包含标签：Java 的文章
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Java – how to use the “dynamic optimization import” option to prevent Android studio from deleting wildcard imports
If you use editor > How do I prevent Android studio from using wildcards to delete imports? General > auto impor…… -
Java – Tomcat 7 and spring start the war
When I deployed the war to Tomcat 7, I received the following message: nested exception is java.lang.NoClassDefFoundEr…… -
Java – Dropbox V2 uploadbuilder: “string ‘path’ does not match pattern”
I'm trying to use Drop@R_817_2419 @The V2 API uploads my application data files (SQLite and preferences) from my Andro…… -
Java – accepts only a few characters of EditText
I need to implement EditText on Android, which only accepts a specific range of characters, namely: "s, a, Q, W, R, B,…… -
Java – how to sort an array composed of “null” and a string?
I have an array of 20: private Karte[] deckArr; deckArr = new Karte[20]; Now I want to sort the array by name every ti…… -
Java – Google Analytics – networkonmainthreadexception sent in asynctask
I have to implement Google Analytics in the application I'm working on I'm using Android studio I'm not sure if I shou…… -
Java, item store discount math error
This program is designed to act as a store where numbers are entered for the corresponding items and quantities The pr…… -
Convert foreach to a Java 8 filter stream
I have the following code Map<String,List<String>> map= new HashMap<>(); map.put("a",Arrays.asList("…… -
A strongly referenced class in Java, used for anonymous classes
I want to use hard reference classes in my java code, but, of course, none Is there any other way to do what I want, o…… -
Java – how to parse and interpret ant’s build xml
Is there any for reading and ant build XML and retrieve the ant API of the element from it? Specifically, I want to be…… -
Entity-framework-4 – ef4 codefirst ctp5 nvarchar (max) via attribute
Is there a way to create a custom attribute so that EF codefirst uses nvarchar (max) as the data type when assigning a…… -
Java – constructor for masquerading unit tests
I have a set of classes with dependencies when instantiating, that is, when creating an object of type A, it also crea…… -
Java – move graphic path object
Especially in Java and Android, how to convert the path object to 100 pixels? As in C #, I will use the following code…… -
How to annotate fields with @ ID in EJB 3 (JPA) and Hibernate?
The title is self explanatory I'm glad to hear about the solution, thank you Solution So far, the method used is short…… -
How to use java to get the index size in Solr
I need to use java to get the total size of the index in Apache Solr The following code gets the total number of docum…… -
Why does Java require that the first line constructor should call the parent constructor? If we bypass this requirement, are there any traps?
I have the next code: class Foo { public Foo (String param) { ... } } class Bar extends Foo { public Bar () {…… -
Java: regular expression replacement
I have this string: foo bar 567 baz Now I want to add string num:. Before each number So the result must be: foo bar n…… -
Java: how to programmatically determine that a dataset does not follow a normal distribution?
In a java program, how to determine whether the data set I own follows a normal distribution? Is it possible? Is there…… -
Output a block to the console in Java
Hi, I'm doing my course. My task is to use "*" to make a 5 × 5, but you must use "." Fill in like this: ***** *...* *.…… -
An effective way to shuffle JSON arrays in Java?
Is this the best way? Now, I convert my jsonarray to an ArrayList of a custom class, using collections Shuffle () to p…… -
Java main – call another method
I have the following code: public static void main(String args[]) { start(); } I received this error: non static metho…… -
Best practices for handling multiple exceptions in a similar manner in Java
Is there a standardized best practice for the following situations? I have a code block that can generate many differe…… -
Java – classloader loads the wrong file
I use this snippet to get the file as the input stream File version Txt is packaged in the jar of my application, whic…… -
What are the benefits of Java – executors?
In a life without Java executors, a new thread must be created for each runnable task Creating new threads requires th…… -
Java – jcombobox in JTable cell
I have a JTable created using a model, which is based on an object matrix for(int i=0; i < n ; i++) { ..... …… -
Java – clone and subtract sets – is this useful?
private HashMap<DataObject,HashSet> AllDataObjects; private HashMap<DataObject,HashSet> AllDataObjects; .…… -
Downloading CSV files programmatically using java
Scenario: the website I use to study stock data has a link on the page to export the data to a spreadsheet The format …… -
How to set a specific location in a string in Java?
I have a string called str str = "hi john"; Now I want to set J char to g. how can I do this? Solution You cannot modi…… -
java – ThreadLocal; Is it the same every time you create a copy of a variable?
I'm still confused about the concept of ThreadLocal I've read Javadoc and other related issues, but the terminology us…… -
Why do we need to rewrite equals and hashcode in Java, and why can’t we use the object class to implement them
Guys, please let me know why we need to override equals and hashcode in the real world, and we can't use equals and ha…… -
Java – how to get the file system path of the context root of any application
I'm working on Web applications I'm in my JSP request Called on getcontextpath (), but strangely, I got the address / …… -
. Net – is there a textwriter subclass that triggers an event when writing text?
I wrote a method that accepts textwriter as a parameter (usually console. Out, but not necessarily) When I call this m……