Android : This method requires a body instead of semicolon

I don't know maybe I am so exhausted that I can not figure out my obvious mistake, but if you can help me, you let me go to sleep :)

Here I create a method in order to add a Spinner inside a dialog in my android application:

  public void spinnerGenerate(String[] s){

        ArrayAdapter<String> adb = new ArrayAdapter<String>(MtActivity.this,R.layout.simple_spinner_item, s);
        Spinner sp = new Spinner(MtActivity.this);
        sp.setAdapter(adb);

        AlertDialog.Builder builder = new AlertDialog.Builder(MtActivity.this);
        builder.setView(sp);
        builder.create().show();


    } 

Now I want to test it, so I define a String array and call the method:

    String[] testArray = {"aaa","bbb","ccc","ddd"};
    spinnerGenerate(testArray);

BUT, I have got these errors:

Return type for the method is missing   
This method requires a body instead of a semicolon  
Syntax error on token "testArray", VariableDeclaratorId expected after this token