Core java

In this post, we will see how to reverse a number in java. Here is simple program to reverse a number. [crayon-6a29b4ed7dabf000431105/] Output: Enter a Number : 4567 Reverse of the number : 7654 Let’s just observe values of variables at the end of each iteration. Iteration 0: number = 4567,remainder = 0, reversedNumber = […]

Runnable and Callable interface both are used in the multithreading environment.Callable is available in java.util.concurrent.Callable package and Runnable in java.lang.Thread. Difference between Runnable and Callable interface in java Runnable was introduced in java 1.0 version While Callable is an extended version of Runnable and introduced in java 1.5 to address the limitation of Runnable. Runnable […]

In this tutorial, we will see how to convert BigInteger to String in java. There are many ways to convert BigInteger to String in java.Some of them are: Using toString() Using String.valueOf() toString method We can simply use BigInteger’s toString method to convert BigInteger to String. [crayon-6a29b4ed7e01f158936069/] When you run above program, you will get […]

In this tutorial, we will see how to convert String to BigInteger in java. It is simple to convert String to BigInteger in java.We can simply use BigInteger’s constructor to convert String to BigInteger. [crayon-6a29b4ed7ef50745462190/] Above constructor convert String representation of BigInteger to BigInteger Let’s see this with the help of example: [crayon-6a29b4ed7ef56111772849/] When you […]

In this tutorial we will see about BigDecimal‘s divide method. BigDecimal’s divide method is used to divide one BigDecimal by another. You can specify scale and rounding mode to get the output according to your need. There are 6 overloaded versions of divide method. Syntax [crayon-6a29b4ed7f501397628369/] Return type returns BigDecimal BigDecimal round example Let’s understand […]

In this tutorial, we will see about BigDecimal‘s round method. BigDecimal’s round method is used to round the BigDecimal based on MathContext setting. Syntax [crayon-6a29b4ed7fa40322441215/] Return type returns BigDecimal rounded with MathContext setting BigDecimal round example Let’s understand BigDecimal method with the help of example [crayon-6a29b4ed7fa47470826818/] Above program will generate below output. 80.23776 is rounded […]

In this tutorial, we will see Java Random nextDouble method.It is used to generate random double. It returns the next pseudorandom, uniformly distributed double value between 0.0 and 1.0 from this random number generator’s sequence. Syntax [crayon-6a29b4ed7ff41757564304/] Here random is object of the java.util.Random class. Return returns random double. Example Let’s understand with the help […]

In this tutorial, we will see Java Random nextInt method.It is used to generate random integer. There are two overloaded versions for Random nextInt method. nextInt() Syntax [crayon-6a29b4ed80416478430026/] Here random is object of the java.util.Random class. Return returns random integer. Example Let’s see a very simple example: [crayon-6a29b4ed8041b780891814/] Output: Random Integer: 1326186546 Random Integer: 203489674 […]

In this tutorial, we will see how to generate random String in java. There are many ways to generate random String.Let’s explore some of ways to generate random String. Using simple java code with Random You can use SecureRandom class to generate random String for you. Let’s understand with the help of example. [crayon-6a29b4ed80963801490851/] Output: […]