import java.util.*;
import java.lang.*;
import java.io.*;
 
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		double x1 = 0.0;
        double y1 = 0.0;
        double y2 = 0.0;
        double radius = 1.5;
        double increment = 0.1;
 
        //table heading
        System.out.println("    Points on a Circle of Radius " + radius);
        System.out.printf("%6s%8s%8s%8s%n", "x1", "y1", "x1", "y2");
        System.out.println(" -------------------------------------");
 
        //for loop processes coordinates and outputs to table
        for (x1 = radius; x1 >= (radius * -1); x1 -= increment){
            y1 = Math.sqrt(Math.pow(radius, 2) - Math.pow(x1, 2));
            y2 = 0 - Math.abs(y1);
            System.out.printf("%7.2f%8.2f%8.2f%8.2f%n", x1, y1, x1, y2);
        }
	}
}

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