```
public class .. {

TextView txt;

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    txt = (TextView)findViewById(R.id.booom);
    doMethod();
}

ClassOne classOne = new ClassOne();
private void doMethod() {
    classOne.refire(this, classTwo);
}

public ClassTwo classTwo = new ClassTwo (){
    public void nomnom(Double ing){
        txt.setText(String.valueOf(ing); //null point error
    }
}

```

`txt.setText(String.valueOf(ing);` return null pointer error expection once the program is run, if i used `toast` in there without using `txt.setText`, its working fine.

What would be the problem?

Thanks