$show=/label

Java Program To Convert String to ArrayList Using Arrays.asList()

SHARE:

Explanation with a Java Program To Convert String to ArrayList Using Arrays.asList(). Java Example to Arrays.asList()

1. Overview


In this ArrayList articles series, You'll be learning today how to convert a String into an ArrayList using java built-in methods. There are many scenarios in the real-time applications where we need to do transform the string into a list of objects. Typically string should be multiple values separated by a delimiter. For example take a String like "Started,Approved,In Progress,Completed". Here we are seeing the statues in string format and all these statuses are for processing the tickets raised by the users. This is the status flow. We need to now convert this string into a List<String>.


Java Program To Convert String to ArrayList Using Arrays.asList()


Note: String can have integers, double and strings values with a delimiter. The same below shown program works for any type of values present in the input string.

2. Write a program to convert String to ArrayList in Java


The below process and program are used to demonstrate to convert comma-separated values into ArrayList.

String allStatus = "Started,Approved,In Progress,Completed";

Notice that string has ',' delimiter which is separating each status. So, we can say comma as a delimiter here. String API has a method split() which takes a regex to match the pattern and split values. After successful split, split() method returns a string array String[]. This returned String[] array holds the values. Now, the last step is to convert this String array into a List using Arrays.asList() method. asList() is a static method so we can call directly with the class name.

package com.javaprogramto.engineering.programs;

import java.util.Arrays;
import java.util.List;

/**
 * 
 * Java Program To Convert String to ArrayList Using Arrays.asList()
 * 
 * @author javaprogramto.com - Venkatesh
 *
 */
public class StringToArrayList {

    public static void main(String[] args) {

        String allStatus = "Started,Approved,In Progress,Completed";

        System.out.println("string : " + allStatus);
        // spliting by comma
        String[] statusArray = allStatus.split(",");

        // converting string array to list
        List statusList = Arrays.asList(statusArray);

        // Iterating list of strings using for-each.
        System.out.println("Converted List values are : ");
        for (String status : statusList) {
            System.out.println(status);
        }

    }

}

Output:

string : Started,Approved,In Progress,Completed
Converted List values are : 
Started
Approved
In Progress
Completed

Converted List<String> is printed using a for-each concept.

This can be done using Java 8 for each in a single line as below and will produce the same result. The order also preserved from String.

statusList.forEach(status -> System.out.println(status));

3. Conclusion


In this article, we've learned about how to convert comma-separated values into an ArrayList. The string can be having any delimiter such as #, *,  !, | or @. For all of these delimiters should be passed to the split() method then next is to call Arrays.asList() method.

COMMENTS

BLOGGER

About Us

Author: Venkatesh - I love to learn and share the technical stuff.
Name

accumulo,1,ActiveMQ,2,Adsense,1,API,37,ArrayList,18,Arrays,24,Bean Creation,3,Bean Scopes,1,BiConsumer,1,Blogger Tips,1,Books,1,C Programming,1,Collection,8,Collections,37,Collector,1,Command Line,1,Comparator,1,Compile Errors,1,Configurations,7,Constants,1,Control Statements,8,Conversions,6,Core Java,149,Corona India,1,Create,2,CSS,1,Date,3,Date Time API,38,Dictionary,1,Difference,2,Download,1,Eclipse,3,Efficiently,1,Error,1,Errors,1,Exceptions,8,Fast,1,Files,17,Float,1,Font,1,Form,1,Freshers,1,Function,3,Functional Interface,2,Garbage Collector,1,Generics,4,Git,9,Grant,1,Grep,1,HashMap,2,HomeBrew,2,HTML,2,HttpClient,2,Immutable,1,Installation,1,Interview Questions,6,Iterate,2,Jackson API,3,Java,32,Java 10,1,Java 11,6,Java 12,5,Java 13,2,Java 14,2,Java 8,128,Java 8 Difference,2,Java 8 Stream Conversions,4,java 8 Stream Examples,12,Java 9,1,Java Conversions,14,Java Design Patterns,1,Java Files,1,Java Program,3,Java Programs,114,Java Spark,1,java.lang,4,java.util. function,1,JavaScript,1,jQuery,1,Kotlin,11,Kotlin Conversions,6,Kotlin Programs,10,Lambda,2,lang,29,Leap Year,1,live updates,1,LocalDate,1,Logging,1,Mac OS,3,Math,1,Matrix,6,Maven,1,Method References,1,Mockito,1,MongoDB,3,New Features,1,Operations,1,Optional,6,Oracle,5,Oracle 18C,1,Partition,1,Patterns,1,Programs,1,Property,1,Python,2,Quarkus,1,Read,1,Real Time,1,Recursion,2,Remove,2,Rest API,1,Schedules,1,Serialization,1,Servlet,2,Sort,1,Sorting Techniques,8,Spring,2,Spring Boot,23,Spring Email,1,Spring MVC,1,Streams,31,String,61,String Programs,28,String Revese,1,StringBuilder,1,Swing,1,System,1,Tags,1,Threads,11,Tomcat,1,Tomcat 8,1,Troubleshoot,26,Unix,3,Updates,3,util,5,While Loop,1,
ltr
item
JavaProgramTo.com: Java Program To Convert String to ArrayList Using Arrays.asList()
Java Program To Convert String to ArrayList Using Arrays.asList()
Explanation with a Java Program To Convert String to ArrayList Using Arrays.asList(). Java Example to Arrays.asList()
https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjMqpkO2FveX-cBJ8VMyckwW1g9G4Lu_Gb-5sb56CX6zFTEA9u1g-7v_Rx2w6PyeRc_18zGMjVEe12CkW4E46gVwAOgoQcJZiJxtQ138ZS0vJLsZY7-22-XmKHMfjS0AKS3aDTmgfhjO7A/s400/Java+Program+To+Convert+String+to+ArrayList+Using+Arrays.asList%2528%2529.png
https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjMqpkO2FveX-cBJ8VMyckwW1g9G4Lu_Gb-5sb56CX6zFTEA9u1g-7v_Rx2w6PyeRc_18zGMjVEe12CkW4E46gVwAOgoQcJZiJxtQ138ZS0vJLsZY7-22-XmKHMfjS0AKS3aDTmgfhjO7A/s72-c/Java+Program+To+Convert+String+to+ArrayList+Using+Arrays.asList%2528%2529.png
JavaProgramTo.com
https://www.javaprogramto.com/2019/12/java-program-convert-string-to-arraylist.html
https://www.javaprogramto.com/
https://www.javaprogramto.com/
https://www.javaprogramto.com/2019/12/java-program-convert-string-to-arraylist.html
true
3124782013468838591
UTF-8
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS PREMIUM CONTENT IS LOCKED STEP 1: Share to a social network STEP 2: Click the link on your social network Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy Table of Content