Java, an independent-platform programming language is widely preferred by developers and designers. Several features and factors like compatibility, versatility, multi-features, meticulous documentation, open sources/free libraries, huge support community, and user-friendliness make it one popular programming language.
Learning Java is important for IT industry aspirants seeking better opportunities as Java comes in handy in the software field. Designing and developing web applications and mobile applications have been made with ease using Java.
Despite flexibility being one of the key highlights of Java, beginners may find challenges in learning Java. Java codes make it quite challenging in terms of syntax structures and avoiding errors in strings and numerical.
Given below are a few code challenges for beginners in both strings and numerical. Improve your skills by trying these challenges and practicing more.
i) Word search
If the string begins with an input word given, return a Boolean TRUE. Hence, for an input string of “welcome back” with the input word “welcome”, Boolean TRUE will be returned by the program. Create a program for advanced word search which returns the number of times a word is displayed in an input string. As an example, an input word “welcome” with an input string “They are welcome welcomet,”, a value of 2 will be returned by the program.
ii) Pangrams
A sentence that consists of all 26 letters of the English alphabet is called a pangram. For example, “The five boxing wizards jump quickly”. Create a checker for pangram which returns a Boolean FALSE if the given input string is not a pangram and TRUE if it is. Create a perfect pangram checker as a challenge by checking the sentence that makes use of each letter of the alphabet only once in a sentence. For example, “Jock nymphs waqf drug vex blitz”.
iii) Anagrams
If two words contain the same letters but in a different order is called an anagram. Few examples for anagram pairs are: “players” and “parsley”, “dusty” and “study”, “sadder” and “dreads” etc. Create a checker for anagram which returns a Boolean FALSE if the given two input strings are not an anagram and TRUE if it is. To make it more challenging, try an array of strings where separate lists that group anagrams together are returned. If the input { “acre,” “care,” “race,” “misread,” “sidearm”}, the output should appear as {[“acre,” “care,” “race”],[“misread,” “sidearm”]}.
iv) Armstrong numbers
A whole number that is equal to the sum of its digits raised to the power of the total number of digits is called an Armstrong number. For example, the three-digit number 370 is an Armstrong number (370 = 3^3 + 7^3 + 0^3). 1634, the four-digit number is also an Armstrong number (1634 = 1^4 + 6^4 + 3^4 + 4^4). An Armstrong number checker can be created by extracting each digit from a number assigned by using the modulo/remainder operator to see if it returns a Boolean TRUE. A calculator to find an Armstrong number can be created which returns all the Armstrong numbers between 0 and the number given as input.
v) Prime number checker
Any whole number greater than 1 whose only factors are 1 and itself is called a prime number. For example, as 5 is divisible only by 1 and 5, 5 is a prime number. 2,3,5,7,11,13,17 and 19 are the first few prime numbers. Try creating a program that returns TRUE indicating that the input number given is a prime number. As a challenge, a calculator for prime number can be created that gives outputs all the prime numbers between 2 and the input number given.
Make learning Java an interesting process!
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