For Each loop in Java

The 1.for each statement is one of the new features of Java 5 and provides a great convenience in iterating through collections and arrays.

The 2.for each statement is a special simplified version of the for statement, but the for every statement does not completely replace the For statement, however, any for each statement can be rewritten as a version of the for statement.

3.for Each statement format:

For (element data type element variable: Traverse object)

{

Loop body Content

}

Import Java.util.Arrays;   Import java.util.List;     Import java.util.ArrayList;            public class Testarray {public static void main (String args[]) {testarray test = new Testarray ();            Test.test1 ();            Test.listtoarray ();          Test.testarray3 ();  }/** * foreach statement output one-dimensional array */public void test1 () {//define and initialize an array int arr[] = {2,            3, 1};           SYSTEM.OUT.PRINTLN ("----1----one-dimensional array before sorting"); for (int x:arr) {System.out.println (x);//Output The value of the array element individually}//Sort the Arrays of the arrays.             Sort (arr);           Using the new Java feature for Each loop output array System.out.println ("----1----one-dimensional array after sorting");        for (int x:arr) {System.out.println (x);//Output The value of the array element individually}}/** * Collection converted to a one-dimensional array */public void Listtoarray () {//Create list and add element list<string> list = new Arraylist<s            Tring> (); List.add ("1");            List.add ("3");             List.add ("4");           Use the Froeach statement to output the collection element System.out.println ("----2----froeach statement output set element");            for (String x:list) {System.out.println (x);             }//Convert ArrayList to an array of Object s[] = List.toarray ();           Use the Froeach statement to output the collection element System.out.println ("----2----The Froeach statement output set of the array elements converted from the");       for (Object x:s) {System.out.println (x.tostring ());//Output The value of the array element individually}}/**            * foreach output two-dimensional array test */public void TestArray2 () {int arr2[][] = {{4, 3}, {1, 2}};           SYSTEM.OUT.PRINTLN ("----3----foreach output two-dimensional array test");                for (int x[]: arr2) {for (int e:x) {System.out.println (e);//output values of array elements individually }}}/** * foreach output three-dimensional array */public void TestArray3 () {int arr[][        [] = {{{1, 2}, {3, 4}},            {{5, 6}, {7, 8}}};           SYSTEM.OUT.PRINTLN ("----4----foreach output three-dimensional array test"); For (int[][] A2:arr) {in (int[] a1:a2) {for (int x:a1) {S                    YSTEM.OUT.PRINTLN (x); }                }            }        }   }

　　

For Each loop in Java