Question

Java language.

Create the following Java command line iterator application Lab4. Pass in three arguments when the program starts.

For example java Lab4 4 3 5

The command line arguments get passed into the main method as a String array in the variable object named args. Remember they get passed in as strings so you need to parse them into integers using the Integer.parseInt(args[X]) before you can treat them as integers. Create four sections that perform the following functions.

1. Create a for loop iteration structure: loop the number of times of args[0] passed in, printing the counter value each time to the command line
2. Create while loop iteration structure: loop the number of times of args[1] that was passed in, printing the counter value each time to the command line
3. Create a do loop iteration structure: loop the number of times of args[2] that was passed in, printing the counter value each time to the command line
4. Create a for each iteration structure to iterate through the args[] array printing the value in each element to the command line screen

Answer 1

Please find the code below:

Lab4.java

package classes6;

public class Lab4 {
   public static void main(String[] args) {

       int a = Integer.parseInt(args[0]);
       int b = Integer.parseInt(args[1]);
       int c = Integer.parseInt(args[2]);

       System.out.println("Printing counting of args[0] using for loop");
       for(int counter=1;counter<=a;counter++){
           System.out.println(counter);
       }

       int counter=1;
       System.out.println(" Printing counting of args[1] using while loop");
       while(counter<=b){
           System.out.println(counter);
           counter++;
       }

       counter=1;
       System.out.println(" Printing counting of args[2] using do-while loop");
       do{
           System.out.println(counter);
           counter++;
       }while(counter<=c);
      
       System.out.println(" Printing args using for each loop");
       for(String arg : args){
           System.out.println(arg);
       }

   }
}

output: