我有一个简单的程序，抛出异常，我理解输出，但不是我得到的异常。 这是代码：
//Q1.java
import java.io.*;
import java.util.*;
public class Q1{
public static void main(String args[]){
Q1 q1=new Q1();
Q2 q2=new Q2();
try{
System.out.println(q2.method(q1));
System.out.println(q2.method(q2));
}catch(QE1 e){
System.out.println("exception 1");
}finally{
System.out.println("finally");
}
}
Object method(Q1 q) throws QE1{
if(q instanceof Q1){
System.out.println("method");
}
else {
throw new QE2();
}
return 1;
}
}
class Q2 extends Q1{
Object method(Q1 q) throws QE1{
if(errorCheck()&& q instanceof Q2){
throw new QE2("error 2");
}else if(q instanceof Q2){
throw new QE1();
}else{
return new String("abc");
}
}
boolean errorCheck(){
return true;
}
}
class QE1 extends Throwable{
public QE1(){
System.out.println("qe1 - 1");
}
public QE1(String s){
super(s);
System.out.println("qe1 - 2");
}
}
class QE2 extends RuntimeException {
public QE2(){
System.out.println("qe2 - 1");
}
public QE2(String s){
this();
System.out.println("qe2 - 2");
}
}
输出是：
abc
qe2 - 1
qe2 - 2
finally
QE2
at Q2.method(Q1.java:33)
at Q1.main(Q1.java:10)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at edu.rice.cs.drjava.model.compiler.JavacCompiler.runCommand(JavacCompiler.java:272)
然后程序中断，但我不确定原因。
是这种情况还是其他什么？
答案 0 :(得分：1)
您的代码的输出/行为没有任何意外。
public class HomeFragment extends Fragment implements OnItemClickListener, OnClickListener, MainActivity.OnLocationListener {
private View viewInflate;
DisplayImageOptions options;
ArrayList<Store> storeList;
ArrayList<News> newsList;
MGAsyncTask task;
Queries q;
private Store store;
Random rand = new Random();
public HomeFragment() { }
@SuppressLint("InflateParams")
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
viewInflate = inflater.inflate(R.layout.fragment_home, null);
return viewInflate;
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
}
@Override
public void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
if(task != null)
task.cancel(true);
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onViewCreated(view, savedInstanceState);
options = new DisplayImageOptions.Builder()
.showImageOnLoading(UIConfig.SLIDER_PLACEHOLDER)
.showImageForEmptyUri(UIConfig.SLIDER_PLACEHOLDER)
.showImageOnFail(UIConfig.SLIDER_PLACEHOLDER)
.cacheInMemory(true)
.cacheOnDisk(true)
.considerExifParams(true)
.bitmapConfig(Bitmap.Config.RGB_565)
.build();
storeList = new ArrayList<Store>();
newsList = new ArrayList<News>();
MainActivity main = (MainActivity) getActivity();
timer();
main.showSwipeProgress();
main.getDebugKey();
q = main.getQueries();
if(MGUtilities.isLocationEnabled(getActivity())) {
if(MainActivity.location == null) {
main.setOnLocationListener(this);
}
else {
Handler h = new Handler();
h.postDelayed(new Runnable() {
@Override
public void run() {
getData();
}
}, Config.DELAY_SHOW_ANIMATION);
}
}
else {
main.setOnLocationListener(this);
}
}
public void getData() {
task = new MGAsyncTask(getActivity());
task.setMGAsyncTaskListener(new OnMGAsyncTaskListener() {
@Override
public void onAsyncTaskProgressUpdate(MGAsyncTask asyncTask) {
}
@Override
public void onAsyncTaskPreExecute(MGAsyncTask asyncTask) {
asyncTask.dialog.hide();
}
@Override
public void onAsyncTaskPostExecute(MGAsyncTask asyncTask) {
// TODO Auto-generated method stub
if(!MGUtilities.hasConnection(getActivity())) {
ArrayList<Store> stores = q.getStoresFeatured();
ArrayList<News> news = q.getNews();
if (Config.HOME_STORE_FEATURED_COUNT != -1 && Config.RANK_STORES_ACCORDING_TO_NEARBY) {
Log.v("myApp", "STORE SLIDER THING - STORE SLIDER THING - STORE SLIDER THING - STORE SLIDER THING - STORE SLIDER THING - STORE SLIDER THING - " );
int storeCount = stores.size() < Config.HOME_STORE_FEATURED_COUNT ?
stores.size() : Config.HOME_STORE_FEATURED_COUNT;
if (MainActivity.location != null) {
for (Store store : stores) {
Location locStore = new Location("Store");
locStore.setLatitude(store.getLat());
locStore.setLongitude(store.getLon());
double userDistanceFromStore = MainActivity.location.distanceTo(locStore) / 1000;
store.setDistance(userDistanceFromStore);
}
Collections.sort(stores, new Comparator<Store>() {
@Override
public int compare(Store store, Store t1) {
if (store.getDistance() < t1.getDistance())
return -1;
if (store.getDistance() > t1.getDistance())
return 1;
return 0;
}
});
}
storeList = new ArrayList<Store>();
for (int x = 0; x < storeCount; x++) {
storeList.add(stores.get(x));
}
} else {
storeList = stores;
}
if (Config.HOME_NEWS_COUNT != -1 && Config.RANK_STORES_ACCORDING_TO_NEARBY) {
Log.v("myApp", "NEWS SLIDER THING - NEWS SLIDER THING - NEWS SLIDER THING - NEWS SLIDER THING - NEWS SLIDER THING - NEWS SLIDER THING - " );
int newsCount = news.size() < Config.HOME_NEWS_COUNT ? news.size() : Config.HOME_NEWS_COUNT;
newsList = new ArrayList<News>();
for (int x = 0; x < newsCount; x++) {
newsList.add(news.get(x));
}
} else {
newsList = news;
}
}
createSlider();
showList();
MainActivity main = (MainActivity) getActivity();
main.hideSwipeProgress();
}
@Override
public void onAsyncTaskDoInBackground(MGAsyncTask asyncTask) {
// TODO Auto-generated method stub
TextView tvTitleHeaderr = (TextView) viewInflate.findViewById(R.id.all);
if( MGUtilities.hasConnection(getActivity()) && MainActivity.location != null) {
try {
UserAccessSession accessSession = UserAccessSession.getInstance(getActivity());
String strUrl = "";
if(accessSession.getFilterDistance() == 0) {
Log.v("myApp", "STRURL - STRURL - STRURL - STRURL - STRURL - STRURL - STRURL - STRURL - STRURL - STRURL - " );
if(MGUtilities.hasConnection(getActivity())) {
try {
strUrl = String.format("%s?api_key=%s",
Config.GET_CATEGORIES_JSON_URL,
Config.API_KEY);
DataParser parser = new DataParser();
Data data = parser.getData(strUrl);
MainActivity main = (MainActivity) getActivity();
if (main == null)
return;
Queries q = main.getQueries();
if (data == null)
return;
q.deleteTable("categories");
if (data.getCategories() != null && data.getCategories().size() > 0) {
Log.v("myApp", "CATEGORYS - CATEGORYS - CATEGORYS - CATEGORYS - CATEGORYS - CATEGORYS - CATEGORYS - CATEGORYS - " );
for (Category cat : data.getCategories()) {
q.insertCategory(cat);
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
strUrl = String.format("%s?api_key=%s&lat=%f&lon=%f&radius=%f&news_count=%d&featured_count=%d&default_store_count_to_find_distance=%d",
Config.GET_HOME_STORES_NEWS_JSON_URL,
Config.API_KEY,
MainActivity.location.getLatitude(),
MainActivity.location.getLongitude(),
accessSession.getFilterDistance(),
Config.HOME_NEWS_COUNT,
Config.HOME_FEATURED_COUNT,
Config.DEFAULT_STORE_COUNT_TO_FIND_DISTANCE);
}
else {
strUrl = String.format("%s?api_key=%s&lat=%f&lon=%f&radius=%f&news_count=%d&default_store_count_to_find_distance=%d",
Config.GET_HOME_STORES_NEWS_JSON_URL,
Config.API_KEY,
MainActivity.location.getLatitude(),
MainActivity.location.getLongitude(),
accessSession.getFilterDistance(),
Config.HOME_NEWS_COUNT,
Config.DEFAULT_STORE_COUNT_TO_FIND_DISTANCE);
}
DataParser parser = new DataParser();
Data data = parser.getData(strUrl);
MainActivity main = (MainActivity) getActivity();
if (main == null)
return;
Queries q = main.getQueries();
if (data == null)
return;
if(Config.AUTO_ADJUST_DISTANCE) {
if(data.getMax_distance() > 0) {
UserAccessSession.getInstance(getActivity()).setFilterDistanceMax(data.getMax_distance());
}
if(UserAccessSession.getInstance(getActivity()).getFilterDistance() == 0) {
UserAccessSession.getInstance(getActivity()).setFilterDistance(data.getDefault_distance());
}
}
if (data.getStores() != null && data.getStores().size() > 0) {
Log.v("myApp", "ENTERED THE IF - ENTERED THE IF - ENTERED THE IF - ENTERED THE IF - ENTERED THE IF" );
int storeCount = data.getStores().size() < Config.HOME_STORE_FEATURED_COUNT ?
data.getStores().size() : Config.HOME_STORE_FEATURED_COUNT;
int x = 0;
for (Store store : data.getStores()) {
Location locStore = new Location("Store");
locStore.setLatitude(store.getLat());
locStore.setLongitude(store.getLon());
double userDistanceFromStore = MainActivity.location.distanceTo(locStore) / 1000;
store.setDistance(userDistanceFromStore);
if (userDistanceFromStore < 50){
Log.v("myApp", "STORE - STORE - STORE - STORE - STORE - STORE - STORE - STORE - STORE - STORE - STORE- STORE" );
q.deleteStore(store.getStore_id());
q.insertStore(store);
if(x < storeCount) {
Log.v("myApp", "if(x < storeCount) - if(x < storeCount)- if(x < storeCount)- if(x < storeCount)- if(x < storeCount)- if(x < storeCount)" );
if (store.getFeatured() == 3 ) {
storeList.add(store);
x += 1;
}
}
if (store.getPhotos() != null && store.getPhotos().size() > 0) {
Log.v("myApp", "PHOTOS - PHOTOS - PHOTOS - PHOTOS - PHOTOS - PHOTOS - PHOTOS - PHOTOS - PHOTOS - PHOTOS - PHOTOS - PHOTOS - PHOTOS" );
for (Photo photo : store.getPhotos()) {
q.deletePhoto(photo.getPhoto_id());
q.insertPhoto(photo);
}
}
}}
}
if (data.getNews() != null && data.getNews().size() > 0) {
Log.v("myApp", "NEWS - NEWS - NEWS - NEWS - NEWS - NEWS - NEWS - NEWS - NEWS - NEWS - NEWS - NEWS - NEWS - NEWS - NEWS - NEWS - NEWS - NEWS" );
int newsCount = data.getNews().size() < Config.HOME_NEWS_COUNT
? data.getNews().size() : Config.HOME_NEWS_COUNT;
int x = 0;
for (News news : data.getNews()) {
q.deleteNews(news.getNews_id());
q.insertNews(news);
if(x < newsCount) {
newsList.add(news);
x += 1;
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
});
task.execute();
}
@Override
public void onDestroyView() {
super.onDestroyView();
if (viewInflate != null) {
ViewGroup parentViewGroup = (ViewGroup) viewInflate.getParent();
if (parentViewGroup != null) {
MGSlider slider = (MGSlider) viewInflate.findViewById(R.id.slider);
slider.pauseSliderAnimation();
parentViewGroup.removeAllViews();
}
}
handler.removeCallbacks(runnable);
if(task != null)
task.cancel(true);
}
Handler handler = new Handler();
int apple = 0;
Runnable runnable = new Runnable() {
public void run() {
if(apple < 5) {
timer();
}
}
};
public void timer()
{
int randomNum = 1 + rand.nextInt((50 - 1) + 1);
TextView tvTitleHeader = (TextView) viewInflate.findViewById(R.id.tvTitleeee);
if (randomNum == 1 ){
tvTitleHeader.setText(getString(R.string.A1));
}
if (randomNum == 2 ){
tvTitleHeader.setText(getString(R.string.A2));
}
if (randomNum == 3 ){
tvTitleHeader.setText(getString(R.string.A3));
}
if (randomNum == 4 ){
tvTitleHeader.setText(getString(R.string.A4));
}
if (randomNum == 5 ){
tvTitleHeader.setText(getString(R.string.A5));
}
if (randomNum == 6 ){
tvTitleHeader.setText(getString(R.string.A6));
}
if (randomNum == 7 ){
tvTitleHeader.setText(getString(R.string.A7));
}
if (randomNum == 8 ){
tvTitleHeader.setText(getString(R.string.A8));
}
if (randomNum == 9 ){
tvTitleHeader.setText(getString(R.string.A9));
}
if (randomNum == 10 ){
tvTitleHeader.setText(getString(R.string.A10));
}
if (randomNum == 11 ){
tvTitleHeader.setText(getString(R.string.A11));
}
if (randomNum == 12 ){
tvTitleHeader.setText(getString(R.string.A12));
}
if (randomNum == 13 ){
tvTitleHeader.setText(getString(R.string.A13));
}
if (randomNum == 14 ){
tvTitleHeader.setText(getString(R.string.A14));
}
if (randomNum == 15 ){
tvTitleHeader.setText(getString(R.string.A15));
}
if (randomNum == 16 ){
tvTitleHeader.setText(getString(R.string.A16));
}
if (randomNum == 17 ){
tvTitleHeader.setText(getString(R.string.A17));
}
if (randomNum == 18 ){
tvTitleHeader.setText(getString(R.string.A18));
}
if (randomNum == 19 ){
tvTitleHeader.setText(getString(R.string.A19));
}
if (randomNum == 20 ){
tvTitleHeader.setText(getString(R.string.A20));
}
if (randomNum == 21 ){
tvTitleHeader.setText(getString(R.string.A21));
}
if (randomNum == 22 ){
tvTitleHeader.setText(getString(R.string.A22));
}
if (randomNum == 23 ){
tvTitleHeader.setText(getString(R.string.A23));
}
if (randomNum == 24 ){
tvTitleHeader.setText(getString(R.string.A24));
}
if (randomNum == 25 ){
tvTitleHeader.setText(getString(R.string.A25));
}
if (randomNum == 26 ){
tvTitleHeader.setText(getString(R.string.A26));
}
if (randomNum == 27 ){
tvTitleHeader.setText(getString(R.string.A27));
}
if (randomNum == 28 ){
tvTitleHeader.setText(getString(R.string.A28));
}
if (randomNum == 29 ){
tvTitleHeader.setText(getString(R.string.A29));
}
if (randomNum == 30 ){
tvTitleHeader.setText(getString(R.string.A30));
}
if (randomNum == 31 ){
tvTitleHeader.setText(getString(R.string.A31));
}
if (randomNum == 32 ){
tvTitleHeader.setText(getString(R.string.A32));
}
if (randomNum == 33 ){
tvTitleHeader.setText(getString(R.string.A33));
}
if (randomNum == 34 ){
tvTitleHeader.setText(getString(R.string.A34));
}
if (randomNum == 35 ){
tvTitleHeader.setText(getString(R.string.A35));
}
if (randomNum == 36 ){
tvTitleHeader.setText(getString(R.string.A36));
}
if (randomNum == 37 ){
tvTitleHeader.setText(getString(R.string.A37));
}
if (randomNum == 38 ){
tvTitleHeader.setText(getString(R.string.A38));
}
if (randomNum == 39 ){
tvTitleHeader.setText(getString(R.string.A39));
}
if (randomNum == 40 ){
tvTitleHeader.setText(getString(R.string.A40));
}
if (randomNum == 41 ){
tvTitleHeader.setText(getString(R.string.A41));
}
if (randomNum == 42 ){
tvTitleHeader.setText(getString(R.string.A42));
}
if (randomNum == 43 ){
tvTitleHeader.setText(getString(R.string.A43));
}
if (randomNum == 44 ){
tvTitleHeader.setText(getString(R.string.A44));
}
if (randomNum == 45 ){
tvTitleHeader.setText(getString(R.string.A45));
}
if (randomNum == 46 ){
tvTitleHeader.setText(getString(R.string.A46));
}
if (randomNum == 47 ){
tvTitleHeader.setText(getString(R.string.A47));
}
if (randomNum == 48 ){
tvTitleHeader.setText(getString(R.string.A48));
}
if (randomNum == 49 ){
tvTitleHeader.setText(getString(R.string.A49));
}
if (randomNum == 50 ){
tvTitleHeader.setText(getString(R.string.A50));
}
handler.postDelayed(runnable, 15000);
apple++;
}
private void showList() {
ListView listView = (ListView) viewInflate.findViewById(R.id.listView);
listView.setOnItemClickListener(this);
listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
MGListAdapter adapter = new MGListAdapter(
getActivity(), newsList.size(), R.layout.twitter_dialog);
adapter.setOnMGListAdapterAdapterListener(new OnMGListAdapterAdapterListener() {
@Override
public void OnMGListAdapterAdapterCreated(MGListAdapter adapter, View v,
int position, ViewGroup viewGroup) {
// TODO Auto-generated method stub
News news = newsList.get(position);
MGImageView imgViewPhoto = (MGImageView) v.findViewById(R.id.imgViewPhoto);
imgViewPhoto.setCornerRadius(0.0f);
imgViewPhoto.setBorderWidth(UIConfig.BORDER_WIDTH);
imgViewPhoto.setBorderColor(getResources().getColor(UIConfig.THEME_BLACK_COLOR));
if(news.getPhoto_url() != null) {
MainActivity.getImageLoader().displayImage(news.getPhoto_url(), imgViewPhoto, options);
}
else {
MainActivity.getImageLoader().displayImage(null, imgViewPhoto, options);
}
imgViewPhoto.setTag(position);
Spanned name = Html.fromHtml(news.getNews_title());
Spanned address = Html.fromHtml(news.getNews_content());
TextView tvTitle = (TextView) v.findViewById(R.id.tvTitle);
tvTitle.setText(name);
TextView tvSubtitle = (TextView) v.findViewById(R.id.tvSubtitle);
tvSubtitle.setText(address);
String date = DateTimeHelper.getStringDateFromTimeStamp(news.getCreated_at(), "MM/dd/yyyy" );
TextView tvDate = (TextView) v.findViewById(R.id.tvDate);
tvDate.setText(date);
}
});
listView.setAdapter(adapter);
}
@Override
public void onItemClick(AdapterView<?> adapterView, View v, int pos, long resId) {
// TODO Auto-generated method stub
MGSlider slider = (MGSlider) viewInflate.findViewById(R.id.slider);
slider.stopSliderAnimation();
News news = newsList.get(pos);
Intent i = new Intent(getActivity(), NewsDetailActivity.class);
i.putExtra("news", news);
getActivity().startActivity(i);
}
// Create Slider
private void createSlider() {
if(storeList != null && storeList.size() == 0 && newsList != null && newsList.size() == 0) {
MGUtilities.showNotifier(this.getActivity(), MainActivity.offsetY, R.string.failed_data);
return;
}
final MainActivity main = (MainActivity) getActivity();
final Queries q = main.getQueries();
MGSlider slider = (MGSlider) viewInflate.findViewById(R.id.slider);
if (storeList.size() < 1) {
FrameLayout layout = (FrameLayout)viewInflate.findViewById(R.id.framelayout100);
layout.setVisibility(View.GONE);
ImageView layoutt = (ImageView) viewInflate.findViewById(R.id.framelayout1001);
layoutt.setVisibility(View.GONE);
}
slider.setMaxSliderThumb(storeList.size());
MGSliderAdapter adapter = new MGSliderAdapter(
R.layout.slider_entry, storeList.size(), storeList.size());
adapter.setOnMGSliderAdapterListener(new OnMGSliderAdapterListener() {
@Override
public void onOnMGSliderAdapterCreated(MGSliderAdapter adapter, View v,
int position) {
// TODO Auto-generated method stub
final Store entry = storeList.get(position);
Photo p = q.getPhotoByStoreId(entry.getStore_id());
ImageView imageViewSlider = (ImageView) v.findViewById(R.id.imageViewSlider);
if(p != null) {
MainActivity.getImageLoader().displayImage(p.getPhoto_url(), imageViewSlider, options);
}
else {
imageViewSlider.setImageResource(UIConfig.SLIDER_PLACEHOLDER);
}
imageViewSlider.setTag(position);
imageViewSlider.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent i = new Intent(getActivity(), DetailActivity.class);
i.putExtra("store", entry);
getActivity().startActivity(i);
}
});
Spanned name = Html.fromHtml(entry.getStore_name());
Spanned address = Html.fromHtml(entry.getIdade());
Spanned hour = Html.fromHtml(entry.getHora());
TextView tvTitle = (TextView) v.findViewById(R.id.tvTitle);
tvTitle.setText(name);
TextView tvSubtitle = (TextView) v.findViewById(R.id.tvSubtitle);
tvSubtitle.setText(" "+ address);
TextView tvHour = (TextView) v.findViewById(R.id.tvHour);
tvHour.setText(" "+hour);
TextView tvDistance = (TextView) v.findViewById(R.id.tvDistance);
tvDistance.setVisibility(View.INVISIBLE);
if(MGUtilities.isLocationEnabled(getActivity()) && MainActivity.location != null) {
if(entry.getDistance() != -1) {
tvDistance.setVisibility(View.VISIBLE);
double miles = entry.getDistance();
String format = String.format(
"%.2f %s", miles,
MGUtilities.getStringFromResource(getActivity(), R.string.km));
tvDistance.setText(format);
}
else {
tvDistance.setText(R.string.empty_distance);
}
}
}
});
slider.setOnMGSliderListener(new OnMGSliderListener() {
@Override
public void onItemThumbSelected(MGSlider slider, ImageView[] buttonPoint,
ImageView imgView, int pos) { }
@Override
public void onItemThumbCreated(MGSlider slider, ImageView imgView, int pos) { }
@Override
public void onItemPageScrolled(MGSlider slider, ImageView[] buttonPoint, int pos) { }
@Override
public void onItemMGSliderToView(MGSlider slider, int pos) { }
@Override
public void onItemMGSliderViewClick(AdapterView<?> adapterView, View v,
int pos, long resid) { }
@Override
public void onAllItemThumbCreated(MGSlider slider, LinearLayout linearLayout) { }
});
slider.setOffscreenPageLimit(storeList.size() - 1);
slider.setAdapter(adapter);
slider.setActivity(this.getActivity());
slider.setSliderAnimation(3000);
slider.resumeSliderAnimation();
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
MGSlider slider = (MGSlider) viewInflate.findViewById(R.id.slider);
slider.stopSliderAnimation();
switch(v.getId()) { }
}
@Override
public void onResume() {
// TODO Auto-generated method stub
super.onResume();
MGSlider slider = (MGSlider) viewInflate.findViewById(R.id.slider);
slider.resumeSliderAnimation();
}
@Override
public void onPause() {
// TODO Auto-generated method stub
super.onPause();
MGSlider slider = (MGSlider) viewInflate.findViewById(R.id.slider);
slider.pauseSliderAnimation();
}
@Override
public void onLocationChanged(Location prevLoc, Location currentLoc) {
MainActivity main = (MainActivity) getActivity();
main.setOnLocationListener(null);
getData();
}
public static void displayPromptForEnablingGPS(
final Activity activity)
{
final AlertDialog.Builder builder =
new AlertDialog.Builder(activity);
final String action = Settings.ACTION_LOCATION_SOURCE_SETTINGS;
final String message = "Não foi possível localiza-lo."
+ " Por favor habilite seu GPS para encontrar"
+ " as acompanhantes próximas de você.";
builder.setMessage(message)
.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface d, int id) {
activity.startActivity(new Intent(action));
System.exit(0);
d.dismiss();
}
});
builder.create().show();
}
}
您在public static void main(String args[]) {
Q1 q1 = new Q1();
Q2 q2 = new Q2();
try {
// this prints "abc" and no exception is thrown
System.out.println(q2.method(q1));
// this throws a new QE2(), which prints
// this prints "qe2 - 1" followed by "qe2 - 2"
System.out.println(q2.method(q2));
} catch(QE1 e) {
System.out.println("exception 1");
} finally {
// your code ends up here, which prints "finally"
System.out.println("finally");
}
}
方法的QE2块中抛出了try类型的例外情况。但是，您实际上从未捕获过这种类型的异常，因为您只捕获main。因此，您最终会在QE1区块中打印finally。
如果您想捕获所有异常，那么您可以在"finally"阻止之前使用catch (Exception e)。