Algorithm
-
import java.util.ArrayList;: Imports the ArrayList class from the java.util package.
import java.util.List;: Imports the List interface from the java.util package.
import java.util.Arrays;: Imports the Arrays class from the java.util package.
public class StringtoArrayList {: Defines a class named StringtoArrayList.
public static void main(String args[]){: The entry point of the program, where execution begins.
String strings = "99,42,55,81,79,64,22";: Defines a string named strings containing a comma-separated list of numbers.
String str[] = strings.split(",");: Splits the strings string into an array of strings using "," as the delimiter.
List nl = new ArrayList();: Creates an ArrayList named nl. Note that the type is not specified for nl, so it can hold any type of object.
nl = Arrays.asList(str);: Converts the array str into a fixed-size list and assigns it to the nl ArrayList.
for(String s: nl){: Iterates over each element in the ArrayList.
System.out.println(s);: Prints each element of the ArrayList on a new line.
Code Examples
#1 Java programing is used to strings into ArrayList.
Code -
Java Programming
import java.util.ArrayList;
import java.util.List;
import java.util.Arrays;
public class StringtoArrayList {
public static void main(String args[]){
String strings = "99,42,55,81,79,64,22";
String str[] = strings.split(",");
List nl = new ArrayList();
nl = Arrays.asList(str);
for(String s: nl){
System.out.println(s);
}
}
}Output
42
55
81
79
64
22
#2 Example to get an Arraylist from a string
Code -
Java Programming
import java.util.ArrayList;
import java.util.Arrays;
public class Main {
public static void main(String[] args){
String msg = "StudyTonight.com/tutorial/java/string";
System.out.println(msg);
// string to ArrayList
ArrayList<String> list = new ArrayList < >(Arrays.asList(msg.split("/")));
list.forEach(System.out::println);
}
}Output
StudyTonight.com
tutorial
java
string
#3 Eaxmple-directly pass this array into asList() method to get ArrayList
Code -
Java Programming
import java.util.ArrayList;
import java.util.Arrays;
public class Main {
public static void main(String[] args){
String[] msg = {"StudyTonight.com","tutorial","java","string"};
System.out.println(msg.length);
// string[] to ArrayList
ArrayList<String> list = new ArrayList < >(Arrays.asList(msg));
list.forEach(System.out::println);
}
}Output
StudyTonight.com
tutorial
java
string
Demonstration
Java program to Convert String to ArrayList-DevsEnv