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2. In detail, how does the 'for each' loop work in Java?

   stackoverflow.com/questions/85190

   The for-each loop, added in Java 5(also called the "enhanced for loop"), is equivalent to using a java.util.Iterator--it's syntactic sugar for the same thing. Therefore, when reading each element, one by one and in order, a for-each should always be chosen over an iterator, as it is more convenient and concise. For-each.

3. java - How do I apply the for-each loop to every character in a...

   stackoverflow.com/questions/2451650

   448. The easiest way to for-each every char in a String is to use toCharArray (): for (char ch: "xyz".toCharArray ()) { } This gives you the conciseness of for-each construct, but unfortunately String (which is immutable) must perform a defensive copy to generate the char [] (which is mutable), so there is some cost penalty.

4. How do I get the current index/key in a "for each" loop

   stackoverflow.com/questions/3431529

   Not possible in Java. Here's the Scala way: val m = List(5, 4, 2, 89) for((el, i) <- m.zipWithIndex) println(el +" "+ i) In Java either you need to run simple "for" loop or use an additional integer to track index, for example : int songIndex = 0; for (Element song: album){. // Do whatever.

5. java - Iterate through a HashMap - Stack Overflow

   stackoverflow.com/questions/1066589

   Method #2: Iterating over keys or values using a For-Each loop. If you need only keys or values from the map, you can iterate over keySet or values instead of entrySet. This method gives a slight performance advantage over entrySet iteration (about 10% faster) and is more clean. Method #3: Iterating using Iterator.

6. loops - Ways to iterate over a list in Java - Stack Overflow

   stackoverflow.com/questions/18410035

   Being somewhat new to the Java language I'm trying to familiarize myself with all the ways (or at least the non-pathological ones) that one might iterate through a list (or perhaps other collections) and the advantages or disadvantages of each. Given a List<E> list object, I know of the following ways to loop through all elements:

7. java - How to iterate over a JSONObject? - Stack Overflow

   stackoverflow.com/questions/9151619

   I use a JSON library called JSONObject (I don't mind switching if I need to).. I know how to iterate over JSONArrays, but when I parse JSON data from Facebook I don't get an array, only a JSONObject, but I need to be able to access an item via its index, such as JSONObject[0] to get the first one, and I can't figure out how to do it.

8. Foreach loop in java for a custom object list - Stack Overflow

   stackoverflow.com/questions/13520571

   You can also use Java 8 stream API and do the same thing in one line. If you want to print any specific property then use this syntax: ArrayList<Room> rooms = new ArrayList<>(); rooms.forEach(room -> System.out.println(room.getName()));

9. java - iterating a linked list - Stack Overflow

   stackoverflow.com/questions/4767615

   I found 5 main ways to iterate over a Linked List in Java (including the Java 8 way): For Loop; Enhanced For Loop

10. Is there a shorter way to write a for loop in Java?

    stackoverflow.com/questions/42077768

    There is a way to write shorter for loop. If "for" loop is the concern, you may find this interesting. for(int i = -1; ++i < max;) {. //do something. } Notice that the counter increment was done before the comparison with max is done. Also notice that the index i starts from -1 instead of normal 0.

11. What is the easiest/best/most correct way to iterate through the...

    stackoverflow.com/questions/196830

    A Java char contains 16 bit and can hold Unicode characters up U+FFFF but Unicode specifies characters up to U+10FFFF. Using 16 bits to encode Unicode results in a variable length character encoding. Most answers on this page assume that the Java encoding is a constant length encoding, which is wrong. –