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Articles on Trending Technologies
Technical articles with clear explanations and examples
Extracting MAC address using Python
We know that the MAC address is a hardware address which means it is unique for the network card installed on our PC. It is always unique that means no two devices on a local network could have the same MAC addresses. The main purpose of MAC address is to provide a unique hardware address or physical address for every node on a local area network (LAN) or other networks. A node means a point at which a computer or other device (e.g. a printer or router) will remain connected to the network. Method1 Using uuid.getnode() In this example getnode() ...
Read MoreJava Program to concatenate a String and Integers
To concatenate a String and some integer values, you need to use the + operator. Let’s say the following is the string. String str = "Demo Text"; Now, we will concatenate integer values. String res = str + 1 + 2 + 3 + 4 + 5; The following is the final example. Example public class Demo { public static void main(String[] args) { String str = "Demo Text"; System.out.println("String = "+str); String res = str + 1 + 2 + 3 + 4 + 5; System.out.println(res); } } Output String = Demo Text Demo Text12345
Read MoreModify Date and Time from GregorianCalendar in Java
For GregorianCalendar class, import the following package.import java.util.GregorianCalendar;Firstly, let us display the current date and time.GregorianCalendar cal = (GregorianCalendar) GregorianCalendar.getInstance(); System.out.println("Current date: " + cal.getTime());Now, modify the date. Here we are adding two days to the month using the add() method.cal.add((GregorianCalendar.MONTH), 2);Exampleimport java.util.Calendar; import java.util.GregorianCalendar; public class Demo { public static void main(String[] a) { GregorianCalendar cal = (GregorianCalendar) GregorianCalendar.getInstance(); System.out.println("Current date: " + cal.getTime()); cal.add((GregorianCalendar.MONTH), 2); System.out.println("Modified date: " + cal.getTime()); } }OutputCurrent date: Mon Nov 19 17:52:55 UTC 2018 Modified date: Sat Jan 19 ...
Read MoreJava Program to display previous year from GregorianCalendar
For GregorianCalendar class, import the following package.import java.util.GregorianCalendar;Create an object.GregorianCalendar cal = (GregorianCalendar) GregorianCalendar.getInstance();Now, use the following field and add() method with a negative one (-1) to display the previous year.cal.add((GregorianCalendar.YEAR), -1)Exampleimport java.util.Calendar; import java.util.GregorianCalendar; public class Demo { public static void main(String[] a) { GregorianCalendar cal = (GregorianCalendar) GregorianCalendar.getInstance(); System.out.println("Current date: " + cal.getTime()); // previous year cal.add((GregorianCalendar.YEAR), -1); System.out.println("Modified date: " + cal.getTime()); } }OutputCurrent date: Mon Nov 19 18:05:49 UTC 2018 Modified date: Sun Nov 19 18:05:49 UTC 2017
Read MoreJava program to check if binary representation is palindrome
A palindrome is a sequence that is same both forwards and backwards. The binary representation of a number is checked for being a palindrome but no leading 0’s are considered. An example of this is given as follows − Number = 5 Binary representation = 101 The binary representation of 5 is a palindrome as it is the same both forwards and backwards. A program that demonstrates this is given as follows. Example public class Example { public static void main(String argc[]) { long num = 5, n1; ...
Read MoreHow to display Java Runtime Environment (JRE) version
Use the System.getProperty() method in Java to get the Java Runtime Environment.It’s syntax is −String getProperty(String key)Above, the key is the name of the system property. Since, we want the Java Runtime Environment name, therefore we will add the key as −java.versionThe following is an example −Examplepublic class Demo { public static void main(String[] args) { System.out.print("Java Specification Version: "); System.out.println(System.getProperty("java.specification.version")); System.out.print("java Runtime Environment (JRE) version: "); System.out.println(System.getProperty("java.version")); } }OutputJava Specification Version: 1.8 java Runtime Environment (JRE) version: 1.8.0_141
Read MoreFormat numerical data with printf in Java
First, we have taken a double variable and displayed it twice.double d = 399.8877; System.out.printf("d1 = %2$f d2 = %1$g", d, d);After that, we have formatted numerical int data −int val1 = 90, val2 = 35, val3 = 88, val4 = 600; System.out.printf("val1 = %d, val2 = %x, val3 = %o, val4 = %d", val1, val2, val3, val4); System.out.printf("val2 = %4$d, val2 = %3$d, val3 = %2$o, val4 = %1$d", val1, val2, val3, val4);Above, we have displayed %o for octal, %x for hexadecimal, %d for integer, etc.The following is the complete example −Examplepublic class Demo { public static void ...
Read MoreRoll a six-sided die 6000 times in Java
In order to roll a six sided die 6000 times in Java, we need to the nextInt() statement with decision making statements.The nextInt() method returns the next random integer value from this random number generator sequence.Declaration − The java.util.Random.nextInt() method is declared as follows −public int nextInt()Let us see a program to roll a six sided die 6000 times −Exampleimport java.util.Random; public class Example { public static void main(String args[]) { Random rd = new Random(); // random number generator int freq[] = new int[6]; // creating an array to compute frequency of ...
Read MoreHow to convert JS date time to MySQL datetime?
We can convert JS date time to MySQL datetime with the help of toISOString() function.Let us see an example of JavaScript.Example Web Page Design document.writeln(new Date().toISOString().slice(0, 19).replace('T', ' ')); Current Date is displayed above... OutputThe following is the output.2018-11-23 11:14:38 Current Date is displayed above...
Read MoreGet all digits from a string in Java
Let’s say the following is our string.String str = "DEMO98 TE4567XT";To display only the digits from the above string, we have used the replaceAll() method and replace all the characters with empty.str.replaceAll("\D", ""))The following is the final example that displays only digits from the string.Examplepublic class Demo { public static void main(String[] args) { String str = "DEMO98 TE4567XT"; System.out.println("String = "+str); System.out.println("Displaying digits: "+str.replaceAll("\D", "")); } }OutputString = DEMO98 TE4567XT Displaying digits: 984567
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