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Java

Program to check armstrong number in Java

java

import java.util.*; class ArmstrongNumber { public static void main(String args[]) { int n, sum = 0, temp, r; Scanner in = new Scanner(System.in); System.out.println("Enter a number to check if it is an armstrong number"); n = in.nextInt(); temp = n; while( temp != 0 ) { r = temp%10; sum = sum + r*r*r; temp = temp/10; } if ( ... Read More »

Program to print Floyd’s triangle in Java

java

import java.util.Scanner; class FloydTriangle { public static void main(String args[]) { int n, num = 1, c, d; Scanner in = new Scanner(System.in); System.out.println("Enter the number of rows of floyd's triangle you want"); n = in.nextInt(); System.out.println("Floyd's triangle :-"); for ( c = 1 ; c <= n ; c++ ) { for ( d = 1 ; d <= ... Read More »

Program to reverse a string in Java

import java.util.*; class ReverseString { public static void main(String args[]) { String original, reverse = ""; Scanner in = new Scanner(System.in); System.out.println("Enter a string to reverse"); original = in.nextLine(); int length = original.length(); for ( int i = length - 1 ; i >= 0 ; i-- ) reverse = reverse + original.charAt(i); System.out.println("Reverse of entered string is: "+reverse); } ... Read More »

Program to compare two strings in Java

import java.util.Scanner; class CompareStrings { public static void main(String args[]) { String s1, s2; Scanner in = new Scanner(System.in); System.out.println("Enter the first string"); s1 = in.nextLine(); System.out.println("Enter the second string"); s2 = in.nextLine(); if ( s1.compareTo(s2) > 0 ) System.out.println("First string is greater than second."); else if ( s1.compareTo(s2) < 0 ) System.out.println("First string is smaller than second."); else System.out.println("Both ... Read More »

Program for linear search in Java

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import java.util.Scanner; class LinearSearch { public static void main(String args[]) { int c, n, search, array[]; Scanner in = new Scanner(System.in); System.out.println("Enter number of elements"); n = in.nextInt(); array = new int[n]; System.out.println("Enter " + n + " integers"); for (c = 0; c < n; c++) array[c] = in.nextInt(); System.out.println("Enter value to find"); search = in.nextInt(); for (c = ... Read More »

Program for binary search in Java

java

import java.util.Scanner; class BinarySearch { public static void main(String args[]) { int c, first, last, middle, n, search, array[]; Scanner in = new Scanner(System.in); System.out.println("Enter number of elements"); n = in.nextInt(); array = new int[n]; System.out.println("Enter " + n + " integers"); for (c = 0; c < n; c++) array[c] = in.nextInt(); System.out.println("Enter value to find"); search = in.nextInt(); ... Read More »

Program to find all substrings of a string in Java

import java.util.Scanner; class SubstringsOfAString { public static void main(String args[]) { String string, sub; int i, c, length; Scanner in = new Scanner(System.in); System.out.println("Enter a string to print it's all substrings"); string = in.nextLine(); length = string.length(); System.out.println("Substrings of ""+string+"" are :-"); for( c = 0 ; c < length ; c++ ) { for( i = 1 ; i ... Read More »

Program to display date and time, print date and time using java program

import java.util.*; class GetCurrentDateAndTime { public static void main(String args[]) { int day, month, year; int second, minute, hour; GregorianCalendar date = new GregorianCalendar(); day = date.get(Calendar.DAY_OF_MONTH); month = date.get(Calendar.MONTH); year = date.get(Calendar.YEAR); second = date.get(Calendar.SECOND); minute = date.get(Calendar.MINUTE); hour = date.get(Calendar.HOUR); System.out.println("Current date is "+day+"/"+(month+1)+"/"+year); System.out.println("Current time is "+hour+" : "+minute+" : "+second); } } Output Read More »

Program to reverse number in Java

java

import java.util.Scanner; class ReverseNumber { public static void main(String args[]) { int n, reverse = 0; System.out.println("Enter the number to reverse"); Scanner in = new Scanner(System.in); n = in.nextInt(); while( n != 0 ) { reverse = reverse * 10; reverse = reverse + n%10; n = n/10; } System.out.println("Reverse of entered number is "+reverse); } } Output Read More »

Program to add two matrices in Java

import java.util.Scanner; class AddTwoMatrix { public static void main(String args[]) { int m, n, c, d; Scanner in = new Scanner(System.in); System.out.println("Enter the number of rows and columns of matrix"); m = in.nextInt(); n = in.nextInt(); int first[][] = new int[m][n]; int second[][] = new int[m][n]; int sum[][] = new int[m][n]; System.out.println("Enter the elements of first matrix"); for ( c ... Read More »