java

[Solved] I can’t get the sum of the list [closed]

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Let’s do it in parts Generate random numbers. You are generating from a = 1 to a = 49 random numbers insted of 50. If you know how many times you want to iterate, you may use the for loop. Math.random() returns a double, so you have to cast to int with (int) before it. … Read more

[Solved] Unable to declare variable

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You need to do findViewById inside MessageViewHolder() Using itemView Try this public class MessageViewHolder extends RecyclerView.ViewHolder { public TextView chatText; public CircleImageView chatImage; public MessageViewHolder(View itemView) { super(itemView); chatText =itemView.findViewById(R.id.chatText); chatImage=itemView.findViewById(R.id.chatImage); } } 4 solved Unable to declare variable

[Solved] Does Java ThreadLocalRandom.current().nextGaussian() have a limit?

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nextGaussian() can return any value that can represented by a double data type. Gaussian distribution approaches but never reaches 0 on either side. So it’s theoretically possible to get a value of Double.MAX_VALUE, but very unlikely. Gaussian distribution looks like this: (http://hyperphysics.phy-astr.gsu.edu/hbase/Math/gaufcn.html) The distribution stretches to positive and negative infinity, so there is theoretically no … Read more

[Solved] Accept arbitrary multi-line input of String type and store it in a variable

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From what I gather, you’re trying to get input from a user until that user types -1. If thats the case, please see my function below. public static void main (String[] args) { // Scanner is used for I/O Scanner input = new Scanner(System.in); // Prompt user to enter text System.out.println(“Enter something “); // Get … Read more

[Solved] Insufficient Details [closed]

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It is pretty hard answering your question without knowing how the file you are scanning is formatted. If it is formatted something like this: id name gender age id name2 gender age etc. You could try something like this: id = housenumber.next(); line = housenumber.nextLine(); if(input.equals(id)) { //This should the next line instead of just … Read more

[Solved] Comparing String (index) [duplicate]

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From what I understand, you want to compare two arrays that might not be the same size, and if they are not, then only compare up to the shortest size? You can do something like this: boolean equals = true; for(int i = 0; i < test1.length && i < test2.length; i++) { if(!test1[i].equals(test2[i])) { … Read more

[Solved] Can any one explain me the actual concept of Creating and Initialising an object in java?why a default constructor is used in initialising an object [closed]

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Can any one explain me the actual concept of Creating and Initialising an object in java?why a default constructor is used in initialising an object [closed] solved Can any one explain me the actual concept of Creating and Initialising an object in java?why a default constructor is used in initialising an object [closed]

[Solved] Eclipse autocomplete view became wide and block the whole screen [closed]

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Eclipse could be remembering the size of the dialog for content assist UI in the workspace/.metadata directory. Try editing this file: <workspace_dir>/.metadata/.plugins/org.eclipse.jdt.ui/dialog_settings.xml Look for the section that looks like this: <section name=”completion_proposal_size”> </section> In my workspace there is no special settings here, but perhaps there are some special settings in your workspace. 1 solved Eclipse … Read more

[Solved] Retrieve the data from DB and store each Resultset in a excel sheet [closed]

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i got this from someone else but figured it could be applied to your situation as well. try { Class.forName(“driverName”); //driver name Connection con = DriverManager.getConnection(“url”, “user”, “pass”); Statement st = con.createStatement(); ResultSet rs = st.executeQuery(“Select * from tablename”); //table you want to get information from HSSFWorkbook workbook = new HSSFWorkbook(); HSSFSheet sheet = workbook.createSheet(“sheetName”); … Read more

[Solved] Why does my View.findViewById return null?

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mLanguageLogoImageView = itemView.findViewById(R.id.language_logo); mLanguageNameTextView = itemView.findViewById(R.id.language_name); mLanguageRankTextView = itemView.findViewById(R.id.language_rank); NullPointerException is thrown when an application attempts to use an object reference that has the null value. At first check your all findViewById elements present in respective xml (R.layout.list_item_language) or not. 0 solved Why does my View.findViewById return null?

[Solved] Map and Cardview Activities

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Here is the example of what you are trying to achieve: Libraries required: compile ‘com.github.ksoichiro:android-observablescrollview:1.5.0’ compile ‘com.nineoldandroids:library:2.4.0’ Sample XML code: <?xml version=”1.0″ encoding=”utf-8″?> <RelativeLayout xmlns:android=”http://schemas.android.com/apk/res/android” xmlns:app=”http://schemas.android.com/apk/res-auto” xmlns:tools=”http://schemas.android.com/tools” android:layout_width=”match_parent” android:layout_height=”match_parent” app:layout_behavior=”@string/appbar_scrolling_view_behavior” tools:showIn=”@layout/activity_main”> <com.github.ksoichiro.android.observablescrollview.ObservableScrollView android:id=”@+id/scroll” android:layout_width=”match_parent” android:layout_height=”match_parent” android:fillViewport=”true”> <RelativeLayout android:layout_width=”match_parent” android:layout_height=”wrap_content” android:gravity=”center_horizontal|start”> <!– YOUR MAP FRAGMENT HERE –> <ImageView android:id=”@+id/image” android:layout_width=”match_parent” android:layout_height=”@dimen/parallax_image_height” android:layout_gravity=”top” android:scaleType=”centerCrop” android:src=”https://stackoverflow.com/questions/45178569/@drawable/putin” /> <View … Read more