error running java program

java.lang.NumberFormatException: For input string: "[29.42051539113255, -1.3622522059837383], "
	at java.lang.NumberFormatException.forInputString(Unknown Source)
	at java.lang.Integer.parseInt(Unknown Source)
	at java.lang.Integer.parseInt(Unknown Source)
	at J4.readfile(J4_2_MultiDimensionalArray7.java:52)
	at J4.main(J4.java:25)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at edu.rice.cs.drjava.model.compiler.JavacCompiler.runCommand(JavacCompiler.java:272)
>

import java.io.*;
import java.util.Arrays;

public class J4
{
    public static void main (String [] args) throws IOException
    {
        int numpoints = 100, dimension = 2, length = 100;//numpoints is set to 100, dimension is set to 2, length is set to 100
        
        //arrays are initializewd and declared
        double [] lengthscale = new double [dimension];
        double [][] locations = new double [numpoints][dimension];
        
        PrintWriter fileOut = new PrintWriter (new FileWriter ("arrayNumPoints.txt"));
        
        //calls writefile method
        writefile(lengthscale, locations, dimension, numpoints, length);
        
        for(int m=0; m <length; m++){//for loop
          fileOut.println(Arrays.toString(locations[m]) + ", ");//writes to file
        }
        fileOut.close ();//close file
        
        //calls readfile method
        readfile();
    }//end main
    
    public static void writefile(double lengthscale[], double locations[][], int dimension, int numpoints, int length)throws IOException
    {
    
        for (int a = 0; a < dimension; a++) {// for loop runs while a is less than dimension
            lengthscale[a] = length;// stores array
        }// end for loop
        
        for (int x=0; x < numpoints; x++){//for loop runs while x is less than numpoints
            for (int y=0; y < dimension; y++){//nested for loop runs while y is less than dimension
                locations [x][y]= (2 * Math.random() - 1) * lengthscale[y];//creates the range and chooses random point within 
                
            }//end nested for loop
        }//end for loop
    }//end writefile method
    
    public static void readfile()throws IOException
    {
        BufferedReader readFile = new BufferedReader (new FileReader ("arrayNumPoints.txt"));
        
        //initialize array
        int readarray [] = new int [100];
        //for loop runs while counter is less than 100
        for (int counter=0; counter < 100; counter++){
            //reads file
            readarray[counter] = Integer.parseInt (readFile.readLine ());
        }//end for loop
        
    }//end readfile method
}//end class