String[]strArray1={"1","2","3"};String[]strArray2={"4","5","6"};String[]both=Stream.concat(Arrays.stream(strArray1),Arrays.stream(strArray2)).toArray(String[]::new); We can use this technique toconcatenate more than two arrays in a single statement. String[]mergedArray=Stream...
In this tutorial, we will see how to concatenate two arrays in Java. This can be done using different methods depending upon the requirement. In some cases, the user needs to perform duplication as well before merging arrays; as per requirement. ADVERTISEMENT ArrayUtil.addAll() Method to Conc...
In this tutorial we will see how tojoin (or Combine) two ArrayLists in Java. We will be usingaddAll()method to add both the ArrayLists in one finalArrayList. Example: In this example we are merging two ArrayLists in one single ArrayList and then displaying the elements of final List. p...
The simplest way to concatenate two arrays in Java is by using the for loop: int[] arr1 = {1, 2, 3, 4}; int[] arr2 = {5, 6, 7, 8}; // create a new array int[] result = new int[arr1.length + arr2.length]; // add elements to new array int index = 0; for (int...
Consider a scenario where we have an array of students, and we want to add a new student to it. The Arrays.copyOf() method will be employed to gracefully extend the array and include the new student. import java.util.Arrays; public class StudentArrayExample { public static void main(Stri...
2. Merging Two ArrayLists excluding Duplicate Elements To get a merged list minus duplicate elements, we have two approaches: 2.1. UsingLinkedHashSet The JavaSetsallow only unique elements. When we push both lists in aSetand theSetwill represent a list of all unique elements combined. In our...
There are multiple ways to declare and initialize array in java. Using new operator We can declare and initialize array in java using new operator. We don’t have to provide size in this case. 1 2 3 String[] myStrArr = new String[]{"One","Two","Three"}; You can also use varia...
In this tutorial, you will learn how to initialize an ArrayList in Java. There are several different ways to do this. Let's discuss them with examples. 1. Basic (Normal) Initialization One of the ways to initialize an ArrayList is to create it first and
Arrays in Java are of fixed size that is specified when they are declared. To increase the size of the array you have to create a new array with a larger size and copy all of the old values into the new array. ex: //declare an array at firstObject[] myStore=newObject[10]; ...
Thelengthfield is a property of the array object that returns the number of rows in the array. Here is an example of how to get the length of a 2D array in Java: int[][]array={{1,2,3},{4,5,6},{7,8,9}};intnumRows=array.length;intnumColumns=array[0].length;System.out.prin...