Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from https://www.tutorialspoint.com/java/java_foreach_loop.htm below:

Java - for each Loop

A for each loop is a special repetition control structure that allows you to efficiently write a loop that needs to be executed a specific number of times.

A for each loop is useful even when you do not know how many times a task is to be repeated.

Following is the syntax of enhanced for loop (or, for each loop) −

for(declaration : expression) {
   // Statements
}

• Declaration − The newly declared block variable, is of a type compatible with the elements of the array you are accessing. The variable will be available within the for block and its value would be the same as the current array element.

• Expression − This evaluates to the array you need to loop through. The expression can be an array variable or method call that returns an array.

In this example, we're showing the use of a foreach loop to print contents of an List of Integers. Here we're creating an List of integers as numbers and initialized it some values. Then using foreach loop, each number is printed.

import java.util.Arrays;
import java.util.List;

public class Test {

   public static void main(String args[]) {
      List<Integer> numbers = Arrays.asList(10, 20, 30, 40, 50);

      for(Integer x : numbers ) {
         System.out.print( x );
         System.out.print(",");
      }
   }
}

10, 20, 30, 40, 50,

In this example, we're showing the use of a foreach loop to print contents of an List of String. Here we're creating an array of Strings as names and initialized it some values. Then using foreach loop, each name is printed.

import java.util.Arrays;
import java.util.List;

public class Test {

   public static void main(String args[]) {
      List<String> names = Arrays.asList("James", "Larry", "Tom", "Lacy");

      for( String name : names ) {
         System.out.print( name );
         System.out.print(",");
      }
   }
}

James, Larry, Tom, Lacy,

In this example, we're showing the use of a foreach loop to print contents of an array of Student Object. Here we're creating an array of Students as Student object and initialized it some values. Then using foreach loop, each name is printed.

public class Test {

   public static void main(String args[]) {
      Student[] students = { new Student(1, "Julie"), new Student(3, "Adam"), new Student(2, "Robert") };

      for( Students student : students ) {
         System.out.print( student );
         System.out.print(",");
      }
   }
}
class Student {
   int rollNo;
   String name;

   Student(int rollNo, String name){
      this.rollNo = rollNo;
      this.name = name;
   }

   @Override
   public String toString() {
      return "[ " + this.rollNo + ", " + this.name + " ]";
   }
}

[ 1, Julie ],[ 3, Adam ],[ 2, Robert ],

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4