In this Java program, we are going to look at how to convert lowercase String to uppercase without using any String function. There are requirements where we cannot use any built-in functions. For this conversion, we will make use of ASCII table. Lower Case ASCII Upper Case ASCII a – Read more…
In this article, we will look at how to count the frequency of each vowel in Java. Our goal is to count the number of ‘A’, ‘E’, ‘I’, ‘O’, ‘U’, and also their lower case forms. In the program, we will maintain an array that keeps the count of each Read more…
In this post, we will look at how to replace the first letter of each word with another letter in Java. Logic: Convert str to char array Iterate char array and find the letters whose previous letter is space Replace the letter with the new character Convert char array back Read more…
In this post, we will look at how to convert String to Octet String in Java. Octet string basically means byte array. Program Let’s have a look at the program. Output:
In this post, we will look at how to count the words starting with vowels in Java. We will accept the String and then check if any words start with ‘A’, ‘E’, ‘I’, ‘O’, and ‘U’ or lower case ‘a’, ‘e’, ‘i’, ‘o’, ‘u’. First, we will separate the words Read more…
In this post, we will look at how to print each character of a string in a new line without using loops in Java. Logic: We will make use of recursion to solve this problem. Create a method print Base condition is (str.length() == index), this is the condition when Read more…
In this post, we will look at how to print random characters from a String in Java. Logic: Generate a random index using the Math.random() Convert index to int Find the character at that index from the String and print it Program Let’s have a look at the program. Output:
In this post, we will look at how to accept String using scanner and count the number of special characters in it. Logic: Let’s see how to do it. We classify a character as a special char when, It is not an alphabet, this includes both upper and lower case Read more…
In this post, we will look at how to pass more than 1 parameter to the functional interface using lambda. There is a provision in Java library for passing one or two parameters using an in-built interface, but there are cases where the user wants to pass more than two Read more…
Java 8 Lambda Void argument becomes mandatory even if you don’t want to pass it. In this post, we will look at how to remove it using a helper method in the interface. Let’s see how to call the action method with Void argument v. How to remove the Void Read more…