Java Programming important questions

 import java.util.Scanner; public class SwitchJava { public static void main(String[] args)  { System.out.println("press 1 for balance enquiry"); System.out.println("press 2 for re fill"); System.out.println("press 3 for value added services"); System.out.println("press 4 for know more"); System.out.println("press 5 for navigating to previous menu"); System.out.println("press 6 for talk to out customer care"); Scanner sc=new Scanner(System.in); int val = sc.nextInt(); switch(val) { case 1: System.out.println("available balance in 973.34 rupee"); break; case 2: System.out.println("you have recharger with 100 rupees coupan"); break; case 3: System.out.println("your request for change caller tune proceed"); break; case 4: System.out.println("new service information should provided"); break; case 5: Syste...

 import java.util.Scanner; public class Pelindrome2 { public static void main(String[] args) { Scanner sc=new Scanner(System.in); String actualString = sc.next(); char[] chararr = actualString.toCharArray(); String rev=""; for(int i=chararr.length-1;i>=0;i--) { rev=rev+chararr[i]; } //for printing reverse of string System.out.println(rev); if(actualString.equals(rev)) { System.out.println("given string "+actualString+" is pelindrome"); } else { System.out.println("given string "+actualString+" is not pelindrome"); } } }

 package javaprogram; import java.util.Scanner; public class Pelindrome1 { public static void main(String[] args) { Scanner sc=new Scanner(System.in); int actualNum=sc.nextInt(); //1331 int cloneNum = actualNum; int revNum=0; while(cloneNum>0) { int r=cloneNum%10; revNum=revNum*10+r; cloneNum=cloneNum/10; } System.out.println(revNum); if(revNum==actualNum) { System.out.println("given num"+actualNum+" is pelindrome"); } else { System.out.println("given num"+actualNum+" is not pelindrome"); } } }