Question

Background info:
----------------------------------------------------------------
public class Point {

    protected int x;
    protected int y;

    public Point(){

        this.x = x;
        this.y = y;
    }

    public String toString(){

        return "" + x + " , " + y; 
    }
}
---------------------------------------------------------------
public class PointName extends Point {

    private String name;

    public PointName(String name, int x, int y){

        super();
        this.name = name;
    }

    public PointName() {
        // TODO Auto-generated constructor stub
    }


    public String toString(){

        return name + super.toString();

    }

}
------------------------------------------------------------------------

I want to create an application called closest point and in this class data is supplied from the standard input(keyboard). Then i want to supply 10 points (name given points) which will be stored in a vector. Then print them out. A bit more after this but im stuck in this stage as i dont know what to do. I welcome all possible solutions!!

MY SOLUTION SO FAR:

public class ClosestPoint {

    public static void main (String[] args){

        Scanner in = new Scanner(System.in);
        System.out.println("Write in the new point starting with name then x, y");

        String name = "";
        Integer x = 0;
        Integer y = 0;

        String nameGivenPoints[] = null; // List of points to create
        String line = in.nextLine(); // info from the board

        while(!line.endsWith("")){
        nameGivenPoints = line.split("\r\n\r");

        name = nameGivenPoints[0];
        x = Integer.parseInt(nameGivenPoints[1]);
        y = Integer.parseInt(nameGivenPoints[2]);

// Maybe a forloop here
        PointName tenDifferentPunkts = new PointName(name, x, y);
        System.out.println(tenDifferentPunkts.toString());
         line = in.nextLine();

                }   
        }

Answer 1

Try this:

PointName.java:

public class PointName extends java.awt.Point
{

    private String name;

    public PointName(String name, int x, int y)
    {
        super(x,y);
        this.name = name;
    }

    public String toString()
    {
        return this.name + " : " + super.toString(); 
    }
}

ClosestPoint.java:

import java.util.Scanner;
import java.util.List;
import java.util.ArrayList;

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

        Scanner in = new Scanner(System.in);
        String line;
        boolean done=false;
        String error=null;
        List<PointName> points=new ArrayList<PointName>();

        do
        {
            System.out.println("Enter a new point in this format: name:x,y");
            line=in.nextLine();
            done=line.equals("");
            if(!done) //Empty line terminates the loop
            {
                String [] parts=line.split(":");
                if(parts.length==2)
                {
                    String name=parts[0];
                    parts=parts[1].split(",");
                    if(parts.length==2)
                    {
                        try
                        {
                            PointName pn=new PointName(name,Integer.parseInt(parts[0]),Integer.parseInt(parts[1]));
                            points.add(pn);
                        }
                        catch(NumberFormatException ex)
                        {
                            error=ex.getMessage();
                        }
                    }else error="Invalid format";
                }else error="Invalid format";
            }
            if(!done) done=error!=null; //If there was an error exit the loop
        }while(!done); //Keep going until something sets the done flag
        if(error!=null)
        {
            System.out.println("Error: "+error);
        }
        else
        {
            //The points are all stored in the points List object now - this just iterates through and prints them out
            System.out.println("Here are the points you entered:");
            for(PointName pn : points)
            {
                System.out.println(pn.toString());
            }
        }
    } 
}