Incredibly simple android java question

Question

How can I convert the below int to display the result of the sum as text in a textview?

Am getting 'cannot invoke toString() on primitive type int' - thought that was the point of toString!?!

public void onClick(View v) {
 // TODO Auto-generated method stub
 txtAnswer = (TextView)findViewById(R.id.txtAnswer);
 editStones = (EditText)findViewById(R.id.editStones);
 int result = 10 + 10;
 txtAnswer.setText(result.toString());
}

• khachik: You may want to use String.format to apply formatting to the number is being displayed.

Answer 1

txtAnswer.setText(String.valueOf(result));

or this works also:

txtAnswer.setText("result is : "+result);

• Alphatester77: Interesting, so if I wanted to extend this to do a simple calc:
• Alphatester77: why doesn't this work? int result = 14 * Integer.valueOf(editStones)
• Stéphane: editStone is an EditText object, you need to do editStone.getText() to get the string content (a String object). So the correct syntax is : int result = 14 * Integer.ValueOf(editStone.getText())
• Alphatester77: That makes total sense, except it's highlighting 'valueOf' and telling me: The method valueOf(String) in the type Integer is not applicable for the arguments (Editable)
• Stéphane: sorry then, should have checked it... it's editStone.getText().toString()

Answer 2

Use String.valueOf(result)

Answer 3

int is a primitive type in Java, meaning it is not a class, and therefore has no toString() method. You can use the Integer class or just use String.valueOf(result).

Answer 4

One of the more annoying things about java is that they still have primitives. So you have to use a Static Method of another class, either String.valueOf() or Integer.toString().

Answer 5

You can convert it using many formats as follows-

1. Convert using Integer.toString(int)

   int number = -782;
   String numberAsString = Integer.toString(number);
   

2. Convert using String.valueof(int)

   String.valueOf(number);
   

3. Convert using Integer(int).toString()

   String numberAsString = new Integer(number).toString();
   

4. Convert using String.format()

   String numberAsString = String.format ("%d", number);