java,arrays,if-statement , Is it possible to write return statement in if block using java?
Is it possible to write return statement in if block using java?
Question:
Tag: java,arrays,if-statement
I want to return Vector according to if block but the code gives me the following error: Add return statement.
Is it possible to write return statement in if block?
public static int[] zeroVectorBinning1( ImageFloat32 angle,ImageFloat32 Magnitude )
{
for (int NumberOFChanks=0;NumberOFChanks<locations_original.size();NumberOFChanks++)
{
for(int i=0;i<angle.getHeight();i++)
for(int j=0;j<angle.getWidth();j++)
{
int orientaionVal=(int) angle.get(j, i);
if(orientaionVal<=0)
{int magnitudeVal=(int) Magnitude.get(j, i);
int[] Vector = new int[19];
Vector=zeroVector(19);
Vector[0]=magnitudeVal;
return Vector;
}
else if(orientaionVal<=20)
{int magnitudeVal=(int) Magnitude.get(j, i);
int[] Vector = new int[19];
Vector=zeroVector(19);
Vector[1]=magnitudeVal;
return Vector;
}
else(orientaionVal >= 0 && orientaionVal <=20)
{
int magnitudeVal=(int) Magnitude.get(j, i);
int[] Vector = new int[19];
Vector=zeroVector(19);
Vector[0]=magnitudeVal;
Vector[1]=magnitudeVal;
return Vector;
}
}
}
}
Answer:
There's nothing wrong in having return statements in if blocks, but your method must have a return statement in any execution path.
Your for loops may never be executed (if, for example, locations_original.size() is 0), in which case none of the if blocks that contain the return statements will be reached. Therefore you must add a return statement following the loops.
Related:
arrays,ruby,csv
I have a multidimensional array like this one : myArray = [["Alaska","Rain","3"],["Alaska","Snow","4"],["Alabama","Snow","2"],["Alabama","Hail","1"]] I would like to end up with CSV output like this. State,Snow,Rain,Hail Alaska,4,3,nil Alabama,2,nil,1 I know that to get this outputted to CSV the way I want it I have to have output array like this: outputArray =[["State","Snow","Rain","Hail"],["Alaska",4,3,nil],["Alabama",2,nil,1]]...
java,android,eclipse,adt
This question already has an answer here: What is a Null Pointer Exception, and how do I fix it? 12 answers I'm a beginner in android developing and I'm trying to build a simple app but I'm getting this error in the emulator.(Unfortunately,(App) has unexpectedly stopped). LogCat http://i.stack.imgur.com/VZhuL.png package...
java,eclipse
I have a case of a mysterious missing curly brace that I don't see any use for. Eclipse says, "Syntax error on token ";", { expected after this token". Either I am missing something very silly or there is something new I have to learn about Java. This is the...
java,android,listview,android-fragments,expandablelistview
In my list view I have an textview in expandable group and I want to open the dialog when textview is clicked to fill the information through edittext and update textview. Problem: how could I get the groupview textview item in my fragment oncreateview() method....
java,types,javadoc
When Javadoc'ing, I don't know whether you should explicitly say whether the parameters are of type String or int. For example /** * This method does something * @param foo an object of type Foo * @param abc the number of doors, of type int * @return the number of...
java,spring,logging,lightadmin
I have a Java web application which use Spring and Hibernate and I plan to use lightadmin to provide an administration interface. However, I found very little information about the logging part of lightadmin : if I have such an adminsitration interface, I would like that any operation made to...
java,apache-spark,apache-spark-sql
I am trying to use Apache Spark for comparing two different files based on some common field, and get the values from both files and write it as output file. I am using Spark SQL for joining both files (after storing the RDD as table). Is this the correct approach?...
ruby-on-rails,arrays,ruby,multidimensional-array
seating_arrangement [ [:first, :second, :none], [:first, :none, :second], [:second, :second, :first], ] I need to copy this array into new array. I tried to do it by following code: class Simulator @@current_state def initialize(seating_arrangement) @@current_state = seating_arrangement.dup end But whenever I am making any changes to seating_arrangement current_state changes automatically....
javascript,arrays
Here's what is asked: validItems(items) – this function receives a string array of items which are to be for a customer. The function returns an empty string indicating all item codes in the array are valid; otherwise the function returns the first invalid item code in the array. All item...
java,spring,jsp,spring-mvc
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> <!-- avoid '???' --> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp"/> </bean> if i create other subfolders under jsp , for instance /WEB-INF/jsp/reports , /WEB-INF/jsp/insertions how should i configure now the viewResolver to can resolve these new sub folders??...
java,logging,stdout
In Java, how to block code from writing to system out? My app calls a 3rd party library that spams logs by issuing numerous System.out.println() calls. I don't have legal rights to decompile and patch the library. I'm running Websphere 8.5.x Considered using System.setOut(PrintStream out), but that will effect the...
java,actionscript-3,flex
I am using Flerry as Java-Flex bridge for my Flex Desktop Application. How to convert List in Java to ArrayCollection in Flex Flex Code:- [Bindable]public var screenList:ArrayCollection; <flerry:NativeObject id="windowControllerObj" source="ls.window.EnumAllWindowNames" singleton="true" fault="windowControllerObj_faultHandler(event)"> <flerry:NativeMethod id="getWindowNames" name="getAllWindowNames" result="windowControllerObj_resultHandler(event)" fault="getWindowNames_faultHandler(event)"/>...
java,elasticsearch,elasticsearch-plugin
As I know we can parse document in elastic search, And when we search for a keyword, It will return the document using this code of java API:- org.elasticsearch.action.search.SearchResponse searchHits = node.client() .prepareSearch() .setIndices("indices") .setQuery(qb) .setFrom(0).setSize(1000) .addHighlightedField("file.filename") .addHighlightedField("content") .addHighlightedField("meta.title") .setHighlighterPreTags("<span class='badge badge-info'>") .setHighlighterPostTags("</span>") .addFields("*", "_source")...
java,android,android-fragments,spannablestring
I need to do something like this. Suppose I have 2 fragments A and B.There is a text which can be clickable in fragment A and when user click this text , he can go to fragment B. This example helped me to do it but I think it does...
c++,arrays,string
I was trying to achieve translating a character array into a integer string and corresponding character to their alphabetical order. For instance: A(a) = 0 , Z(z) = 25. string key_char = argv[1]; string key_num; for (int i = 0; i < key_char.length(); i++){ if (isalpha(key_char[i])){ if (islower(key_char[i])){ key_num[i] =...
java,regex
I have a string where I have the user should be able to specify xpaths that will be evaluated at runtime. I was thinking about having a the following way to specify it. String = "Hi my name is (/message/user) how can i help you with (/message/message) "; How can...
javascript,arrays,angularjs,foreach
I'm retrieving values from an external source and apply a foreach loop to the results, with the code below. angular.forEach(data, function(value, key) { if (value.start_date > firstdayOfWeek && value.start_date < lastdayOfWeek) { console.log(value.firstname + ' - ' + value.distance); } else { //do nothing } }); The result is console...
javascript,arrays,substring
I have a file that is structure like this : var file = "a|b|c|d, a|b|c|d, a|b|c|d, a|b|c|d, a|b|c|d"; Now I would extract all letters "c" and "d" of this file and put those letter in array, structure like this: var array = [ [a,b,1], [a,b,2], [a,b,3], [a,b,4], [a,b,5] ]; How...
java,while-loop,java.util.scanner
I've looked at similar questions and tried to follow the answers that solved the issues that others have had but putting the sc.next() or sc.nextLine() after the while loop causes it to go into an infinite loop. The problem is if a user enters incorrect input (nothing or a number)...
java,android,android-intent,uri,avd
In my Android app, I have a button that when clicked, launches the external application of my choice to play a video (I gather that this is called an "implicit intent"). Here is the relevant Java code from my onCreate method. Button button = (Button) findViewById(R.id.button); button.setOnClickListener ( new Button.OnClickListener()...
java,network-programming
I know in java we can do NetworkInterface.getNetworkInterfaces() to get all available network interfaces on local machine. Can we do similar thing where I can pass host name to get the NICs(with IPs) which are up and running?
android,arrays,gridview
I'm trying to create a GridView with an array of strings. These are XML, and MainActivity and Adapter, but what I get is a blank screen. I'm change the background, but the result is the same, but clicking on a point on the screen appears to me the toast stating...
javascript,arrays,sorting
I have an array of objects which holds a list of jobs and I would like to sort them in reverse chronological order as they would appear on a resume for example. I came up with the below solution which 'seems' to work but I was wondering if there is...
php,arrays
I'm just a beginner in PHP coding. I've been reading through a tutorial, but having some trouble with basic PHP concepts. If you could help me, I'd be much obliged. I'm having trouble understanding why the following code doesn't work. <?php function sum($x, $y) { $z = $x + $y;...
java,android,gps,geolocation,location
Requirement: 1.Sometimes(not everytime) I am getting latitude and longitude 0.0. 2.I want to know how to get the location update after user has enabled the gps from the settings. Here is my code public class GPSTracker extends Service implements LocationListener { private final Context mContext; // flag for GPS status...
java,spring,hibernate
as we know the struts interceptor execute and wait will take care of long running process by not getting the request to timeout and destroy it sends wait and at last the desired response i want to implement the same for long running process in spring and hibernate. Thanks....
javascript,arrays
I have two arrays, one of data and one of indices: var data = [ 'h', 'e', 'l', 'l', 'o', ' ' ]; var indices = [ 4, 0, 5, 0, 1, 2, 2 ]; I would like to create a third array, using cells of data in order indicated...
java,r,rjava
How to call java method which returns list from R Language.
java,mysql,hibernate,java-ee,struts2
I have a view in MySQL database CREATE VIEW CustInfo AS SELECT a.custName, a.custMobile, b.profession, b.companyName, b.annualIncome FROM customer a INNER JOIN cust_proffessional_info b ON a.cust_id=b.cust_id Is there any way that i can call this view using Struts2 or in Hibernate. I have tried to search it but could not...
java,libgdx
I am currently using pixels as units for placing objects within my world, however this can get tedious because I only ever place objects every 16 pixels. For example, I would like to be able to place an object at position 2 and have the object rendered at the pixel...
java,android
is there any way to get the distinct values of a custom arraylist? public class mystatistic extends BaseActivity { public String objectid; public String playerid; public String playername; public String enemyid; public String enemyname; public String question; public mystatistik(String objectid, String playerid, String playername, String enemyid, String enemyname, String question)...
java,if-statement
I've written a simple Java program to display the results of 20 dice rolls on the console. The results I'm getting are listed below: 3 1 [email protected] 1 5 4 1 [email protected] 1 [email protected] [email protected] 1 6 [email protected] 1 [email protected] [email protected] 1 2 3 3 When I ran it for...
java,android,string
I have a if-statement in the start of my app if (ready.equals("yes")){ ... } and later on my code I have ready="yes"; but the if statement is never called, why? The ready="yes"; is called from a background thread, is that why? public void DownloadFromUrl(final String fileName) { //this is the...
java,selenium,browser
I'm trying to test that when I close my window a popup shows with a warning message. I've tried both driver.close() and driver.quit() after making sure I'm on the proper window but this just terminates the process since my popup doesn't show. I could test it by using the awt...
java,android,eclipse,sdk,versions
I am new to android developments. I am setting up my android development environment using Eclipse. I have a test smart phone with Android version 4.2.2. The automatic installation installed the latest Android SDK version, which is 5.1.1. My questions are: 1. Do I have to install the SDK version...
java,soap,saaj
I need to consume a SOAP Server named "Mouser" for my company. However I have a problem when I try to send a message. The documentation of my request is : POST /service/searchapi.asmx HTTP/1.1 Host: www.mouser.fr Content-Type: application/soap+xml; charset=utf-8 Content-Length: length <?xml version="1.0" encoding="utf-8"?> <soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://www.w3.org/2003/05/soap-envelope"> <soap12:Header> <MouserHeader...
java,class,hex
I understand the structure of a java .class file, but when I want to interpret the raw hex data I get a bit lost. This is a hex dump of a class file, excluding the header and constant pool. I understand the header to be the magic number, minor_version and...
java,jdbc
I am trying to get the stop_name of the last inserted row in the table with preparedStatement. How can I get the last inserted one? I appreciate any help. behavoiur table: CREATE TABLE IF NOT EXISTS behaviour( behaviour_id INT(11) NOT NULL AUTO_INCREMENT PRIMARY KEY, mac VARCHAR(30) NOT NULL, stop_name VARCHAR(30)...
java,android,libgdx
Previously I used getBound method for BitmapFont class in libgdx, but now, I am unable to use it. I cannot find the changes in latest version. Any help is appreciated. Thank you...
java,jsp,spring-mvc,liferay,portlet
I'm trying to achieve a Liferay portlet of submit form using spring MVC. The model: package com.model; public class Person { String firstName; String middleName; public String getFirstName() { return this.firstName; } public String getMiddleName() { return this.middleName; } public void setFirstName(String firstName) { this.firstName=firstName; } public void setMiddleName(String middleName)...
java,android,web-services
I'm trying to rewrite the application in this, in Android Studio link, which is written in Eclipse. There are two problems, first problem is there is this line in the project : import com.example.webserviceactivity.R; I couldn't write this one on Android Studio. The second problem is, in this part of...
java,list,collections,listiterator
As per Java API- IllegalStateException - if neither next nor previous have been called, or remove or add have been called after the last call to next or previous remove()- Removes from the list the last element that was returned by next() or previous() (optional operation). This call can only...
java,rounding
Suppose I want to round numbers that have mantissa greater than 0.3 'up' and those below 'down'. How can I do it in Java? The only thing that came to my mind was Math.round(), but I can't seem to make it follow a certain rule....
c,arrays,loops,malloc,fread
I'm trying to allocate an array 64 bytes in size and then loop over the array indexes to put a read a byte each from the inputfile. but when I don't malloc() the array indexes, the loop stays in index0 (so each time it loops it replaces the content in...
javascript,jquery,html,arrays,contains
I want to search all the elements containing any string in the array. For example I have following list of items <ul> <li>cricket bat</li> <li>tennis ball</li> <li>golf ball</li> <li>hockey stick</li> </ul> and this array var arr = ['bat', 'ball']; It should select all the elements having text bat and ball....
java
I am have a project that need to modify some text in the text file. Like BB,BO,BR,BZ,CL,VE-BR I need make it become BB,BO,BZ,CL,VE. and HU, LT, LV, UA, PT-PT/AR become HU, LT, LV, UA,/AR. I have tried to type some code, however the code fail to loop and also,in this...
java,jsp
Am getting this error in my application javax.el.PropertyNotFoundException: Property 'survey_id' not found on type com.moh.forms.MOH731 javax.el.BeanELResolver$BeanProperties.get(BeanELResolver.java:229) javax.el.BeanELResolver$BeanProperties.access$400(BeanELResolver.java:206) javax.el.BeanELResolver.property(BeanELResolver.java:317) javax.el.BeanELResolver.getValue(BeanELResolver.java:85) This is my MOH731.java @Id @GeneratedValue(strategy = GenerationType.AUTO) private int survey_id; public MOH731 (int survey_id, String uname)...
java,android,list,indexof
I have a list and I want to get the position of the string which starts with specific letter. I am trying this code, but it isn't working. List<String> sp = Arrays.asList(splited); int i2 = sp.indexOf("^w.*$"); ...
c++,arrays,pointers
I've been having bad luck with dynamic pointers when I want to close it. why the application wrote to memory after end of heap buffer? how can I close my array? int main() { . . int **W; W = new int* [n]; for (int i=1; i <= n; i++)...
java,caching,download
Okay, I've been trying to figure this out for a few hours and it's starting to kill me. I wrote a primitive version checker for an app I work on every once and awhile. It's just a simple for fun project. The version checker has been a pain though. It...