### opdracht 3 ###

### activity_main.xml ###


<androidx.constraintlayout.widget...>

    <Button
        ...
        android:onClick="initStudent"
        .../>

</androidx.constraintlayout.widget.ConstraintLayout>

### MainActivity.java ###

public class MainActivity extends AppCompatActivity {

	...

    public void initStudent (View view) {

        EditText studentNaam = (EditText)findViewById(R.id.editTextStudentNaam);
        EditText studentNummer = (EditText)findViewById(R.id.editTextStudentNummer);
        EditText studentCijfer = (EditText)findViewById(R.id.editTextStudentCijfer);

        String Naam = studentNaam.getText().toString();
        int Nummer = Integer.parseInt(studentNummer.getText().toString());
        Double Cijfer = Double.parseDouble(studentCijfer.getText().toString());

        Student s = new Student(Naam,Nummer,Cijfer);

        String varMessage1 = Double.toString(s.getStudentCijfer());
        TextView myTextView = (TextView)findViewById(R.id.textView1);
        myTextView.setText(varMessage1);
        
    }

    ...
    
}