Question

What is the perimeter of the shape made from the file datatest4.txt whose contents are shown below (just give to two decimal (places)? JAVA!

-3, 9

-8, 7

-12, 4

-6, -2

-4, -6

2, -8

6, -5

10, -3

8, 5

4, 8

Answer 1

OUTPUT ::

RAW CODE ::

_____________________________________________ main.java ________________________________________

import java.util.*;
import java.io.*;

class Main{
   public static double distance(int[] A, int[] B){
       int x,y;
       x = A[0] - B[0] ; y = A[1] - B[1]; // X wise distance , Y wise distance
       return Math.sqrt((x*x)+(y*y)); // Pythagerous theorem
   }
   public static void main(String[] args){
       String line; String[] val; // Declarng variables
       int[] start = new int[2];
       int[] temp = new int[2];
       int[] cur = new int[2];
       start[0] = -1 ; start[1] = -1;
       int perimeter = 0; // perimeter stars with 0
       try{
           File fl = new File("datatest4.txt");
           Scanner sc = new Scanner(fl);
           while (sc.hasNextLine()){
               line = sc.nextLine(); val = line.split(", "); // Read line by line, split the values
               cur[0] = Integer.parseInt(val[0]); // Converting Them to integers
               cur[1] = Integer.parseInt(val[1]);
               if(start[0] == -1 && start[1] == -1){ // if it start line
                   start[0] = cur[0]; start[1] = cur[1]; // Record it in start
                   temp[0] = cur[0]; temp[1] = cur[1]; // Storing past values in temp
                   continue; // For first one continue
               }
               perimeter += distance(temp, cur); // Calculate distance for current to past value
               temp[0] = cur[0]; temp[1] = cur[1]; // Storing past values in temp
           }
           perimeter += distance(cur, start); // Finally Calculate distance for end to start
           System.out.println("Perimeter is : "+perimeter); // Printing
       } catch(Exception e){
           System.out.println("Error");
       }
   }
}

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