Converting a List into comma separated value string in Java By Mohamed Sanaulla on May 7, 2013 • ( 5 Comments ) We all have at least once in our coding life time done this: “Concatenate the elements of a List into a comma separated string”. For exmaple, if the user input is 12345678 the code will print out 12345,678. The java.io package includes a PrintStream class that has two formatting methods that you can use to replace print … Java Program to add comma into numbers Here is our complete Java example to format numbers and add commas into them. Right now it prints out one comma for the first set of 3 numbers. You code is not properly indented and IMO your comments don't add any value. I'm trying to figure out how to get it to print out commas for the rest of the numbers. Printing numbers with and without the + flag: 6.14.54. Thanks to everyone for their replies. How do I print an array without the brackets and commas? I have built off of some of the answers to make a more “one-size-fits-all” solution. This Java program is the same as the first example. I have seen many examples on Google, but I am looking for the simplest practical way. Using the # flag with conversion characters o and x: 6.14.56. In this article we'll see how Python program can be used to insert a comma at a suitable place. This will format … Still, we separated the prime numbers logic and placed it in a separate method. The toLocaleString() method is used to return a string with a language-sensitive representation of a number. Printing with the 0 (zero) flag fills in leading zeros: 6.14.57. The array contains slashes and gets replaced one-by-one when the correct letter is guessed. Printing a space before non-negative values: 6.14.55. The printf and format Methods. I am using the usual .toString() function of the ArrayList class and my output is formatted like: [ a, n, d, r, o, i, d ]. The locale ‘en-US’ is used to specify that the locale takes the format of the United States and the English language, where numbers are represented with a comma between the thousands. The Java programming language has other methods, however, that allow you to exercise much more control over your print output when numbers are included. Display numbers with commas Tag(s): String/Number JDK1.5+ System.out.println() directly supports formatting so it's possible to give a known Locale (with the right decimal separator) to … I've almost got this to work. Also you could add an extra parameter so you can specify the delimiter instead of always being ",". Java Program to display Prime Numbers from 1 to N using Method. If I am formatting a number, I usually want decimal places so the function takes in the number of decimal places to show. Many times the numbers with three or more digits need to be represented suitably using comma. For example, I want to show the number 1234567 as 1,234,567.How would I go about doing this? The first snippet adds a function that mimics PHP‘s number_format() to the Number prototype. I want it to simply print out the array as a single String. text formatting, I suggest to take a look at Java: A Beginner's Guide by Herbert Schildt, a must read the book for Java beginners. The optional locales parameter is used to specify the format of the number. If you are a beginner in Java and interested in learning essential features e.g. Also if you can use java 8 this becomes even more trivial: Using the comma (,) flag to display numbers with thousands separator… I am trying to print an integer in Python 2.6.1 with commas as thousands separators. Print Out Commas For Numbers Oct 27, 2014. This is a requirement mainly in the accounting industry as well as in the finance domain. You could create a separate function instead of putting everything in the main function. 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