java program to add two numbers is a very simple program. It is required by learners How can we add two numbers. We will start with simple addition and try to cover additional things here. Simple java program to add two numbers Steps to add two numbers Store two numbers in two variables Add both … Read more
Here we will develop the Java swing login form with database connectivity. We considered a small example with student details to log in From Java Swing and redirect to another frame after login. Java swing login form with database connection in Netbeans Here we have created a swing login form in java and connected that … Read more
Here we will see how can we import math class in Java. As we already know to import any class from any package we use the following notation import packagename.classname; example import java.util.Scanner; Here java is package util is subpackage and Scanner is a class. By importing the Scanner class we can use all its … Read more
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | public class StringSearch { public static void main(String[] args) { String sentence = "Made in india"; String subStr1 = "in"; String subStr2 = "out"; String subStr3 = "india"; int i = sentence.indexOf(subStr1); if (i != -1) { System.out.println(subStr1 + " is present in given sentence "); } else { System.out.println(subStr1 + " is not present in given sentence "); } if (sentence.indexOf(subStr2) != -1) { System.out.println(subStr2 + " is present in given sentence "); } else { System.out.println(subStr2 + " is not present in given sentence "); } if (sentence.contains(subStr3)) { System.out.println(subStr3 + " is present in given sentence "); } else { System.out.println(subStr3 + " is not present in given sentence "); } } } |
indexOf(String str) return int value that is the index value of str if found in string other wise it returns -1.The index value start from 0. contains(CharSequence str) returns boolean value if str is present in given string it will return true else false.
Gson is Java JSON library that is used to convert Java object to/from JSON GSON is developed by google. GSON Maven dependency is as below
1 2 3 4 5 6 | <!-- https://mvnrepository.com/artifact/com.google.code.gson/gson --> <dependency> <groupid>com.google.code.gson</groupid> <artifactid>gson</artifactid> <version>2.8.5</version> </dependency> |
You can also download Gson Jar from here Gson jar contains API to work with JSON GOal of GSON is provide simple methods to convert and receive JSON, Provides … Read more
In a programming language we have to repeat set of instruction many time as per programmer’s requirements. To repeat instructions java provides looping statements. Looping is also known as Iterative statementFollowing are types of loop in java.1. For loop statement2. While loop statement3. Do while loop statement4. For each loop (enhanced for loop) Work of … Read more
A Leap Year is a year that has 366 days. This year February is of 29 days. Leap years occur in every four years. A leap year has the following constraints. We can check Leap Year Program in Java as below A year is divisible by 400 then it is a leap year A year … Read more
One of the important topic Exception handling in java Here we will discuss basics of exceptions, Why Exception handling and its types. What is Exception in Java A unwanted event that disrupts the program execution. In Java all Exceptions are class. Why Exception Occurs Due to wrong user input Incorrect programming logic Example of Exceptions … Read more
Prime number program in java using for loop is very simple. we already discussed the prime number example with the while loop. Prime number program in java using for loop
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | import java.util.Scanner; public class PrimeNumberChecker { public static void main(String[] args) { System.out.println("Enter a number to check Prime or Not"); Scanner scanner = new Scanner(System.in); int number = scanner.nextInt(); int count = 0; for(int i=2;i<=number/2;i++){ if (number % i == 0) { count++; break; } i++; } if(count == 0) { System.out.println(number + " is prime number"); } else { System.out.println(number + " is not a prime number"); } } } |
Prime Number Between Given Range In Java using for loop
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 | import java.util.Scanner; public class PrimeNumberChecker2 { public static void main(String[] args) { System.out.println("Enter a number range to generate prime numbers in between"); Scanner scanner = new Scanner(System.in); int number1 = scanner.nextInt(); int number2 = scanner.nextInt(); if (number1 >= number2) { System.out.println("Number2 must be greater then number1"); System.exit(0); } for(int j=number1;j<=number2;j++){ int count = 0; for(int i=2;i<=j/2;i++){ if (j % i == 0) { count++; break; } } if (count == 0) { System.out.println(number1 + " is prime number"); } number1++; } } } |
In Java, the term “contains list java” is used to check whether a particular object or element is present in a list or collection. The ArrayList method contains() is used to check specified elements in List. Contains Syntax public boolean contains(Object o) Parameters: The method takes a single parameter, which is the object or element that you want … Read more
