/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
public class Main
{
    public static void main(String[] args)
    {
        int steps = 10000;
 
        long start = System.nanoTime();
        String result = "";
        for (int i=0;i<steps;i++)
        {
            result+="A";
        }
        long stop = System.nanoTime();
        long time = stop - start;
        System.out.printf("%-58s%15.8f\n","Czas wykonania (w sekundach):",(stop-start)*Math.pow(10,-9));
 
        start = System.nanoTime();
        StringBuilder result2 = new StringBuilder("");
        for (int i=0;i<steps;i++)
        {
            result2.append("A");
        }
        stop = System.nanoTime();
        time = stop-start;
        System.out.printf("%-58s%15.8f\n","Czas wykonania (w sekundach):",(stop-start)*Math.pow(10,-9));       
    }       
}

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