![]() ![]() This tutorial discussed, with reference to examples, how to convert an ArrayList to array and an array to an ArrayList in Java. ![]() The Java toArray() method is used to convert a list to an array, and the asList() method is used to convert an array to a list. Finally, we print out the message New portfolio:, followed by the contents of the newPortfolio array Conclusion We then assign the new list to the variable newPortfolio. On the next line, we use the Arrays.asList() method to convert the contents of the portfolio array to a list. Then we declare a variable called portfolio which contains an array of the stocks in our retirement portfolio. Let’s break down our code.įirst, we import the Arrays and List packages, which contain the methods we need to convert our array to a list. In this example, we have used asList() to convert our retirement portfolio array called portfolio to a list. Suppose we had an array of stocks in our retirement portfolio which we want to convert into an ArrayList. Let’s return to the retirement portfolio example from earlier. The asList() method is used to convert an array to an ArrayList in Java. Finally, we print out the message Portfolio:, followed by the value returned by Arrays.toString(), to the console. We then use Arrays.toString() to convert the newPortfolio variable to a readable string of values. Next, we use the toArray() method to convert our portfolio ArrayList to an array and assign the newPortfolio array the values stored within the variable portfolio. So, in this case, the newPortfolio array will be capable of holding three values. We set the capacity of the newPortfolio string array - the number of values it can hold - to be equal to the length of the portfolio array. On the next line of our code, we create an array called newPortfolio and initialize the array and the size of the array. ![]() We then use the add() method to add three values to our portfolio: BAM, GOOGL, and SBUX. Then we declare an ArrayList called portfolio which stores string values. The List library allows us to work with the Java List interface, the ArrayList library allows us to work with ArrayLists, and Arrays allows us to use the toString() method to print our array to the console. First, we import three libraries into our program, which are: List, Arrays, and ArrayList. Get Your Coding Bootcamp Sponsored by Your Employer.Education Stipends for Coding Bootcamps.Best Coding Bootcamp Scholarships and Grants.Ultimate Guide to Coding Bootcamp Loans.What Is a Coding Bootcamp Job Guarantee?.Best Free Bootcamps and Coding Training.Best Online Coding Bootcamps and Courses. ![]()
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