some simple tests

ModifyArrayAndElement.java

package com.example.deniz.modifyarrayandelement;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;

import org.w3c.dom.Text;

public class MainActivity extends AppCompatActivity {

    TextView txtModifiedArrayElement;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        TextView txtOrginalValuesOFArray = (TextView) findViewById(R.id.txtOrginalValuesOfArray);
        TextView txtValuesOfModifiedArray = (TextView) findViewById(R.id.txtValiesOfModifiedArray);
         txtModifiedArrayElement = (TextView) findViewById(R.id.txtModifiedArrayElement);
        TextView txtOrginalArrayElement = (TextView) findViewById(R.id.txtOrginalArrayElment);
        TextView txtArrayElementValueAfterModification = (TextView) findViewById(R.id.txtValueofArrayElementAfterModification);

        String[] stringArray = {"A\n", "B\n", "C\n", "D\n", "E\n", "F\n", "G\n",
                                    "H\n", "I\n", "J\n", "K\n", "L\n", "M\n", "O\n",
                                        "P\n", "Q\n", "R\n", "S\n", "T\n", "U\n", "V\n",
                                            "W\n", "X\n", "Y\n", "Z\n"};


        String totalOrginalValues = "";

        for(String value : stringArray){
            totalOrginalValues += value;
        }

        txtOrginalValuesOFArray.setText(totalOrginalValues);

        modify(stringArray);

        totalOrginalValues = "";

        for(String value : stringArray){

            totalOrginalValues += value;

        }

        txtValuesOfModifiedArray.setText(totalOrginalValues);


        txtOrginalArrayElement.setText(stringArray[5]);

        modifyElement(stringArray[5]);

        txtArrayElementValueAfterModification.setText(stringArray[5]);

    }

    public void modify(String[] array){

        for(int i=0; i<array.length;i++){

            array[i]="$"+array[i];

        }

    }

    public void modifyElement (String element){
        element = "@#" + element;
        txtModifiedArrayElement.setText(element);
    }
}