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());
}

You may want to use String.format to apply formatting to the number is being displayed. — khachik
– khachik, Commented Dec 7, 2010 at 18:31

Stéphane · Accepted Answer · 2010-12-07 18:29:46Z

4

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

or this works also:

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

answered Dec 7, 2010 at 18:29

Stéphane

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6 Comments

Alphatester77 Over a year ago

Interesting, so if I wanted to extend this to do a simple calc:

Alphatester77 Over a year ago

why doesn't this work? int result = 14 * Integer.valueOf(editStones);

Stéphane Over a year ago

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 Over a year ago

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 Over a year ago

sorry then, should have checked it... it's editStone.getText().toString()

|

darioo · Accepted Answer · 2010-12-07 18:27:47Z

3

Use String.valueOf(result)

answered Dec 7, 2010 at 18:27

darioo

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Comments

Mike C · Accepted Answer · 2010-12-07 18:30:04Z

1

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).

answered Dec 7, 2010 at 18:30

Mike C

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Comments

Nicholas · Accepted Answer · 2010-12-07 18:30:52Z

0

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().

answered Dec 7, 2010 at 18:30

Nicholas

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Comments

Armali · Accepted Answer · 2019-03-19 07:04:29Z

0

You can convert it using many formats as follows-

Convert using Integer.toString(int)

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

Convert using String.valueof(int)
```
String.valueOf(number);
```

Convert using Integer(int).toString()

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

Convert using String.format()

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

edited Mar 19, 2019 at 7:04

Armali

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answered Mar 19, 2019 at 6:40

Dineth Prabashwara

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