How to parse a double from EditText to TextView? (Android)

Question

I\'m realy beginning to learn Java. When I run this code everything works fine till I leave my EditText boxes in the from empty and hit the run button. Then I get:

Answer 1

Another improvement:

String thisIsIt = new Double(tvSumIn).toString();

if(tvSumIn < 2){
    noSum.setText(thisIsIt + " This is it ");
}else{
    noSum.setText("This is else");
}

could be:

if(tvSumIn < 2){
    noSum.setText(tvSumIn + " This is it ");
}else{
    noSum.setText("This is else");
}

Then you don't have to create a useless String