The foreach keyword in java?

Question

I know the meaning of foreach in programming and when to use it. Is there a foreach keyword in Java? I tried to find a list of keywords, but there is only for , not foreach .

Answer 1

foreach is not a java keyword (the IDE recognizes it and puts a For-each loop. "

Answer 2

As far as I know, Java does not have the foreach keyword (unlike C #, if I'm not mistaken). However, you can iterate over all the elements in the Iterable collection using a modified version of the for loop:

 List<String> list = new ArrayList<String>(); ... for (String str : list) { System.out.println(str); } 

For more information see this link.

Answer 3

Starting with Java 1.8, Java now has a foreach loop ...

 package org.galarik.arick; import java.util.ArrayList; import java.util.List; public class ExampleForEach { public static void main(String[] args) { List<String> strings = new ArrayList<>(); strings.add("Mom"); strings.add("Dad"); strings.add("Dad Java"); strings.add("Mom Java"); // Original for loop int stringsSize = strings.size(); Object[] oldStrings = strings.toArray(); for(int stringIndex = 0; stringIndex < stringsSize; ++stringIndex ) { System.out.println("Original Content: " + oldStrings[stringIndex]); } // For loop, as of Jova 1.5 for (String string : strings) { System.out.println("All Content: " + string); } // forEach loop as of Java 1.8 strings.stream().forEach((string) -> { System.out.println("For Content: " + string); }); // Using forEach loop to do a filter strings.parallelStream().filter(someString -> someString.contains("Java")) .forEach((someOtherString) -> { System.out.println("Content With Java: " + someOtherString); }); } } 

Answer 4

No, the keyword is missing foreach . And I just wanted to add that an extended loop was added only for coding convenience. The compiler returns it to the old java format. How:

  List<String> list = new ArrayList<String>(); for (String str : list) { System.out.println(str); } 

Will be converted to:

  List list = new ArrayList(); String str; for(Iterator iterator = list.iterator(); iterator.hasNext(); System.out.println(str)) { str = (String)iterator.next(); } 

Answer 5

Not. To make "foreach", you write for( Type variable : collection ){ .... }

(Yes, I know that it should not be Collection , just Iterable or an array - I'm just trying to write clearly)

Answer 6

NOT. foreach not a keyword in Java.

The foreach is a simple syntax to iterate through arrays or collections - an implementation of the java.lang.Iterable interface.

In Java, the for keyword and operator : are used to create a foreach .

 // Java example String[] oddBalls = {"one", "three", "five", "seven"}; for (String currentBall : oddBalls) { System.out.println (currentBall + " is an odd number."); } 

The main for loop has been extended in Java 5 to make iterating through arrays and other collections more convenient. This new for statement is called enhanced for or foreach .