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Articles on Trending Technologies
Technical articles with clear explanations and examples
Do you think operator < is faster than <= in C/C++?
No, the operator < takes same time to execute as operator
Read MoreCheck that the String does not contain certain characters in Java
Let’s say the following is our string with special characters.String str = "test*$demo";Check for the special characters.Pattern pattern = Pattern.compile("[^A-Za-z0-9]"); Matcher match = pattern.matcher(str); boolean val = match.find();Now, if the bool value “val” is true, that would mean the special characters are in the string.if (val == true) System.out.println("Special characters are in the string.");Exampleimport java.util.regex.Matcher; import java.util.regex.Pattern; public class Demo { public static void main(String []args) { String str = "test*$demo"; System.out.println("String: "+str); Pattern pattern = Pattern.compile("[^A-Za-z0-9]"); Matcher match = pattern.matcher(str); boolean val = ...
Read MoreNegate a BigInteger in Java
Use the BigInteger negate() method in Java to negate a BigInteger.First, let us create an object −BigInteger one, two; one = new BigInteger("200");Negate the above and assign it to the second object −two = one.negate();The following is an example −Exampleimport java.math.*; public class BigIntegerDemo { public static void main(String[] args) { BigInteger one, two; one = new BigInteger("200"); System.out.println("Actual Value: " +one); // negate two = one.negate(); System.out.println("Negated Value: " +two); } }OutputActual Value: 200 Negated Value: -200
Read MoreJava Program to format to 2 decimal places in a 10-character field
To format, use the Formatter class. Import the following package to work with the Formatter class in Java −import java.util.Formatter;Create a Formatter object and format to 2 decimal places in a 10-character field −Formatter f = new Formatter(); System.out.println(f.format("%10.2e", 3989.7886));The following is the complete example −Exampleimport java.util.Formatter; public class Demo { public static void main(String args[]) { Formatter f = new Formatter(); System.out.println(f.format("%08d", 697)); f = new Formatter(); System.out.println(f.format("%03d", 9878)); f = new Formatter(); System.out.println(f.format("%10.2e", 3989.7886)); } }Output00000697 9878 3.99e+03
Read MoreString Operations in Pytho
In python, there is a standard library, called string. In the string module, there are different string related constants, methods, classes are available. To use these modules, we need to import the string module in our code. import string Some string constants and their corresponding values are as follows − Sr.No. String Constant & Values into it 1 string.ascii_lowercase'abcdefghijklmnopqrstuvwxyz' 2 string.ascii_uppercase'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 3 string.ascii_lettersConcatenation of asci_lowwecase and ascii_uppercase 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ' 4 string.digits'0123456789' 5 string.hexdigits'0123456789abcdefABCDEF' 6 string.octdigits'01234567' 7 string.punctuation'!"#$%&'()*+, -./:;?@[\]^_`{|}~' ...
Read MorePerforming Bitwise Operations with BigInteger in Java
BigInteger class is used for big integer calculations which are outside the limit of the primitive data types. It provides operations for modular arithmetic, GCD calculation, primality testing, prime generation, bit manipulation, and a few other miscellaneous operations.Let us work with the testBit() method in Java to perform Bitwise operation. The java.math.BigInteger.testBit(int n) returns true if and only if the designated bit is set −The following is an example −Exampleimport java.math.*; public class BigIntegerDemo { public static void main(String[] args) { BigInteger one; Boolean two; one = new BigInteger("5"); ...
Read MoreDisplaying at most 10 characters in a string in Java
To display at most 10 characters in a string, work with the Formatter class.Import the following package for Formatter class in Java −import java.util.Formatter;Create a new Formatter object −Formatter f = new Formatter();Let us now display at most 10 characters in a string −f = new Formatter(); System.out.println("Displaying at most 10 characters: "+f.format("%.10s", "This is demo text!"));The following is an example −Exampleimport java.util.Formatter; public class Demo { public static void main(String args[]) { Formatter f = new Formatter(); String str = "This is demo text!"; ...
Read MorePython Text Wrapping and Filling
In python the textwrap module is used to format and wrap plain texts. There are some options to format the texts by adjusting the line breaks in the input paragraph. To use these modules, we need to import the textwrap module in our code. import textwrap The Textwrapper instance attributes of the constructors are as follows − Sr.No. Attribute & Description 1 width The maximum length of lines. Default value is 70 2 expand_tabs If the value of this attribute is true, then all tabs will be replaced by spaces. Default value ...
Read MoreShift right in a BigInteger in Java
To shift right in a BigInteger, use the shiftRight() method.The java.math.BigInteger.shiftRight(int n) returns a BigInteger whose value is (this >> n). Sign extension is performed. The shift distance, n, may be negative, in which case this method performs a left shift. It computes floor(this / 2n).The following is an example −Exampleimport java.math.*; public class Demo { public static void main(String[] args) { BigInteger one; one = new BigInteger("25"); one = one.shiftRight(3); System.out.println("Result: " +one); } }OutputResult: 3
Read MoreGet the system properties from RuntimeMXBean in Java
RuntimeMXBean in the management interface for the runtime system of the Java virtual machine.RuntimeMXBean runtimeMX = ManagementFactory.getRuntimeMXBean();To get the system properties, use the getSystemProperties() method −System.out.println("System properties from RuntimeMXBean: "+runtimeMX.getSystemProperties());The following is an example −Exampleimport java.lang.management.ManagementFactory; import java.lang.management.RuntimeMXBean; import java.util.Date; public class Demo { public static void main(String args[]) throws Exception { RuntimeMXBean runtimeMX = ManagementFactory.getRuntimeMXBean(); System.out.println("System properties from RuntimeMXBean: "+runtimeMX.getSystemProperties()); } }OutputSystem properties from RuntimeMXBean: {awt.toolkit=sun.awt.X11.XToolkit, file.encoding.pkg=sun.io, java.specification.version=1.8, sun.cpu.isalist=, sun.jnu.encoding=UTF-8, java.class.path=/home/cg/root/GNUstep/Library/Libraries/Java:/usr/GNUstep/Local/Library/Libraries/Java:/usr/G NUstep/System/Library/Libraries/Java::/usr/share/java/mysql-connector- java.jar:.:/var/www/html/lib:/var/www/html/lib/dom4j-1.6.jar:/var/www/html/lib/guava- 18.0.jar:/var/www/html/lib/jackson-all.jar:/var/www/html/lib/jaxen- 1.1.4.jar:/var/www/html/lib/jcommon.jar:/var/www/html/lib/jdom2- 2.0.5.jar:/var/www/html/lib/jfreechart.jar:/var/www/html/lib/junit-4.12.jar:/var/www/html/lib/spymemcached- 2.10.3.jar:/var/www/html/lib/stax-1.2.0.jar:/var/www/html/lib/xstream-1.4.7.jar:/var/www/html/lib/gson- 2.3.1.jar:/var/www/html/lib/hamcrest-core-1.3.jar, java.vm.vendor=Oracle Corporation, sun.arch.data.model=64, ...
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