Welcome to the World of Online Learning:
Hello Friends “This blog helps you to learn Java programming concepts. You can learn Java language at your own speed and time. One can learn concepts of Java language by practicing various programs given on various pages of this blog. Enjoy the power of Self-learning using the Internet.”
Write a Java Program to Convert the ArrayList into a string and vice versa
PROGRAM: Java Program to Convert the ArrayList into a string and vice versa
/*Java Program to Convert the ArrayList into a string and vice versa*/
1: Convert the Arraylist into a String
import java.util.ArrayList;
class Main {
public static void main(String[] args) {
ArrayList<String> languages= new ArrayList<>();
// Add elements in the array list
languages.add(“Java”);
languages.add(“Python”);
languages.add(“JavaScript”);
System.out.println(“ArrayList: ” + languages);
// convert the arraylist into a string
String arraylist = languages.toString();
System.out.println(“String: ” + arraylist);
}
}
2: Convert ArrayList to String Using join()
import java.util.ArrayList;
class Main {
public static void main(String[] args) {
ArrayList<String> languages= new ArrayList<>();
// Add elements in the array list
languages.add(“Java”);
languages.add(“Python”);
languages.add(“JavaScript”);
System.out.println(“ArrayList: ” + languages);
// convert the arraylist into a string
String arraylist = String.join(“, “, languages);
System.out.println(“String: ” + arraylist);
}
}
3: Convert a String to ArrayList
import java.util.ArrayList;
import java.util.Arrays;
class Main {
public static void main(String[] args) {
// create a string
String str = “Java, JavaScript, Python”;
System.out.println(“String: ” + str);
// convert the string into an array
String[] arr = str.split(“,”);
// create an arraylist from the string
ArrayList<String> languages = new ArrayList<>(Arrays.asList(arr));
System.out.println(“ArrayList: ” + languages);
}
}
