In this tutorial, I am going to share with you a few different techniques you can use to iterate over a collection in Java.Iterating ArrayList with Enhanced For-LoopList<String> names = new ArrayList<>(); names.add("Sergey"); names.add("Bill"); names.add("John"); for(String name:...
This could come in handy in scenarios where you want to perform some operations on data within a map. By using the entrySet() method – which returns a list – it is possible to have an iterator over a map. See the following example to understand how this works: import java.util.*; ...
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TheforEach()method was added to theIterableinterface in Java 8. So all the java collection classes have implementations of aforEach()method. In order to use these with anEnum, we first need to convert theEnumto a suitable collection. We can useArrays.asList()to generate anArrayList,which ...
Java 1.5 provides an even quicker approach using an enhanced "for" loop: for(Object item : list){ System.out.println(item); } (See "The for Statement" inThe Java Tutorials, and the official specifics on these language features in theJava Language Specification, both from Sun Microsystems.)...
import java.util.Arrays; // Define a class named Exercise8. public class Exercise8 { // The main method where the program execution starts. public static void main(String[] args) { // Declare and initialize an integer array 'my_array'. int[] my_array = {25, 14, 56, 15, 36, 56...
I have a custom field which is of multi select and it stores only the key. In order to fetch the value I'm writing a listener event during creation and updating event where the key will be converted from string to list and then iterating the list to get the summary. The summary is ...
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UReport2 is a high-performance pure Java report engine based on Spring architecture, where complex Chinese-style statements and reports can be prepared by iteraing over cells. UReport2 provides the brand new web-based report designer that runs in mainstream browsers including Chrome, Firefox and Ed...