java programs

 program -  import java.util.*; public class Calculator { public static void main(String[]args) { Scanner sc = new Scanner(System.in); System.out.println("Welcome to my calculator"); System.out.println("press 1 for multiplication\nPress 2 for addition\npress 3 for subtraction\npress 4 for division"); int a = sc.nextInt(); if (a==1) { System.out.println("Multipication Selected"); System.out.println("ener first Number"); int x = sc.nextInt(); System.out.println("ener second Number"); int y = sc.nextInt(); int res= multiplication(x,y); System.out.println("your answer is "+res); } if (a==2) { System.out.println("Addition Selected"); System.out.println("ener first Number"); int x = sc.nextInt(); System.out.println("ener second Number"); int y = sc.nextInt(); int res= addition(x,y); System.out.println("your answe...

 Program -  import java.util.*; public class urnumber{ public static void main(String[]args) { try{ Scanner sc = new Scanner(System.in); System.out.println("set your number"); int a =sc.nextInt(); try{ System.out.println("enter a your number"); int p = sc.nextInt(); if (p==a) { System.out.println("correct number"); } else { System.out.println("wrong number"); } }catch (Exception e) { System.out.println("sorry ! you have entered wrong number"); } }catch(Exception x) { System.out.println(" sorry ! enter a number"); } } } Output 1 -  Output 2 -  Output 3 - 

 Program -  import java.util.*; public class persondata { public static void main(String[]args) { person a = new person(); a.set(); System.out.println("your data is \n\n"); a.display(); } }  class person { private String name; private int age; private int salary;   public void display() { System.out.println("your name is :"+name); System.out.println("your age is :"+age); System.out.println("your salary is "+salary); } public void set(){ Scanner sc = new Scanner(System.in); System.out.println("enter your name"); name = sc.next(); System.out.println("enter your age"); age = sc.nextInt(); System.out.println("enter your salary"); salary = sc.nextInt(); } } outpiut -