Data Structure
MenuDriven Example
import java.util.*;
class menuDri{
public static void main(String [] aaaaaaaaaaa){
int op;
String str1="Tiger";
Scanner sc = new Scanner(System.in);
while(true){
System.out.println("\n1. Enter String ");
System.out.println("2. Display Entered String in Reverse ");
System.out.println("3. Display Length of Entered String ");
System.out.println("4. Exit ");
System.out.println("Enter Your Choice: ");
op = sc.nextInt();
switch(op){
case 1: System.out.println("Enter String: ");
str1 = sc.next();
break;
case 2: System.out.println("Reverse of "+str1);
for(int i=str1.length()-1;i>=0;i--)
System.out.print(str1.charAt(i));
break;
case 3:System.out.println("Length of "+str1+" is "+str1.length());
break;
default:
sc.close();
System.exit(0);
break;
}
}
}
}