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Why Java 7 include feature of underscore numeric literals why not comma numeric literals?
The "," operator already has meaning, so existing code would change meaning:
// Is this 3 values or 2?
int[] values = { 123,456, 789 };
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I have the following statement. The map always returned "Closed". But I think this statement s -> "CLOSED" could be rewritten using a better style.
Is there any better way to represent this?
String status = myOptional.map(s -> "CLOSED").orElse("OPEN");
Just use a ternary operatory to check for its presence :
String status = myOptional.isPresent() ? "CLOSED" : "OPEN";
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I want to mask the string before the first white space
Eg. "123 test1" mask to xxtest1
"12/6786 test2" mask to xxtest2
Using string replace all with regex
I tried this ^.*?[^\s]*\s and it seems to be working to your case.
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When a constant variable ends with a number, do you need to put an underscore in between the number and the rest of the variable?
I haven't found a Java naming convention for this case.
For example YELLOW3 or YELLOW_3
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As per Java's standard we should follow CamelCase. But why String's method substring() is not in camelCase ? Is it for any specific reason or just an mistake from the initial days ?
I'd say because substring is one physical word.
camelCase is used to separate words, substring is not to be intended as Sub String but as Substring... so the convention is respected.
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I am currently writing a game in Java, where words in a string will have to be all changed to equal 5 characters a word.
eg. I am writing in Java
Iamwr iting inJav a
I wonder if anyone knows how I would do this?
First remove spaces between words.
Then split that resulting String to length with 5.
Add a space after every 5 character.