Java String Exercises: Concatenate a given string to the end of another string

Java String: Exercise-7 with Solution

Write a Java program to concatenate a given string to the end of another string.

Pictorial Presentation:

Java String Exercises: Concatenate a given string to the end of another string

Sample Solution:

Java Code:

public class Exercise7 {

    public static void main(String[] args)
        String str1 = "PHP Exercises and ";
        String str2 = "Python Exercises";
        System.out.println("String 1: " + str1);
        System.out.println("String 2: " + str2); 

        // Concatenate the two strings together.
        String str3 = str1.concat(str2);

        // Display the new String.
        System.out.println("The concatenated string: " + str3);

Sample Output:

String 1: PHP Exercises and                                                                                   
String 2: Python Exercises                                                                                    
The concatenated string: PHP Exercises and Python Exercises


Flowchart: Java String  Exercises - Concatenate a given string to the end of another string

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Java Code Editor:

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Java: Tips of the Day

Array vs ArrayLists:

The main difference between these two is that an Array is of fixed size so once you have created an Array you cannot change it but the ArrayList is not of fixed size. You can create instances of ArrayLists without specifying its size. So if you create such instances of an ArrayList without specifying its size Java will create an instance of an ArrayList of default size.

Once an ArrayList is full it re-sizes itself. In fact, an ArrayList is internally supported by an array. So when an ArrayList is resized it will slow down its performance a bit as the contents of the old Array must be copied to a new Array.

At the same time, it's compulsory to specify the size of an Array directly or indirectly while creating it. And also Arrays can store both primitives and objects while ArrayLists only can store objects.

Ref: https://bit.ly/3o8L2KH