJP book, it has a chapter called Generics and Collections, it provides all details you will need, it really helpful. hope it helps.

Java : String representation from Integer [duplicate]

This question already has answers here:
How to convert number to words in java
(31 answers)
Closed 9 years ago.
I'm having a list of Integer from 1 to 100. If I loop through the list, I wanted to make the output as,
"One"
"Two" .....
"Hundred"
Is there any direct method in Java to obtain the above output?
No such method or class has been provided by JDK.
You can use the code mentioned here or here for reference purpose.
switch case are used to meet that requirement: Here
is source code.
Answer of this question described here: How to convert number to words in java
Officially this is not possible or no standard library available by native Java.
Don't duplicate.
There is none in the official Java libraries. However, the International Components for Unicode project has a RuleBasedNumberFormat with those capabilities. It even has a SPELLOUT constant.

How to convert string to math equation? [duplicate]

This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
Java: Parse a mathematical expression given as a string and return a number
Hello there,
I would like to ask you, if exist some way how to convert string "1+2+3" to math equation? Exist for this purpose some function or method in Java?
Thanks for hints.
It's not part of the standard API.
But I implemented it in my project, you can have a look here.
https://github.com/MarkyVasconcelos/Towel/wiki/Expression
This would necessarily depend on the implementation of the Equation class you're using. Check its API.

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