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Please explain the usage of Labeled Statements
(3 answers)
Java Label usage [duplicate]
(2 answers)
"loop:" in Java code. What is this, and why does it compile?
(12 answers)
Should I avoid using Java Label Statements?
(12 answers)
Closed 4 years ago.
I've read some tutorials which using this syntax in Java, but I don't know what it's mean?
newNumber:while (1 <= 500) {
// do something
}
I don't understand what newNumber:while mean and I can't find it on oracle documentation.
newValue is label here. You can use it with break and continue statement. It becomes relevant for nesting loops when you want to jump from inside the nested loop.
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How does the Java 'for each' loop work?
(29 answers)
Closed 5 years ago.
How this for loop statement works? Can we only use it to print arrays?
for (Integer i : arrayToSort){
System.out.println(i.intValue());
}
This is the for-each loop, you can use it like the normal for-loop. Only the syntax is different. Please look at the https://docs.oracle.com/javase/8/docs/technotes/guides/language/foreach.html
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What is the ellipsis (...) for in this method signature?
(5 answers)
What do 3 dots next to a parameter type mean in Java?
(9 answers)
Closed 5 years ago.
I'm looking at the Files class in java 7, and I see this method
copy(InputStream, Path, CopyOptions...)
How do I read "CopyOptions...". What's the ... mean?
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Is there a longer than int Java List?
(3 answers)
Using a long as ArrayList index in java
(7 answers)
Closed 7 years ago.
I want to have a big ArrayList, so its index would go beyond int, how or what can I use for that?
I already checked that Vector does have the same issue, any ideas?
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Is there a good reason to use "printf" instead of "print" in java?
(4 answers)
Closed 8 years ago.
Just came to know that java does has a method named printf, then what is the difference between printf & println?
System.out.println(); is efficient for simply printing a line of text. If the line of text needs to be formatted (ex: alignment (left-justified, etc.), etc.), then System.out.printf(); would be used.
Check out this link for more information.
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Java loop efficiency ("for" vs. "foreach") [duplicate]
(5 answers)
Closed 8 years ago.
What is very faster, normal {for loop} or {foreach loop} in java ?
They are different first of all. for-each uses Iterator under the hood whereas for is useful for operations on arrays or where you can do something meaningful with indexes.