[NP] Baby Canvas

import java.io.*;
import java.util.Comparator;
import java.util.List;
import java.util.stream.Collectors;
import java.util.ArrayList;
import java.util.List;

class ShapesApplication {

    List<Canvas> canvases;

    public ShapesApplication() {
    }

    public int readCanvases(InputStream in) {
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(in));
        this.canvases= bufferedReader.lines().map(i->Canvas.create(i)).collect(Collectors.toList());

        return canvases.stream().mapToInt(i->i.numberOfElements()).sum();
    }

    public void printLargestCanvasTo(PrintStream out) {
        PrintWriter printWriter = new PrintWriter(out);

        printWriter.println(canvases.stream().max(Comparator.naturalOrder()).get());
        printWriter.flush();
    }
}

class Canvas implements Comparable<Canvas> {
    private String id;
    private List<Integer> lines;

    public Canvas(String id,List<Integer> lines) {
        this.id= id;
        this.lines= lines;
    }

    public int numberOfElements(){
        return lines.size();
    }

    public int getPerimeter(){
        return lines.stream().mapToInt(i->i).sum()*4;
    }

    public static Canvas create(String s){

        String[] parts = s.split("\\s+");
        String id= parts[0];
        List<Integer> lines = new ArrayList<>();
        for(int i=1;i<parts.length;i++){
            lines.add(Integer.parseInt(parts[i]));
        }
        return new Canvas(id,lines);
    }

    @Override
    public int compareTo(Canvas o) {
        return Integer.compare(this.getPerimeter(),o.getPerimeter());
    }

    @Override
    public String toString() {
        return String.format("%s %d %d",id,numberOfElements(),getPerimeter());
    }
}


public class Shapes1Test {

    public static void main(String[] args) {
        ShapesApplication shapesApplication = new ShapesApplication();

        System.out.println("===READING SQUARES FROM INPUT STREAM===");
        System.out.println(shapesApplication.readCanvases(System.in));
        System.out.println("===PRINTING LARGEST CANVAS TO OUTPUT STREAM===");
        shapesApplication.printLargestCanvasTo(System.out);

    }
}