How to solve Could not find or load main class
$ java helloworldError: Could not find or load main class helloworld Reason 1 – Made a mistake with the classname argument a simple class name: java ListUser
Category: Java
Linux to AWS EC2 connection with jsch with private key
Java program for Linux server to EC2 instance with ppk file,
Program to check armstrong number in 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 … Read More
Program to print Floyd’s triangle in 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 … 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 … 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”); … Read More
Program for linear search in Java
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 = … Read More
Program for binary search in 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 = … 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 … 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); … Read More