The length of the array should change when you remove elements. The arrayLen variable stores the length of the array, but doesn’t change when the array’s length shrinks. To change it, you should be able to just replace arrayLen with arrayList.size(), which will change when your remove elements 0 solved Arraylist java.lang.IndexOutOfBoundsException: Index 3 out … Read more
printElements takes a single parameter of type ArrayList<String>, but you’re trying to give it two arguments of type ArrayList. 3 solved Using “args” but method still not taking more than one array as parameter? [closed]
Is it this you want? final Private myPrivate = PR.HentLogindOplysninger(KundeId); 0 solved How do i get the variable in a arraylist an set them to an label
Answer explained in comments import java.io.File; import java.io.IOException; import java.util.ArrayList; import java.util.Arrays; import java.util.HashMap; import java.util.HashSet; import java.util.List; import java.util.Map; import java.util.Set; import org.apache.commons.io.FileUtils; public class Practice { public static void main (String[] args) { // ArrayList<String> array = new ArrayList<String>(); // ArrayList<String> dup = new ArrayList<String>(); File file = new File (“christmas_carol.txt”); try { … Read more
The List<Pack> in your HashMaps are never defined. They are of the interface list but nowhere you identify what kind of List they are. You have to follow a structure as follows: Map<long, List<Pack>> map = new HashMap<>() // java 7 syntax List<Pack> packets = new ArrayList<>(); packets.add(pack); map.put(msg.getAck(), packets); When adding an element to … Read more
The only way the problem can exist given the posted code, if the reported exception/line is correct, is when “Somerecords” is not really creating a List<Object[]> object – but a List containing non-Object[] elements. One reason could be the method in question is typed to return a non-generic List, filled with double values. Java will … Read more
Find the intersection Find the union Subtract the intersection from the union Code: public static void main(String[] args) { Set<Integer> set1 = new HashSet<Integer>(Arrays.asList(1, 2, 3, 4, 5)); Set<Integer> set2 = new HashSet<Integer>(Arrays.asList(1, 3, 6, 7)); Set<Integer> intersection = new HashSet<Integer>(set1); intersection.retainAll(set2); // set1 is now the union of set1 and set2 set1.addAll(set2); // set1 … Read more
All your Parent instances have the same list of children, since you construct a single ArrayList and use it as the children of all three Person. So you have a recursive data structure. Create a different list for each person. solved java.lang.StackOverflowError when trying to add the same instance of list multiple times
First of all, and that’s supposed to solve the problem. If you use an ArrayList you should check its documentation. When you supposed to go through a simple array you use “nameOfArray.length”, right? Well, the ArrayList has the method “.size()” which bascialy has the same use. So your loop would be better this way : … Read more
First, Java is not Python (although Jython implements Python in Java). Second, you should read the JavaDoc on ArrayList – that is it throws an Exception, IndexOutOfBoundsException – if the index is out of range (index < 0 || index >= size()) Finally, you can do this myList.get(myList.size() – 1); to get this last element … Read more
I suppose you have an ArrayList of ArrayLists, then you can do this to retrieve number of “columns”: list.get(0).size() It means get the first ArrayList from list and get it’s size. solved Number of column in a two dimensional ArrayList
boolean isNegative=false; for(int i=0;i<array.length;i++) { if(array[i]<0) { isNegative=true; break; } } if(isNegative) { // code for displaying negative axis } else { //only display positive axis } solved How to check the positive and negative number’s in a given arraylist in android or java? [closed]
Add DisplayType = cmdType.SelectedIndex to the AddEntry Tried using a String Builder? StringBuilder sb = new StringBuilder(mainWindow.ChangeTextBox); foreach (AddEntry list in addedEntry) { sb.AppendLine(list.Type); if (list.DisplayType == 1) sb.AppendLine(“URL: ” + list.URL); if (list.DisplayType == 0 || list.DisplayType == 1) { sb.AppendLine(“User Name: ” + list.UserName); sb.AppendLine(“Password: ” + list.Password); } if (list.DisplayType == 2) … Read more
Create Constructor in adapter class : public DataAdapter(List<Pojo> dataList, OnItemClickListener listener) { this.dataList = dataList; this.listener = listener; } Create OnBindViewHolder() method and get position : @Override public void onBindViewHolder(MyViewHolder holder, int position) { final Pojo movie = dataList.get(position); holder.Showid.setText(movie.getCatagory_id()); holder.fname.setText(movie.getCatagory_name()); holder.thumbNail.setImageUrl(movie.getCatagory_thumbnailUrl(), imageLoader); holder.itemView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { listener.onItemClick(movie.getSubCatagoryArrayList()); } }); … Read more
This should be working. List<Counter> toRemove = new ArrayList<Counter>(); Collections.sort(interval, (first, second) -> { int c = 0; if (first.compareWith(second)) { if (first.getCount() <= second.getCount()()) toRemove.add(first); else if (first.getCount() >= second.getCount()) toRemove.add(second); } else c = first.getCount().compareTo(second.getCount()); return c; } ); interval.removeAll(toRemove); This is the compareWith function in the Counter class. public boolean compareWith(Counter second) … Read more