Learn Java by Solving Coding Problems

This lecture dissects the fundamental components that comprise a Java program, offering a step-by-step exploration of its structure, syntax, and execution flow.

In this challenge, we practice printing to stdout.

Welcome to the world of Java! In this challenge, we practice printing to stdout. The code stubs in your editor declare a Solution class and the main method.

Problem 3: If - Else Statements in Java

In this challenge, we test your knowledge of using if-else conditional statements to automate decision-making processes.

This video demonstrates creating a program containaing an if-else conditional statements to automate decision-making processes.

In this challenge, we will use loops to help us do some simple math.

In this challenge, we will use loops to print the first 10 multiples of a given Integer N.

Learn about data types in Java.

Problem: Static Initializer Block.

Solution: Static Initializer Block.

In this challenge, we will learn about Strings in Java.

Problem: Converting Integer to String.

In this challenge, you must read integers from stdin and print them to stdout. Each integer must be printed on a new line. To make the problem a little easier, a portion of the code is provided for you in the editor.

In this challenge, you must read integers from stdin and print them to stdout.

This program reads integers from stdin and then prints them to stdout. You will learn how to run, fix compilation errors and run test cases while submitting your code. You will also learn about how to unlock a test case in HackrRank.

In this challenge, you must read an integer, a double, and a String from stdin, then print the values according to the instructions in the Output Format section below. To make the problem a little easier, a portion of the code is provided for you in the editor.

Note: We recommend completing the problem Java Stdin and Stdout I before attempting this challenge.

Learn how to instruct the scanner to skip any text that is preceded by a carriage return, new line character, whitespaces.

In this challenge, you must read an integer, a double, and a String from stdin, then print the values according to the instructions in the Output Format section below. To make the problem a little easier, a portion of the code is provided for you in the editor.

Note: We recommend completing the problem Java Stdin and Stdout I before attempting this challenge.

Java's System.out.printf function can be used to print formatted output. The purpose of this exercise is to test your understanding of formatting output using printf.

To get you started, a portion of the solution is provided in the editor; you must format and print the input to complete the solution.

Java's System.out.printf function can be used to print formatted output. The purpose of this exercise is to test your understanding of formatting output using printf.

Reading Input until End of File.

In this problem, we will be reading Input until the end of the file.

Problem: Working with Date and Time.

Solution: Working with Date and Time.

Problem 11: Currency Formatting.

Given a double-precision number denoting an amount of money, use the getCurrencyInstance method of the NumberFormat class to convert into the US, Indian, Chinese, and French currency formats.

Transcript

Hello everyone. In this video, we'll solve a Java practice challenge from HackerRank. This is the last one. It's called a Java currency formatter. Let's look into the problem. So the problem is, given an input, which is a double precision number, it has a payment value that is in the range of 0 to 10 to power nine. And this has to be outputted into the various format as per US currency format, Indian currency format, Chinese currency format, and French, respectively. There is simple input, which is one, two, 3 to 4.13, four. And these are various sample outputs. We have. Some code is available for us. There is a template, and in the template, there is code for reading the input and displaying it. What we need to do is we need to format it. So here, we have to insert the code to format it. Now to do this, we need to create some string variables to store these values. And we have locale and various locales which is available. So to format them. Let's use them. So let's say new local get currency. So, let's look into the local.Java document. And in this, we have details about how to create a local. So here we see. Locale could be created by passing the constant, which represents the country for which it has to be formatted. So here, number four might get currency instance, and then it can take a locale which could be the locale of the country in which the formatting has to be done. So here, the way to use it is NumberFormat.getCurrencyFormat(), And in this, we have to pass the locale for us. So Locale.US, and then we have to say format() and pass payment. Okay, the same way we can do for other countries as well. So here we have India, we have China, and we have France. So we just changed for China. I will look into the code. You know, we have this China locale and.US locale. And for France, we have France locale. And there is no locale for India. So we have to create a new locale. So let me. Put this for China, and this is for France. For India, we have to create a locale. So a new locale could be created like Locale indiaLocale new Locale, and we pass "en" for the language English and the Country Code "IN."In this way, we can create a local. And then, I will update this. Now let's see. Running this gives the required output. So here we see there is this cannot find symbol number format. And to resolve this. We hear it's NumberFormat.So yeah, there is a slight typo.So here it should be getCurrencyInstance() instead of getCurrencyFormat().So I'll just replace this with the getCurrencyInstance(), which should resolve the compilation error. So I've just updated this. Now we have various strings India, US, China, and France, and they contain respective formatting of the currency. So let's see if we run this code, what we get, and yet it returns. Various currencies in the format as per the requirement. So this looks good. Let's submit this code and run it against other test cases. So this completes this challenge, and all the test cases are passed. Thank you this much for this challenge. See you in the next video.

In this challenge, we will learn how to use Generics in Java

In this challenge, we will learn about Stack data structure in Java.

In this challenge, we will learn about Collections.sort() method in Java

In this challenge, we will learn about Dequeue data structure method in Java