Method...Must Override a Superclass Method (Latest SDK)

Question

Possible Duplicate:
Why do I get “must override a superclass method” with @Override?

I recently installed the latest Android SDK in a new eclipse set up on a new machine. When I brought over an old project in several places I got a syntax error concerning @Override stating "method suchandsuch of type suchandsuch must override a superclass method". These items were fixed by removing @Override (which I don't think is correct).

I just made my first new project with my new setup and the initial untouched code is giving this error which has me confused.

package com.geeksonhugs.whenimclose;

import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.NavUtils;
import android.view.MenuItem;

public class ItemListActivity extends FragmentActivity
        implements ItemListFragment.Callbacks {

    private boolean mTwoPane;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_item_list);

        if (findViewById(R.id.item_detail_container) != null) {
            mTwoPane = true;
            ((ItemListFragment) getSupportFragmentManager()
                    .findFragmentById(R.id.item_list))
                    .setActivateOnItemClick(true);
        }
    }

    @Override
    public void onItemSelected(String id) {
        if (mTwoPane) {
            Bundle arguments = new Bundle();
            arguments.putString(ItemDetailFragment.ARG_ITEM_ID, id);
            ItemDetailFragment fragment = new ItemDetailFragment();
            fragment.setArguments(arguments);
            getSupportFragmentManager().beginTransaction()
                    .replace(R.id.item_detail_container, fragment)
                    .commit();

        } else {
            Intent detailIntent = new Intent(this, ItemDetailActivity.class);
            detailIntent.putExtra(ItemDetailFragment.ARG_ITEM_ID, id);
            startActivity(detailIntent);
        }
    }
}

The compiler accepts @Override before onCreate but gives the error with onItemSelected. Can someone please clarify what is going on for me please? Again this syntax error does not occur in prior versions?

Are the java versions the same? I've seen something similar moving from Java 5 to Java 6. — Thomas, Jul 02 '12 at 17:30

score 6 · Accepted Answer · edited Jul 11 '16 at 19:28

6

I think you are using java compiler 1.5, make it 1.6,because @Override of interface's methods is introduced after 1.5.

In Eclipse,

Window -> Preferences -> Java -> Compiler -> Compiler Compliance Level -> select 1.6

edited Jul 11 '16 at 19:28

wcr4

55
8

answered Jul 02 '12 at 17:30

Samir Mangroliya

39,918
16
117
134

but the OP says the compiler is accepting the `@Override` annotation for the onCreate method. – Dan O Jul 02 '12 at 17:36
Ovveride annotation for interface's method is available since java 1.6 – Blackbelt Jul 02 '12 at 17:39
It was at 1.7? Also I installed JDK 7 instead of JDK 6 if that's an issue? – Geeks On Hugs Jul 02 '12 at 17:55
Dont use 1.7 its not compitable,so just change it in 1.6 – Samir Mangroliya Jul 02 '12 at 17:57
I set it to 1.6 but still it does not work. On the preferences screen it says to "make sure I have a 1.6 compliant JRE installed". Is my 1.7 backwards compatible with 1.6? – Geeks On Hugs Jul 02 '12 at 18:02
no need to install ,even i used 1.7 and set compiler level 1.6 it works perfectly. – Samir Mangroliya Jul 02 '12 at 18:06
I've done so and it's still not working :( ... could you please review my settings and note the warning it gives. The second picture includes clicking the "configure" link from the first one. http://imagebin.org/219218 http://imagebin.org/219219 – Geeks On Hugs Jul 02 '12 at 18:16
I cleaned it. And not just superficially, I really got in there and got the gunk out...but still no joy. I restarted eclipse. Cleaned. Rebuilt. :( – Geeks On Hugs Jul 02 '12 at 18:22
i think you should install java1.6 – Samir Mangroliya Jul 02 '12 at 18:23
1

In closing...installing Java 6 didn't help. It turns out "PROJECT SPECIFIC" compiler settings were set for 1.5. Damn! :-( Anyway, on to the next obstacle! :-) – Geeks On Hugs Jul 02 '12 at 19:28
Anthony's last comment was key - it was the Project Specific settings that finally fixed the problem for me. It's not exactly intuitive. – Jeff G Nov 05 '12 at 11:03

Method...Must Override a Superclass Method (Latest SDK)

1 Answers1