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package com.example.activity;
 
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;
 
public class MainActivity extends ActionBarActivity {
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        if (savedInstanceState == null) {
            getSupportFragmentManager().beginTransaction()
                    .add(R.id.container, new PlaceholderFragment())
                    .commit();
        }
    }
 
 
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
 
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
 
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
 
    /**
     * A placeholder fragment containing a simple view.
     */
    public static class PlaceholderFragment extends Fragment {
 
 
        @Override
        public void onActivityCreated(Bundle savedInstanceState) {
            super.onActivityCreated(savedInstanceState);
        }
    }
 
}
 

Main.java:14: error: class MainActivity is public, should be declared in a file named MainActivity.java
public class MainActivity extends ActionBarActivity {
       ^
Main.java:3: error: package android.support.v7.app does not exist
import android.support.v7.app.ActionBarActivity;
                             ^
Main.java:4: error: package android.support.v7.app does not exist
import android.support.v7.app.ActionBar;
                             ^
Main.java:5: error: package android.support.v4.app does not exist
import android.support.v4.app.Fragment;
                             ^
Main.java:6: error: package android.os does not exist
import android.os.Bundle;
                 ^
Main.java:7: error: package android.view does not exist
import android.view.LayoutInflater;
                   ^
Main.java:8: error: package android.view does not exist
import android.view.Menu;
                   ^
Main.java:9: error: package android.view does not exist
import android.view.MenuItem;
                   ^
Main.java:10: error: package android.view does not exist
import android.view.View;
                   ^
Main.java:11: error: package android.view does not exist
import android.view.ViewGroup;
                   ^
Main.java:12: error: package android.os does not exist
import android.os.Build;
                 ^
Main.java:14: error: cannot find symbol
public class MainActivity extends ActionBarActivity {
                                  ^
  symbol: class ActionBarActivity
Main.java:17: error: cannot find symbol
    protected void onCreate(Bundle savedInstanceState) {
                            ^
  symbol:   class Bundle
  location: class MainActivity
Main.java:30: error: cannot find symbol
    public boolean onCreateOptionsMenu(Menu menu) {
                                       ^
  symbol:   class Menu
  location: class MainActivity
Main.java:38: error: cannot find symbol
    public boolean onOptionsItemSelected(MenuItem item) {
                                         ^
  symbol:   class MenuItem
  location: class MainActivity
Main.java:52: error: cannot find symbol
    public static class PlaceholderFragment extends Fragment {
                                                    ^
  symbol:   class Fragment
  location: class MainActivity
Main.java:56: error: cannot find symbol
        public void onActivityCreated(Bundle savedInstanceState) {
                                      ^
  symbol:   class Bundle
  location: class PlaceholderFragment
Main.java:18: error: cannot find symbol
        super.onCreate(savedInstanceState);
        ^
  symbol:   variable super
  location: class MainActivity
Main.java:19: error: package R does not exist
        setContentView(R.layout.activity_main);
                        ^
Main.java:23: error: package R does not exist
                    .add(R.id.container, new PlaceholderFragment())
                          ^
Main.java:22: error: cannot find symbol
            getSupportFragmentManager().beginTransaction()
            ^
  symbol:   method getSupportFragmentManager()
  location: class MainActivity
Main.java:16: error: method does not override or implement a method from a supertype
    @Override
    ^
Main.java:33: error: package R does not exist
        getMenuInflater().inflate(R.menu.main, menu);
                                   ^
Main.java:33: error: cannot find symbol
        getMenuInflater().inflate(R.menu.main, menu);
        ^
  symbol:   method getMenuInflater()
  location: class MainActivity
Main.java:29: error: method does not override or implement a method from a supertype
    @Override
    ^
Main.java:43: error: package R does not exist
        if (id == R.id.action_settings) {
                   ^
Main.java:46: error: cannot find symbol
        return super.onOptionsItemSelected(item);
               ^
  symbol:   variable super
  location: class MainActivity
Main.java:37: error: method does not override or implement a method from a supertype
    @Override
    ^
Main.java:57: error: cannot find symbol
            super.onActivityCreated(savedInstanceState);
            ^
  symbol:   variable super
  location: class PlaceholderFragment
Main.java:55: error: method does not override or implement a method from a supertype
        @Override
        ^
30 errors

Standard output is empty