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Programming Articles
Page 1561 of 2547
C++ Program to Find ASCII Value of a Character
There are 128 characters in the ASCII (American Standard Code for Information Interchange) table with values ranging from 0 to 127.Some of the ASCII values of different characters are as follows −CharacterASCII ValueA65a97Z90z122$36&38?63A program that finds the ASCII value of a character is given as follows −Example#include using namespace std; void printASCII(char c) { int i = c; cout
Read MoreFind frequency of each word in a string in Java
In order to get frequency of each in a string in Java we will take help of hash map collection of Java.First convert string to a character array so that it become easy to access each character of string.Now compare for each character that whether it is present in hash map or not in case it is not present than simply add it to hash map as key and assign one as its value.And if character is present than find its value which is count of occurrence of this character in the string (initial we put as 1 when it ...
Read MoreReplace '*' with '^' with Java Regular Expressions
To replace *' with '^' using Java Regular Expressions, we need to use the replaceAll() method. The replaceAll() method returns a String replacing all the character sequence matching the regular expression and String after replacement.Declaration − The java.lang.String.replaceAll() method is declared as follows −public String replaceAll(String regex, String replaced) Let us see a program to replace '*' with '^' using Java Regular Expressions −Examplepublic class Example { public static void main( String args[] ) { String str = new String("H*e*l*l*o"); System.out.println( "Initial String : "+ str); // replacing '*' with ...
Read MoreC++ Program to Multiply two Numbers
Multiplication of two numbers a and b yields their product. Value of a is added as many times as the value of b to get the product of a and b.For example.5 * 4 = 20 7 * 8 = 56 9 * 9 = 81Program to Multiply two Numbers using * OperatorA program to multiply two numbers using the * operator is given as follows −Example#include using namespace std; int main() { int a = 6, b = 8; cout
Read MoreReplace one string with another string with Java Regular Expressions
To replace one string with another string using Java Regular Expressions, we need to use the replaceAll() method. The replaceAll() method returns a String replacing all the character sequence matching the regular expression and String after replacement.Declaration − The java.lang.String.replaceAll() method is declared as follows −public String replaceAll(String regex, String replaced) Let us see a program to replace one string with another string using Java Regular Expressions −Examplepublic class Example { public static void main( String args[] ) { String str = new String("Good Harry Good"); System.out.println( "Initial String : "+ str); ...
Read MoreC++ Program to Check Whether a Number is Palindrome or Not
A palindrome number remains the same if its digits are reversed i.e its value does not change. A palindrome number can also be called symmetric. For example: The numbers 12321, 1551, 11 etc are palindromes as they do not change even if their digits are reversed.A program that checks if a number is palindrome or not is as follows.Example#include using namespace std; void palindrome(int num) { int rev=0,val; val = num; while(num > 0) { rev = rev * 10 + num % 10; num = num / 10; } if(val==rev) cout
Read MoreCheck two numbers for equality in Java
To check two numbers for equality in Java, we can use the Equals() method as well as the == operator.Firstly, let us set Integers.Integer val1 = new Integer(5); Integer val2 = new Integer(5);Now, to check whether they are equal or not, let us use the == operator.(val1 == val2)Let us now see the complete example.Examplepublic class Demo { public static void main( String args[] ) { Integer val1 = new Integer(5); Integer val2 = new Integer(5); Integer val3 = new Integer(10); System.out.println("Integer 1 = "+val1); ...
Read MoreGet the list of all the public fields in Java
An array of field objects is returned by the method java.lang.Class.getFields(). These field objects include the accessible public fields of the class that is represented by the class object.Also, the getFields() method returns a zero length array if the class or interface has no public fields that are accessible or if a primitive type, array class or void is represented in the Class object.A program that demonstrates this is given as follows −Exampleimport java.lang.reflect.*; public class Demo { public static void main(String[] argv) throws Exception { Class c = java.lang.Thread.class; Field[] fields = ...
Read MoreC++ Program to Implement Sparse Matrix
A sparse matrix is a matrix in which majority of the elements are 0. An example for this is given as follows.The matrix given below contains 5 zeroes. Since the number of zeroes is more than half the elements of the matrix, it is a sparse matrix.5 0 0 3 0 1 0 0 9A program to implement a sparse matrix is as follows.Example#include using namespace std; int main () { int a[10][10] = { {0, 0, 9} , {5, 0, 8} , {7, 0, 0} }; int i, j, count = 0; int row = 3, col = 3; for (i = 0; i < row; ++i) { for (j = 0; j < col; ++j){ if (a[i][j] == 0) count++; } } cout
Read MoreRemoving a Preference from a Preference Node in Java
In order to remove a preference from a preference node in Java, we use the remove() method. The remove method() removes all the values associated with the specified key in the preference node.Declaration − The java.util.prefs.Preferences.remove() method is declared as follows −public abstract void remove (String key)where key is the key whose preference is to be removedThe remove methods throws the following exceptions −NullPointerExceptionThis exception occurs when the key is nullIllegalStateExceptionThis exception is thrown when the ancestor node is removed by the removeNode() method.Let us see a program to remove the preference from a preference node −Exampleimport java.util.prefs.Preferences; public class ...
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