问安卓NullPointer错误片段自定义类？

EN

 public class DpsFragment extends Fragment {
    Weapon weppy;

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

            weppy.setMaxdmg(200);
            weppy.setMindmg(100);
            TextView tv= (TextView) getView().findViewById(R.id.textView1); 
            tv.setText("hello");


            return inflater.inflate(R.layout.dpsfrag, container, false);

        }

    public class Weapon {
    private int mindmg;
    private int maxdmg;


    public Weapon(int mindmg, int maxdmg) {
    this.setMindmg(mindmg);
    this.setMaxdmg(maxdmg);
    }


    public int getMindmg() {
    return mindmg;
    }


    public void setMindmg(int mindmg) {
    this.mindmg = mindmg;
    }


    public int getMaxdmg() {
    return maxdmg;
    }


    public void setMaxdmg(int maxdmg) {
    this.maxdmg = maxdmg;
}
}}