Shortest Distance Exaustive

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package pontosrandom;
import java.io.IOException;
import java.util.*;

/**
 *
 * @author j_mig_000
 */
public class PontosRandom {

    /**
     * @param args the command line arguments
     */
    static String readLn(int maxLg) { //utility function to read from stdin

        byte lin[] = new byte[maxLg];
        int lg = 0, car = -1;
        String line = "";
        try {
            while (lg < maxLg) {
                car = System.in.read();
                if ((car < 0) || (car == '\n')) {
                    break;
                }
                lin[lg++] += car;
            }
        } catch (IOException e) {
            return (null);
        }
        if ((car < 0) && (lg == 0)) {
            return (null); // eof
        }
        return (new String(lin, 0, lg));
    }

    static void distancia(int[] array){

        int x1,y1,x2,y2;
        float temp,distancia = Integer.MAX_VALUE;

        for(int i = 0;i<array.length - 1; i += 2 ){
            x1 = array[i];
            y1 = array[i+1];
            for (int j = 0; j < array.length - 1; j += 2) {
                x2 = array[j];
                y2 = array[j+1];

                temp = (float) Math.sqrt((Math.pow(x2-x1,2) + Math.pow(y2 - y1,2)));
                if( j!= i && temp <= distancia){
                    distancia = temp;
                }
            }
        }
        System.out.printf("%.3f \n", distancia);
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        int contador = 0;
        String linha;
        String tamanho = readLn(200);
        String[] numeros;
        int[] array = new int[Integer.parseInt(tamanho) * 2];


        while (contador < (Integer.parseInt(tamanho))*2) {
            linha = readLn(500);
            numeros = linha.split(" ");
            for(int i=0;i<numeros.length;i++){
                array[contador] = Integer.parseInt(numeros[i]);
                contador ++;
            }
        }

        distancia(array);
    }
}