How to extract integers from alphanumeric string in your Android App?

In this video it shows how one can extract or filter all the digits (integers) from any alphanumeric string/ texts.

It uses replaceAll method of the string to replace any non-numeric character with null (that is delete the non-numeric characters).

One can also convert the numerical string into int data type by using the below API:

Complete source code and other details/ steps of this video are posted in the below link:

However, the main Java code is copied below also for reference:

public class MainActivity extends AppCompatActivity {

private TextView textView;
private EditText editText;

@Override
protected void onCreate(Bundle savedInstanceState) {

}

public void buttonExtractIntegersFromString(View view){
}
}

-