如何创建扩展类的多个对象

Question

我创建了一个扩展JPanel的类。现在我想创建它的多个对象。我怎么能这样做？

public class TabsPagerAdapter extends FragmentStatePagerAdapter {

    public TabsPagerAdapter(FragmentManager fm) {
        super(fm);
    }

    private final SparseArray<SalesReportList> mPageReferences = new SparseArray<SalesReportList>();


    @Override
    public CharSequence getPageTitle(int position) {
        String title = null;
        switch (position) {
            case 0:
                title = "Mobile";
                break;
            case 1:
                title = "Accessory";
                break;

        }
        return title;
    }

    @Override
    public Fragment getItem(int position) {


        SalesReportList myFragment = SalesReportList.newInstance(position);
        mPageReferences.put(position, myFragment);
        // return  new SalesReportList().newInstance(position);
        return myFragment;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        super.destroyItem(container, position, object);
        mPageReferences.remove(position);
    }


    public SalesReportList getFragment(int key) {
        return mPageReferences.get(key);
    }

    @Override
    public int getCount() {
        return 2;
    }
}

无效。也许让课程没有延长并返回JPanel[] panel = new PanelDraggable [i] (100,100,100,150,scroll); ？

JPanel[]

Answer 1

首先，声明所需object -

的数组

PanelDraggable[] panel = new PanelDraggable [size];

接下来，验证每个对象 -

for (int i=0; i<=size; i++) {
  panel[i] = new PanelDraggable(Your params here);
}