karthikeya Boyini

karthikeya Boyini

1,421 Articles Published

Articles by karthikeya Boyini

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Store unicode in a char variable in Java

karthikeya Boyini
karthikeya Boyini
Updated on 11-Mar-2026 1K+ Views

To store Unicode in a char variable, simply create a char variable.char c;Now assign unicode.char c = '\u00AB';The following is the complete example that shows what will get displayed: when Unicode is stored in a char variable and displayed.Examplepublic class Demo {    public static void main(String []args) {       int a = 79;       System.out.println(a);       char b = (char) a;       System.out.println(b);       char c = '\u00AB';       System.out.println(c);    } }Output79 O «

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Java program to extract 'k' bits from a given position

karthikeya Boyini
karthikeya Boyini
Updated on 11-Mar-2026 582 Views

Extraction of k bits from the given position in a number involves converting the number into its binary representation. An example of this is given as follows −Number = 20 Binary representation = 10100 k = 3 Position = 2 The bits extracted are 010 which represent 2.A program that demonstrates this is given as follows.Examplepublic class Example {    public static void main (String[] args) {       int number = 20, k = 3, pos = 2;       int exNum = ((1 > (pos - 1));       System.out.println("Extract " + k + " ...

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Display the Operating System name in Java

karthikeya Boyini
karthikeya Boyini
Updated on 11-Mar-2026 4K+ Views

Use the System.getProperty() method in Java to get the Operating System name.It’s syntax is −String getProperty(String key)Above, the key is the name of the system property. Since, we want the OS name, therefore we will add the key as −os.nameExamplepublic class Demo {     public static void main(String[] args) {        System.out.print("Operating System: ");        System.out.println(System.getProperty("os.name"));     } }OutputOperating System: Linux

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Convert string to char array in Java

karthikeya Boyini
karthikeya Boyini
Updated on 11-Mar-2026 4K+ Views

The following is our string.String str = "Tutorial";Now, use the toCharArray() method to convert string to char array.char[] ch = str.toCharArray();Now let us see the complete example.Examplepublic class Demo {    public static void main(String []args) {       String str = "Tutorial";       System.out.println("String: "+str);       char[] ch = str.toCharArray();       System.out.println("Character Array...");       for (int i = 0; i < ch.length; i++) {          System.out.print(ch[i]+" ");       }    } }OutputString: Tutorial Character Array... T u t o r i a l

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C# Queryable Take() Method

karthikeya Boyini
karthikeya Boyini
Updated on 11-Mar-2026 3K+ Views

Get specified number of elements from the beginning using the Take() method.The following is our array.int[] marks = { 35, 72, 50, 90, 95, 85, 52, 67 };Now, use OrderByDescending to order the elements in Descending order. Then use the Take() method to get the elements.marks.AsQueryable().OrderByDescending(s => s).Take(5);Let us see the complete example.Exampleusing System; using System.Linq; using System.Collections.Generic; public class Demo {    public static void Main() {       int[] marks = { 35, 72, 50, 90, 95, 85, 52, 67 };       // top 5 student marks       IEnumerable selMarks = marks.AsQueryable().OrderByDescending(s => s).Take(5);       foreach (int res in selMarks) {          Console.WriteLine(res);       }    } }Output95 90 85 72 67

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Determine if a String is a legal Java Identifier

karthikeya Boyini
karthikeya Boyini
Updated on 11-Mar-2026 956 Views

To determine if a String is a legal Java Identifier, use the Character.isJavaIdentifierPart() and Character.isJavaIdentifierStart() methods.Character.isJavaIdentifierPart()The java.lang.Character.isJavaIdentifierPart() determines if the character (Unicode code point) may be part of a Java identifier as other than the first character.A character may be part of a Java identifier if any of the following are true.it is a letterit is a currency symbol (such as '$')it is a connecting punctuation character (such as '_')it is a digitit is a numeric letter (such as a Roman numeral character)Character.isJavaIdentifierStart()The java.lang.Character.isJavaIdentifierStart() determines if the character (Unicode code point) is permissible as the first character in a Java ...

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Formatting a Negative Number Output with Parentheses in Java

karthikeya Boyini
karthikeya Boyini
Updated on 11-Mar-2026 799 Views

A negative number output can be shown using the Formatter object −Formatter f = new Formatter(); f.format("%12.2f", -7.598); System.out.println(f);Try the below given code to format a Negative Number Output with Parentheses −Formatter f = new Formatter(); f.format("%(d", -50); System.out.println(f);The following is an example −Exampleimport java.util.Formatter; public class Demo { public static void main(String args[]) { Formatter f = new Formatter(); f.format("% d", 50); System.out.println(f); // negative number inside parentheses f = new Formatter(); f.format("%(d", -50); System.out.println(f); } }Output50 (50)

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Tokenizing a String in Java

karthikeya Boyini
karthikeya Boyini
Updated on 11-Mar-2026 387 Views

We have the following string −String str = "This is demo text, and demo line!";To tokenize the string, let us split them after every period (.) and comma (,)String str = "This is demo text, and demo line!";The following is the complete example.Examplepublic class Demo {     public static void main(String[] args) {        String str = "This is demo text, and demo line!";        String[] res = str.split("[, .]", 0);        for(String myStr: res) {           System.out.println(myStr);        }     } }OutputThis is demo text and demo line!

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C# Program to order array elements

karthikeya Boyini
karthikeya Boyini
Updated on 11-Mar-2026 170 Views

Use ThenBy() method to order array elements. Let’s say we have the following string array.string[] str = { "Sandler", "Jack", "Tom", "Matt", "Henry", "Johnny" };Now, use Lambda Expressions and set a condition inside the ThenBy() method to sort the strings according to the number of characters they have.IEnumerable res = str.AsQueryable().OrderBy(alp => alp.Length).ThenBy(alp => alp);Here is the entire example to order array elements using ThenBy() method.Exampleusing System; using System.Linq; using System.Collections.Generic; public class Demo {    public static void Main() {       string[] str = { "Sandler", "Jack", "Tom", "Matt", "Henry", "Johnny" };       IEnumerable res ...

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The # format flag in Java

karthikeya Boyini
karthikeya Boyini
Updated on 11-Mar-2026 396 Views

Apply the # flag to the %o, %x, %e, and %f format specifiers. If you want to display the hexadecimal number with a 0x prefix, then precede the %x specifier with #.Preceding the %x specifier with a #, the hexadecimal number will be printed with a 0x prefix.Let us see an example wherein $e is used. It includes a decimal point, even if the decimal digits are not present −Exampleimport java.util.Formatter; public class Demo { public static void main(String args[]) { Formatter f = new Formatter(); System.out.println(f.format("%#e", 5F)); } }Output5.000000e+00

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