12/18/2023 0 Comments Java for loop![]() The syntax of Java for-each loop consists of data_type with the variable followed by a colon (:), then array or collection. It eliminates the possibility of programming errors.This is the first statement that executes in a for loop. Moreover, you cannot traverse the odd or even elements only.īut, it is recommended to use the Java for-each loop for traversing the elements of array and collection because it makes the code readable. The syntax of Java for loop contains 4 parts as mentioned below: initialization It declares and initializes the loop variable. There are three types of loops in Java: while loop for loop do. 2- Iterating an ArrayList of Strings and displaying values. In the code, in each iteration of the for-each loop num variable is assigned the next element of the array nums. Here, you do not have the option to skip any element because it does not work on an index basis. You can easily do this with the help of a loop by repeating the print statement 100 times. 1- Iterating an array using for-each and getting the sum of all the elements in the array. The drawback of the enhanced for loop is that it cannot traverse the elements in reverse order. It is known as the for-each loop because it traverses each element one by one. Before going to each kind of iteration, suppose that we have a List collection as follows: 1. The Java programming language provides four methods for iterating over collections, including for loops, iterator and forEach (since Java 8). ![]() The advantage of the for-each loop is that it eliminates the possibility of bugs and makes the code more readable. Such kinds of operations are very common in programming. It is mainly used to traverse the array or collection elements. It provides an alternative approach to traverse the array or collection in Java. method 2: is using keySet method to get the keys, then using a for loop will go through. method 1: is using entrySet method to get the key:value combination, then using an iterator it will loop through using a while loop. The Java for-each loop or enhanced for loop is introduced since J2SE 5.0. There are several ways to loop through a Map object, the main difference is if you need the keys:values or just the values. ![]() Next → ← prev Java For-each Loop | Enhanced For Loop
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