FlowerBrackets

March 15, 2017

String toUpperCase() method in java

Let’s learn String toUpperCase() method in java. String toUpperCase() method in java String toUpperCase() method have two variants. String toUpperCase() method in java converts a string to upper case letters. Here’s the String toUpperCase() method example. public class StringToUppercaseDemo { public static void main(String[] args) { String str = “flower brackets”; String strUpper = str.toUpperCase(); System.out.println(strUpper);…

March 15, 2017

Sparse matrix and its representations in java

Let’s learn sparse matrix and its representations in java. What is sparse matrix and its representation? Sparse matrix is a two dimensional array also known as a sparse array. In this matrix majority of elements are zero and very few are non zero elements. For example, consider two rows and three columns matrix. In this…

March 14, 2017

How to sort a string array in java

Let’s learn how to sort a string array in java. How to sort a string array in java Basically String class do not have method to sort string array. So to sort string array we need to match each element of an array to the remaining elements. To do that we are using nested for…

March 14, 2017

Java program to find simple interest

Let’s learn java program to find simple interest. Java program to find simple interest Simple interest is used to enumerate interest on loan in banks. It is calculated by using formula, Simple Interest = (P x R x T) / 100 P – is principal amount. R – is rate per annum. T – is…

March 13, 2017

Selection sort in java

Let’s learn selection sort in java. Selection sort in java In selection sort algorithm smallest element in unsorted array is shifted to its correct position in an array. The number of times sorting takes place will always be one less than the number of integer elements in an array. To select lowest element we need…

March 13, 2017

Reverse string array in java

Let’s learn reverse string array in java. Reverse string array in java Here’s the reverse string array program using for loop. import java.util.Arrays; public class ReverseStringArrayInJava { public static void main(String[] args) { String[] strHierarchy = new String[]{“Junior Developer”,”Senior Developer”,”Team Lead”,”Project Manager”,”Senior Manager”,”CEO”}; System.out.println(“Given string array: ” + Arrays.toString(strHierarchy)); for(int a = 0; a <…

March 10, 2017

How to rename file in java

Let’s learn how to rename file in java. How to rename file in java To rename a file renameTo() method is used of File class. Here’s the syntax of renameTo() method of File class. public boolean renameTo(File dest) renameto method returns true if and only if the renaming is succeeded; false otherwise. Many aspects of…

March 8, 2017

Random number generator in java

Let’s learn random number generator in java. Random number generator in java Let’s learn how to generate random numbers in java using some built in methods and classes. Math.random() method in java Random function in java returns pseudo random double greater than or equal to 0.0 and less than 1.0. Math.random() method uses Random class…

March 7, 2017

Java program to delete vowels in a given string

Let’s learn java program to delete vowels in a given string. Java program to delete vowels in a given string In the below program to delete vowels in a given string first given string is stored in String variable ‘str’ as input. Then replaceAll() method replaces each substring of this string that matches given regular…

March 6, 2017

Quicksort in java

Let’s learn quicksort in java. Quicksort in java Basically quicksort is a divide and conquer algorithm. Quicksort is one of the widely used sorting algorithm. Because it is used to sort large datasets or lists. Quicksort in java implementation Below are steps on quicksort algorithm java. Given an array of numbers we want to sort…