multiple check or,and in if statement

hi i'm wonder why my if always Toast me : "names Successfully saved!" i'm try every thing.

public void btnSave_Clicked(View view) {
        TextView txtOname = (TextView)findViewById(R.id.txtOname);
        TextView txtXname = (TextView)findViewById(R.id.txtXname);
        String X = txtXname.getText().toString();
        String O = txtOname.getText().toString();
        if((X!="") && (O!="")){
            DatabaseHelper.insertName(getBaseContext(),((TextView)findViewById(R.id.txtOname))
                    .getText().toString());
            DatabaseHelper.insertName(getBaseContext(),((TextView)findViewById(R.id.txtXname))
                    .getText().toString());
            Toast.makeText(this,"names Successfully saved!",Toast.LENGTH_SHORT).show();
        }else{
            Toast.makeText(this,"E",Toast.LENGTH_SHORT).show();
        }
    }
}