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January 11, 2017

Garbage collection in java

Let’s learn garbage collection in java. Garbage collection in java Garbage collection means destroying or de-allocating unused objects in memory. Objects which are not used or has no references can be reclaimed. Garbage collector is used to reclaim unused memory automatically. Java handles memory de-allocation automatically since object once created uses some memory in the…

January 10, 2017

for loop in java

Let’s learn for loop in java. for loop in java for loop is used to iterate a block of statements multiple times. Use for loop if you know the number of iteration is fixed. Here are three types of loops in java with example, while loop do while loop for loop Loops in java executes…

January 10, 2017

Java program to print Floyd’s triangle

Let’s learn java program to print Floyd’s triangle. Java program to print Floyd’s triangle floyd triangle in java is one of the common java interview question. First let’s learn what is floyd’s triangle in java. Floyd triangle is a right angled triangle of array of natural numbers starting with 1 in the top left corner.…

January 6, 2017

Factorial program in java

Let’s learn factorial program in java. Factorial program in java factorial of a number in java or factorial in java is one of the common java interview question. Factorial is the product of all integers less than or equal to given number. Denoted as n! For example, 6! = 6 * 5 * 4 *…

January 4, 2017

Java program to check even or odd number

Let’s learn java program to check even or odd number. Java program to check even or odd number In the below even odd program in java first user enters a number as input using nextInt() method of Scanner class. This number is stored in integer variable ‘a’. Now this user entered number is divided by…

January 3, 2017

Java program to find IP address of a system

Let’s learn java program to find IP address of a system . Java program to find IP address of a system An IP address is an identifier allocated to computer and connected to TCP/IP network. If you see an IP address in detail you will notice that it’s basically four numbers separated by dots like…

January 3, 2017

Java program to delete specified integer from an array

Let’s learn java program to delete specified integer from an array. Java program to delete specified integer from an array Delete specified integer from an array in java is one of the common interview question. In the below java program first user enters elements and size of the array using nextInt() method of Scanner class.…

January 2, 2017

How to delete a directory in java

Let’s learn how to delete a directory in java. How to delete a directory in java To delete a directory use delete() method of File class. delete() method deletes file or directory denoted by this abstract pathname. If this pathname denotes a directory, then the directory must be empty in order to be deleted. delete()…

January 2, 2017

Java convert decimal to octal

Let’s learn java convert decimal to octal. Java convert decimal to octal decimal to octal in java is one of the frequently asked interview question. In the below example we need to convert given decimal number (base value 10) into octal number (base value 8). To represent numeric value decimal number system uses 0-9 digits…

January 2, 2017

Java convert decimal to hex

Let’s learn java convert decimal to hex. Java convert decimal to hex decimal to hexadecimal in java is one of the common java interview question. In number system, decimal number has a base of ten and has digits from 0 to 9. Whereas hexadecimal number has a base 16 and has digits from 0 to…