JAVA

I need to write a code that calculates mean and standarddeviation using arrays and OOP. This is what I have so far. I'mclose but my deviation calculator method is throwing errors.

Thanks so much :)

import java.util.Scanner;import java.util.Arrays;public class STDMeanArray {  private double[] tenUserNums = new double[10];//Initialize an array with ten index'  private double mean;  private double deviation;  Scanner input = new Scanner(System.in);//create new scanner object  /*//constructor  public STDMeanArray(double tenUserNum [], double mean, double deviation){    super();    this.tenUserNums = tenUserNum;    this.mean = mean;    this.deviation = deviation;  }//end constructor*/  //getters and setters  public double[] getTenUserNums() {    return this.tenUserNums;  }  public void setTenUserNums(double[] tenUserNums) {    this.tenUserNums = tenUserNums;  }  public double getMean() {    return this.mean;  }  public void setMean(double mean) {    this.mean = mean;  }  public double getDeviation() {    return this.deviation;  }  public void setDeviation(double deviation) {    this.deviation = deviation;  }  public void promptUser() {    System.out.print(\"Enter ten numbers \");//prompt user    //fill array here    for (int i = 0; i < tenUserNums.length; i++) {      tenUserNums[i] = input.nextDouble();//fill the array      //System.out.print(anotherList[i] + \" \");    }//end for loop    System.out.println(\"The Numbers you entered into the array are\");//test erase me!!!!!    System.out.printf(Arrays.toString(this.tenUserNums)); // displays user filled array//test remove me!!!!!!!!  }//ends user input method  public void calculateMean() {    for (Double num : getTenUserNums()) {//short version of for loop      setMean(getMean() + num);    }    setMean(getMean() / getTenUserNums().length);//set mean again    System.out.println(\"\n the mean is: \" + String.format(\"%.02f\",getMean()));//this is a test erase me!!!!!!  }//ends calculate mean method  public void calculateDeviation(){    double sumMeanSquared=0.0;    String placeHoldNum=\"0\";    for(int i=0; i < getTenUserNums().length; i++)    {      if (this.tenUserNums == null// If the array is empty          || i >= this.tenUserNums.length || i < 0) {// or the index is not in array range        System.out.println(\"\n\n No deletion operation can be performed\n\n\");//return No deletion operation can be performed      } //ends if statement      else      {        placeHoldNum += Character.toString(getTenUserNums().length).charAt(i);        sumMeanSquared += Math.pow( Double.valueOf(placeHoldNum) - getMean(),2);        placeHoldNum=\"\";      }    }    setDeviation(Math.sqrt(sumMeanSquared/10.0));    System.out.println(\"The deviation is; \" + getDeviation());  }//ends calculateDeviation method  public void loop(){    promptUser();    calculateMean();    calculateDeviation();  }  // public class STDMeanArrayMain {  //main method     public static void main(String[] args) {      STDMeanArray test1 = new STDMeanArray();      test1.loop();    }}//ends class