public class Node {
private String element;
private Node next;
public void setNext(Node newNext) {
next = newNext;
}
public class SLinkedList {
protected Node head;
protected Node tail;
protected long size;
public void addLast(Node newNode) {
newNode.setNext(null);
tail.setNext(newNode);
tail = newNode;
size = size + 1;
}
public class TestLinkedList {
public static void main(String args[]) {
SLinkedList myList = new SLinkedList();
//create 3 node
Node m = new Node("Tom1", null);
Node n = new Node("Tom2", null);
Node p = new Node("Tom3", null);
//add 1 node at the end
myList.addLast(m);
//print
System.out.println(myList);
System.out.println("Size=\t"+myList.getSize());
}
when executed "myList.addLast(m); it shows nullpointerexception at "tail.setNext(newNode);"
I just wanna know what happen?
In your code,
tail.setNext(newNode); // tail isn't initialized yet
tail = newNode;
Instead do,
tail = newNode;
tail.setNext(newNode);
Related
I have RangeTreeIndex and RangeTreeNode class which I'm using to build the index and after inserting 2500 records, after that, I'm trying to save RangeTreeIndex object in the file where I'm receiving StackOverflowError, below is my entire code:
public class RangeTreeNode<T> implements Serializable {
private static final long serialVersionUID = -1;
public T key;
public Object data;
public RangeTreeNode<T> left;
public RangeTreeNode<T> right;
public RangeTreeNode() {
}
}
public class RangeTreeIndex implements Serializable {
private RangeTreeNode<Number> root;
private RangeTreeNode<Number> firstLeafNode;
private RangeTreeNode<Number> lastLeafNode;
private Number min;
private Number max;
public RangeTreeIndex() {
}
#Override
public int insert(Number key, Object values) {
Number newKey = new Double(key.doubleValue());
if (newKey.doubleValue() < min.doubleValue()) {
min = new Double(key.doubleValue());
}
if (newKey.doubleValue() > max.doubleValue()) {
max = new Double(key.doubleValue());
}
RangeTreeNode<Number> newNode = new RangeTreeNode<>(newKey, values);
this.root = this.insert(root, newNode);
if (firstLeafNode == null && lastLeafNode == null) {
firstLeafNode = newNode;
lastLeafNode = newNode;
} else if (newNode.key.doubleValue() < firstLeafNode.key.doubleValue()) {
firstLeafNode = newNode;
} else if (newNode.key.doubleValue() > lastLeafNode.key.doubleValue()) {
lastLeafNode = newNode;
}
return 1;
}
private RangeTreeNode<Number> insert(RangeTreeNode<Number> parentNode, RangeTreeNode<Number> newNode) {
if (parentNode == null) {
parentNode = newNode;
} else {
if (newNode.key.doubleValue() <= parentNode.key.doubleValue()) {
parentNode.left = insert(parentNode.left, newNode);
} else {
parentNode.right = insert(parentNode.right, newNode);
}
}
return parentNode;
}
}
public class Main {
public static void main(String args[]) throws IOException {
String filePath = "XYZ.jobject";
try (RandomAccessFile raf = new RandomAccessFile(filePath, "rw");
FileOutputStream fOut = new FileOutputStream(raf.getFD());
BufferedOutputStream bos = new BufferedOutputStream(fOut);
ObjectOutputStream oOut = new ObjectOutputStream(bos)) {
oOut.writeObject(preferenceIndex);
}
}
}
Below is the exception I'm receiving:
Exception in thread "Thread-5" java.lang.StackOverflowError
at java.lang.Double.doubleToLongBits(Double.java:836)
at java.io.Bits.putDouble(Bits.java:121)
at java.io.ObjectStreamClass$FieldReflector.getPrimFieldValues(ObjectStreamClass.java:2168)
at java.io.ObjectStreamClass.getPrimFieldValues(ObjectStreamClass.java:1389)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1533)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
...
...
...
...
Even if I'm using Apache commons-lang library class SerializationUtils.serialize with passing only a serializable object it throws the same error.
Can anyone faced this problem like that with primitive values?
I am new to netty and I have a problem using my netty program.
in initConnection method I want to make a different channelpool for each group.
when user group A come in my sendToMessage I want to create channelPool A
like this way user group B come in my sendToMessage I want to create channelPool B and next time if user group A come in again, i will return channelPool A
Is it right to try doing this? Is it possible?
FixedChannelPool error handling
tell me how can I FixedChannelPool error handling? Could I use acquireTimeoutMillis over time.how?
Here is my code
#Service
public class NettyPoolService {
public static final AttributeKey<CompletableFuture<String>> FUTURE = AttributeKey.valueOf("future");
private static final StringDecoder stringDecoder = new StringDecoder(CharsetUtil.UTF_8);
private static final StringEncoder stringEncoder = new StringEncoder(CharsetUtil.UTF_8);
private static ChannelPool channelPool;
private static EventLoopGroup eventLoopGroup;
#Value("${host}")
private String host;
#Value("${port}")
private String port;
#Value("${connection.count}")
private String numberOfConnections;
#Value("${thread.count}")
private String numberOfThreads;
private synchronized void initConnection (String host, int port, int numberOfThreads, int numberOfConnections,String userGroup) {
if ( (channelPool != null) && (eventLoopGroup != null) ) {
return;
}
System.out.println("#############################################");
System.out.println("initConnection start");
eventLoopGroup = new NioEventLoopGroup(numberOfThreads);
Bootstrap bootstrap = new Bootstrap();
bootstrap.option(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT);
bootstrap.option(ChannelOption.SO_KEEPALIVE, true);
//bootstrap.option(ChannelOption.WRITE_BUFFER_HIGH_WATER_MARK, 32 * 1024);
//bootstrap.option(ChannelOption.WRITE_BUFFER_LOW_WATER_MARK, 8 * 1024);
//bootstrap.option(ChannelOption.TCP_NODELAY, true);
bootstrap.group(eventLoopGroup).channel(NioSocketChannel.class).remoteAddress(host, port);
int acquireTimeoutMillis = 10000;
int maxPendingAcquires = Integer.MAX_VALUE;
channelPool = new FixedChannelPool(bootstrap,
new AbstractChannelPoolHandler() {
public void channelCreated(Channel ch) throws Exception {
ChannelPipeline pipeline = ch.pipeline();
// decoders
pipeline.addLast("framer", new DelimiterBasedFrameDecoder(8192, Delimiters.lineDelimiter()));
pipeline.addLast("stringDecoder", stringDecoder);
// encoders
pipeline.addLast("stringEncoder", stringEncoder);
// business logic handler
pipeline.addLast("clientHandler", new ClientPoolHandler(channelPool));
}
},
ChannelHealthChecker.ACTIVE,//eventloop
AcquireTimeoutAction.NEW, //timeout
acquireTimeoutMillis, //
numberOfConnections, //
maxPendingAcquires); //
System.out.println("initConnection End");
System.out.println("#############################################");
}//initConnection
public void sendToMessage(String message,String GroupId) {
System.out.println("=============GroupId=============:"+GroupId);
if (channelPool == null) {
initConnection(host, Integer.parseInt(port.trim()), Integer.parseInt(numberOfThreads.trim()), Integer.parseInt(numberOfConnections.trim()) );
}
final CompletableFuture<String> future = new CompletableFuture<String>();
Future<Channel> channelFuture = channelPool.acquire();
System.out.println("=============channelFuture.get()=============:"+channelFuture.toString());
channelFuture.addListener(new FutureListener<Channel>() {
public void operationComplete(Future<Channel> f) {
if (f.isSuccess()) {
Channel channel = f.getNow();
channel.attr(NettyPoolClientService.FUTURE).set(future);
channel.writeAndFlush(message, channel.voidPromise());
}
}
});
channelFuture.syncUninterruptibly();
}//sendToBnp
}
I am working on android app which fetch data using RecyclerView and Retrofit for parsing JSON Url. I had following tutorial on this Github
My project on Android Studio has no Errors and I'm able to run the Application. But when I open the MainActivity it crashes.
Error that i am get
java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
This is the following line is on setUpAndLoadNativeExpressAds
final NativeExpressAdView adView = (NativeExpressAdView) mRecyclerViewItems.get(i);
This is MainActivity
public class MainActivity extends AppCompatActivity{
public static final int ITEMS_PER_AD = 3;
private static final int NATIVE_EXPRESS_AD_HEIGHT = 150;
private static final String AD_UNIT_ID = ADMOB_NATIVE_MENU_ID;
private StartAppAd startAppAd = new StartAppAd(this);
private RecyclerView mRecyclerView;
private List<Object> mRecyclerViewItems = new ArrayList<>();
private KontenAdapter kontenAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);
// Use this setting to improve performance if you know that changes
// in content do not change the layout size of the RecyclerView.
mRecyclerView.setHasFixedSize(true);
// Specify a linear layout manager.
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(this);
mRecyclerView.setLayoutManager(layoutManager);
// mRecyclerViewItems = new ArrayList<>();
// Update the RecyclerView item's list with menu items and Native Express ads.
// addMenuItemsFromJson();
loadJSON();
// initData();
setUpAndLoadNativeExpressAds();
}
/**
* Adds Native Express ads to the items list.
*/
private void addNativeExpressAds() {
// Loop through the items array and place a new Native Express ad in every ith position in
// the items List.
for (int i = 0; i <= mRecyclerViewItems.size(); i += ITEMS_PER_AD) {
final NativeExpressAdView adView = new NativeExpressAdView(MainActivity.this);
mRecyclerViewItems.add(i, adView);
}
}
/**
* Sets up and loads the Native Express ads.
*/
private void setUpAndLoadNativeExpressAds() {
mRecyclerView.post(new Runnable() {
#Override
public void run() {
final float scale = MainActivity.this.getResources().getDisplayMetrics().density;
// Set the ad size and ad unit ID for each Native Express ad in the items list.
for (int i = 0; i <= mRecyclerViewItems.size(); i += ITEMS_PER_AD) {
final NativeExpressAdView adView = (NativeExpressAdView) mRecyclerViewItems.get(i);
final CardView cardView = (CardView) findViewById(R.id.ad_card_view);
final int adWidth = cardView.getWidth() - cardView.getPaddingLeft()
- cardView.getPaddingRight();
AdSize adSize = new AdSize((int) (adWidth / scale), NATIVE_EXPRESS_AD_HEIGHT);
adView.setAdSize(adSize);
adView.setAdUnitId(AD_UNIT_ID);
}
// Load the first Native Express ad in the items list.
loadNativeExpressAd(0);
}
});
}
/**
* Loads the Native Express ads in the items list.
*/
private void loadNativeExpressAd(final int index) {
if (index >= mRecyclerViewItems.size()) {
return;
}
Object item = mRecyclerViewItems.get(index);
if (!(item instanceof NativeExpressAdView)) {
throw new ClassCastException("Expected item at index " + index + " to be a Native"
+ " Express ad.");
}
final NativeExpressAdView adView = (NativeExpressAdView) item;
// Set an AdListener on the NativeExpressAdView to wait for the previous Native Express ad
// to finish loading before loading the next ad in the items list.
adView.setAdListener(new AdListener() {
#Override
public void onAdLoaded() {
super.onAdLoaded();
// The previous Native Express ad loaded successfully, call this method again to
// load the next ad in the items list.
loadNativeExpressAd(index + ITEMS_PER_AD);
}
#Override
public void onAdFailedToLoad(int errorCode) {
// The previous Native Express ad failed to load. Call this method again to load
// the next ad in the items list.
Log.e("MainActivity", "The previous Native Express ad failed to load. Attempting to"
+ " load the next Native Express ad in the items list.");
loadNativeExpressAd(index + ITEMS_PER_AD);
}
});
// Load the Native Express ad.
adView.loadAd(new AdRequest.Builder().build());
}
private void loadJSON() {
Retrofit retrofit = new Retrofit.Builder()
.baseUrl("https://api.myjson.com/") //https://api.myjson.com/bins/v4dzd
.addConverterFactory(GsonConverterFactory.create())
.build();
RequestInterface request = retrofit.create(RequestInterface.class);
Call<JSONResponse> call = request.getJSON();
call.enqueue(new Callback<JSONResponse>() {
#Override
public void onResponse(Call<JSONResponse> call, Response<JSONResponse> response) {
JSONResponse jsonResponse = response.body();
mRecyclerViewItems = new ArrayList<Object>(Arrays.asList(jsonResponse.getKonten()));
addNativeExpressAds();
RecyclerView.Adapter adapter = new KontenAdapter(mRecyclerViewItems, getApplicationContext());
mRecyclerView.setAdapter(adapter);
}
#Override
public void onFailure(Call<JSONResponse> call, Throwable t) {
Log.d("Error", t.getMessage());
}
});
}
/**
* Adds {#link KontenItem}'s from a JSON file.
*/
private void addMenuItemsFromJson() {
try {
String jsonDataString = readJsonDataFromFile();
JSONArray menuItemsJsonArray = new JSONArray(jsonDataString);
for (int i = 0; i < menuItemsJsonArray.length(); ++i) {
JSONObject menuItemObject = menuItemsJsonArray.getJSONObject(i);
String menuItemName = menuItemObject.getString("name");
String menuItemDescription = menuItemObject.getString("description");
String menuItemPrice = menuItemObject.getString("price");
String menuItemCategory = menuItemObject.getString("category");
String menuItemImageName = menuItemObject.getString("photo");
String menuItemUrl = menuItemObject.getString("url");
KontenItem kontenItem = new KontenItem(menuItemName, menuItemDescription, menuItemPrice,
menuItemCategory, menuItemImageName, menuItemUrl);
mRecyclerViewItems.add(kontenItem);
}
} catch (IOException | JSONException exception) {
Log.e(MainActivity.class.getName(), "Unable to parse JSON file.", exception);
}
}
/**
* Reads the JSON file and converts the JSON data to a {#link String}.
*
* #return A {#link String} representation of the JSON data.
* #throws IOException if unable to read the JSON file.
*/
private String readJsonDataFromFile() throws IOException {
InputStream inputStream = null;
StringBuilder builder = new StringBuilder();
try {
String jsonDataString = null;
inputStream = getResources().openRawResource(R.raw.menu_items_json);
BufferedReader bufferedReader = new BufferedReader(
new InputStreamReader(inputStream, "UTF-8"));
while ((jsonDataString = bufferedReader.readLine()) != null) {
builder.append(jsonDataString);
}
} finally {
if (inputStream != null) {
inputStream.close();
}
}
return new String(builder);
}
}
This is MyAdapter
public class KontenAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
// A menu item view type.
private static final int MENU_ITEM_VIEW_TYPE = 0;
// The Native Express ad view type.
private static final int NATIVE_EXPRESS_AD_VIEW_TYPE = 1;
// An Activity's Context.
private final Context mContext;
// The list of Native Express ads and menu items.
private final List<Object> mRecyclerViewItems;
public KontenAdapter(List<Object> recyclerViewItems, Context context) {
this.mContext = context;
this.mRecyclerViewItems = recyclerViewItems;
}
/**
* The {#link MenuItemViewHolder} class.
* Provides a reference to each view in the menu item view.
*/
public class MenuItemViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
private TextView menuItemName;
private TextView menuItemDescription;
private TextView menuItemPrice;
private TextView menuItemCategory;
private ImageView menuItemImage;
private TextView menuItemUrl;
MenuItemViewHolder(View view) {
super(view);
menuItemImage = (ImageView) view.findViewById(R.id.menu_item_image);
menuItemName = (TextView) view.findViewById(R.id.menu_item_name);
menuItemPrice = (TextView) view.findViewById(R.id.menu_item_price);
menuItemCategory = (TextView) view.findViewById(R.id.menu_item_category);
menuItemDescription = (TextView) view.findViewById(R.id.menu_item_description);
menuItemUrl = (TextView) view.findViewById(R.id.menu_item_url);
view.setOnClickListener(this);
}
#Override
public void onClick(View v) {
Intent detailIntent = new Intent(v.getContext(), PostActivity.class);
detailIntent.putExtra("name",menuItemName.getText().toString() );
detailIntent.putExtra("url", menuItemUrl.getText().toString());
mContext.startActivity(detailIntent);
}
}
/**
* The {#link NativeExpressAdViewHolder} class.
*/
public class NativeExpressAdViewHolder extends RecyclerView.ViewHolder {
NativeExpressAdViewHolder(View view) {
super(view);
}
}
#Override
public int getItemCount() {
return mRecyclerViewItems.size();
}
/**
* Determines the view type for the given position.
*/
#Override
public int getItemViewType(int position) {
return (position % MainActivity.ITEMS_PER_AD == 0) ? NATIVE_EXPRESS_AD_VIEW_TYPE
: MENU_ITEM_VIEW_TYPE;
}
/**
* Creates a new view for a menu item view or a Native Express ad view
* based on the viewType. This method is invoked by the layout manager.
*/
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
switch (viewType) {
case MENU_ITEM_VIEW_TYPE:
View menuItemLayoutView = LayoutInflater.from(viewGroup.getContext()).inflate(
R.layout.menu_item_container, viewGroup, false);
return new MenuItemViewHolder(menuItemLayoutView);
case NATIVE_EXPRESS_AD_VIEW_TYPE:
// fall through
default:
View nativeExpressLayoutView = LayoutInflater.from(
viewGroup.getContext()).inflate(R.layout.native_express_ad_container,
viewGroup, false);
return new NativeExpressAdViewHolder(nativeExpressLayoutView);
}
}
/**
* Replaces the content in the views that make up the menu item view and the
* Native Express ad view. This method is invoked by the layout manager.
*/
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
int viewType = getItemViewType(position);
switch (viewType) {
case MENU_ITEM_VIEW_TYPE:
MenuItemViewHolder menuItemHolder = (MenuItemViewHolder) holder;
KontenItem kontenItem = (KontenItem) mRecyclerViewItems.get(position);
// Get the menu item image resource ID.
String imageName = kontenItem.getImageName();
int imageResID = mContext.getResources().getIdentifier(imageName, "drawable",
mContext.getPackageName());
// Add the menu item details to the menu item view.
menuItemHolder.menuItemImage.setImageResource(imageResID);
menuItemHolder.menuItemName.setText(kontenItem.getName());
menuItemHolder.menuItemPrice.setText(kontenItem.getPrice());
menuItemHolder.menuItemCategory.setText(kontenItem.getCategory());
menuItemHolder.menuItemDescription.setText(kontenItem.getDescription());
menuItemHolder.menuItemUrl.setText(kontenItem.getInstructionUrl());
break;
case NATIVE_EXPRESS_AD_VIEW_TYPE:
// fall through
default:
NativeExpressAdViewHolder nativeExpressHolder =
(NativeExpressAdViewHolder) holder;
NativeExpressAdView adView =
(NativeExpressAdView) mRecyclerViewItems.get(position);
ViewGroup adCardView = (ViewGroup) nativeExpressHolder.itemView;
// The NativeExpressAdViewHolder recycled by the RecyclerView may be a different
// instance than the one used previously for this position. Clear the
// NativeExpressAdViewHolder of any subviews in case it has a different
// AdView associated with it, and make sure the AdView for this position doesn't
// already have a parent of a different recycled NativeExpressAdViewHolder.
if (adCardView.getChildCount() > 0) {
adCardView.removeAllViews();
}
if (adView.getParent() != null) {
((ViewGroup) adView.getParent()).removeView(adView);
}
// Add the Native Express ad to the native express ad view.
adCardView.addView(adView);
}
}
}
KontenItem.java
class KontenItem {
private final String name;
private final String description;
private final String price;
private final String category;
private final String imageName;
private final String instructionUrl;
public KontenItem(String name, String description, String price, String category,
String imageName, String instructionUrl) {
this.name = name;
this.description = description;
this.price = price;
this.category = category;
this.imageName = imageName;
this.instructionUrl = instructionUrl;
}
public String getName() {
return name;
}
public String getDescription() {
return description;
}
public String getPrice() {
return price;
}
public String getCategory() {
return category;
}
public String getImageName() {
return imageName;
}
public String getInstructionUrl() {
return instructionUrl;
}
}
Thanks in advance!
You are calling addNativeExpressAds() and
for (int i = 0; i <= mRecyclerViewItems.size(); i += ITEMS_PER_AD) {
final NativeExpressAdView adView = (NativeExpressAdView) mRecyclerViewItems.get(i);
in different threads. So, mRecyclerViewItems.get(i) is used before its initialization.
I would suggest to use
#Override
public void onResponse(Call<JSONResponse> call, Response<JSONResponse> response) {
JSONResponse jsonResponse = response.body();
mRecyclerViewItems = new ArrayList<Object>(Arrays.asList(jsonResponse.getKonten()));
addNativeExpressAds();
RecyclerView.Adapter adapter = new KontenAdapter(mRecyclerViewItems, getApplicationContext());
mRecyclerView.setAdapter(adapter);
setUpAndLoadNativeExpressAds(); // << ADD THIS METHOD HERE AND REMOVE THE OTHER CALLING
}
Your problem is that mRecyclerViewItems is a zero based array/collection. Yet in setUpAndLoadNativeExpressAds() you will iterate even if you have no elements, and then ask for element 0.
for (int i = 0; i <= mRecyclerViewItems.size(); i += ITEMS_PER_AD) {
final NativeExpressAdView adView = (NativeExpressAdView) mRecyclerViewItems.get(i);
..
}
you should instead
for (int i = 0; i < mRecyclerViewItems.size(); i += ITEMS_PER_AD) {
..
}
I'm using robotium to test an application. In my test class have 2 tests:
public class MainActivityTestAll extends ActivityInstrumentationTestCase2<MainActivity> {
private Solo solo;
private static TestItem item;
private boolean isTimeOut;
private ArrayList<Button> arrButton;
private static final String USER_NAME = "varick";
private static final String PASSWORD = "123456";
private static final String BTN_DISMISS = "Dismiss";
private static final String BTN_OK = "OK";
private static final String BTN_TRYAGAIN = "Try Again";
private static final String BTN_CANCEL = "Cancel";
private static final String BTN_GETSTARTED = "Get Started";
private static final String BTN_EXIT = "Exit";
private static EditText edtName, edtPass;
private View inflaterView;
private Button btnLight, btnSwitch, btnOutlet;
public MainActivityTestAll(String name) {
super(MainActivity.class);
setName(name);
}
public void setUp() throws Exception {
solo = new Solo(getInstrumentation(), getActivity());
edtName = (EditText) solo.getView(R.id.edittext_userName);
edtPass = (EditText) solo.getView(R.id.edittext_passWord);
LayoutInflater i = (LayoutInflater) getActivity().getSystemService(
Context.LAYOUT_INFLATER_SERVICE);
inflaterView = i.inflate(R.layout.consumer_welcome, null);
isTimeOut = true;
item = new TestItem();
}
#MediumTest
public void test1_DoorLock_Click() throws Exception {
Login();
View view = (View) solo.getView(R.id.fragment_holder);
solo.waitForView(view);
solo.clickOnView(view);
solo.waitForActivity(ConsumerSystemMapDetailPhone.class.getName());
btnLight = (Button) solo.getView(R.id.btnLight);
btnSwitch = (Button) solo.getView(R.id.btnSwitch);
btnOutlet = (Button) solo.getView(R.id.btnOutlet);
assertNotNull(btnLight);
assertNotNull(btnSwitch);
assertNotNull(btnOutlet);
solo.clickOnView(btnLight);
solo.clickOnView(btnSwitch);
solo.clickOnView(btnOutlet);
solo.sleep(2000);
arrButton = solo.getCurrentViews(Button.class,
solo.getView(R.id.consumerzoom_main_container));
assertTrue("DoorLock button had not active", clickonDoorlock(arrButton.get(0)));
}
#MediumTest
public void test2_Switch_Click() throws Exception{
/*
btnLight = (Button) solo.getView(R.id.btnLight);
btnOutlet = (Button) solo.getView(R.id.btnOutlet);
assertNotNull(btnLight);
assertNotNull(btnOutlet);
solo.clickOnView(btnLight);
solo.clickOnView(btnOutlet);
*/
btnSwitch = (Button) solo.getView(R.id.btnSwitch);
assertNotNull(btnSwitch);
solo.clickOnView(btnSwitch);
solo.sleep(2000);
clickonSpinner(1, 3);
solo.sleep(1000);
arrButton = solo.getCurrentViews(Button.class, solo.getView(R.id.consumerzoom_main_container));
clickonSwitch(arrButton.get(0), true, item.getbtnLevel2());
clickonSpinner(0, 1);
clickonSpinner(1, 4);
solo.sleep(1000);
arrButton = solo.getCurrentViews(Button.class, solo.getView(R.id.consumerzoom_main_container));
clickonSwitchInfortop(arrButton.get(0), false, item.getbtnParentLevel8(), item.getbtnLevel3());
exitApp();
}
My problem is after test1 finish the test2 do nothing. It still running but do nothing. When I put the code from test2 into test1 it run ok.
I'm not sure what's wrong here but I guess the reason is because the test2 doesn't start from MainActivity.
I think it's because you are missing tearDown method:
#Override
public void tearDown() throws Exception {
solo.finishOpenedActivities();
}
JPanel p2 = new JPanel(new GridLayout(6,1));
ButtonGroup tubtype = new ButtonGroup();
JRadioButton roundrButton = new JRadioButton("Round", true);
tubtype.add(roundrButton);
JRadioButton ovalrButton = new JRadioButton("Oval", false);
tubtype.add(ovalrButton);
calcButton = new JButton("Calculate Volume");
exitButton = new JButton("Exit");
hlength = new JTextField(5);
hwidth = new JTextField(5);
hdepth = new JTextField(5);
hvolume = new JTextField(5);
lengthLabel = new JLabel("Enter the tub's length (ft):");
widthLabel = new JLabel("Enter the tub's width (ft):");
depthLabel = new JLabel("Enter the tub's depth (ft):");
volumeLabel = new JLabel("The tub's volume (ft^3):");
p2.add(roundrButton);
p2.add(ovalrButton);
p2.add(lengthLabel);
p2.add(hlength);
p2.add(widthLabel);
p2.add(hwidth);
p2.add(depthLabel);
p2.add(hdepth);
p2.add(volumeLabel);
p2.add(hvolume);
p2.add(calcButton);
p2.add(exitButton);
tab.addTab( "Hot Tubs", null, p2, " Panel #1" );
calcButtonHandler2 ihandler =new calcButtonHandler2();
calcButton.addActionListener(ihandler);
exitButtonHandler ghandler =new exitButtonHandler();
exitButton.addActionListener(ghandler);
FocusHandler hhandler =new FocusHandler();
hlength.addFocusListener(hhandler);
hwidth.addFocusListener(hhandler);
hdepth.addFocusListener(hhandler);
hvolume.addFocusListener(hhandler);
// add JTabbedPane to container
getContentPane().add( tab );
setSize( 550, 500 );
setVisible( true );
}
public class calcButtonHandler implements ActionListener {
public void actionPerformed(ActionEvent e) {
DecimalFormat num =new DecimalFormat(",###.##");
double sLength, sWidth, sdepth, Total;
sLength = Double.valueOf(plength.getText());
sWidth =Double.valueOf(pwidth.getText());
sdepth =Double.valueOf(pdepth.getText());
if(e.getSource() == pcalcButton) {
Total = sLength * sWidth * sdepth;
pvolume.setText(num.format(Total));
try{
String value=pvolume.getText();
File file = new File("output.txt");
FileWriter fstream = new FileWriter(file,true);
BufferedWriter out = new BufferedWriter(fstream);
out.write("Length= "+sLength+", Width= "+sWidth+", Depth= "+sdepth+" so the volume of Swimming Pool is "+value);
out.newLine();
out.close();
}
catch(Exception ex){}
}
}
}
public class calcButtonHandler2 implements ActionListener {
public void actionPerformed(ActionEvent g) {
DecimalFormat num =new DecimalFormat(",###.##");
double cLength, cWidth, cdepth, Total;
cLength = Double.valueOf(hlength.getText());
cWidth = Double.valueOf(hwidth.getText());
cdepth = Double.valueOf(hdepth.getText());
try
{
AbstractButton roundrButton;
if(roundrButton.isSelected())
{
Total = Math.PI * Math.pow(cLength / 2.0, 2) * cdepth;
}
else
{
Total = Math.PI * Math.pow(cLength * cWidth, 2) * cdepth;
}
hvolume.setText(""+num.format(Total));
}
catch(Exception ex){}
}
}
}
class exitButtonHandler implements ActionListener {
public void actionPerformed(ActionEvent g){
System.exit(0);
}
}
class FocusHandler implements FocusListener {
public void focusGained(FocusEvent e) {
}
public void focusLost(FocusEvent e) {
}
public static void main( String args[] )
{
Final tabs = new Final();
tabs.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
}
I am getting an error that says my roundrButton may not have been initialized. Please help.
The problem is these lines here:
try
{
AbstractButton roundrButton;
if(roundrButton.isSelected())
{
You're declaring a variable called roundrButton, and then attempting to call .isSelected() on it. You never assign anything to roundButton, though, so it is going to be null.
It seems like you might want to be referring to the roundrButton that you declared earlier. Have you considered making it a field of your class?
The error happens here:
try {
AbstractButton roundrButton;
if (roundrButton.isSelected()) {
You declared a variable called roundrButton but did not assign any object to it.
Then you called a method on, well, who knows? There is no object on which to call the method, because the variable roundrButton never received a value.
I guess your problem is in method actionPerformed of class calcButtonHandler2 :
try {
AbstractButton roundrButton;
if(roundrButton.isSelected())
roundrButton is indeed not initialized and it will lead to a NullPointerException at runtime.