包含标签：Java 的文章
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Set boolean flag in Java 8 stream
I wonder what is the best practice for setting boolean flag values from Java streams Here is an example I want to do: …… -
Java – how to correctly throw a NullPointerException?
I need to write a method delete (), which accepts an int parameter K and deletes the k-th element in the linked list (…… -
When using java 8 update101, HashMap Entries cannot be cast to collection
After updating to Java 8 update 101, I encountered an exception in the following code It works well with Java 8 update…… -
How to effectively convert java code to Python?
I would be glad if you could tell me how to translate code from Java to python Solution If you want to translate java …… -
Java – insert different arrays in ArrayList
I inserted an array in ArrayList, but after inserting the second array, the first array is the same as the second arra…… -
Why doesn’t my java exchange function work?
See English answer > is java "pass by reference" or "pass by value"? 78 void swap(int a,int b) { int temp = a; …… -
Dynamic – ownership tracking in rust: difference between box (heap) and t (stack)
Trying to use the programming language rust, I found that the compiler can track the movement of some structural field…… -
Splitting strings at specific locations in Java
Suppose you have a string in the form of "word1 word2 Word3 word4" The easiest way to split it is split [0] = "word1 w…… -
Java – JFrame with multiple layers
I have a window with two layers: a static background and a foreground containing moving objects My idea is to draw the…… -
Java – do you want to keep interconnected strings when serializing?
If I have a large object graph with many duplicate strings, is it good to actually () the strings before serializing t…… -
Java – how to customize exception handling behavior in JUnit 3?
I want to use JUnit 3 to implement exception checking (as in JUnit 4) For example, I would like to be able to write th…… -
Java libraries with more data structures
Anyone can point to some excellent Java libraries (jars), which have more data structures than part of the standard Ja…… -
Java – apt and AOP use Maven in the same project
I have to use annotation processing (APT) and AspectJ in the same Maven project Both are suitable for me, but I need t…… -
Java – a simple way to remove headers from XML files
I need to remove non - XML tags from a file generated by another program The document reads as follows: Executing Comm…… -
Java – warning: [rawtypes] found original type: defaultlistmodel
I got this warning from the compiler, which makes no sense (at least to me) It basically requires me to assign type to…… -
How to convert list to HashMap
How can I convert this: Map<String,Integer> itemsBought So I can add it to the ArrayList as follows: public void…… -
java – println(String s)vs println(Object o)
In my opinion, printstream Print (object x) and printstream Println (object x) and printstream Print (string x) and pr…… -
Java policy error applet alert
[aspectj:compile {execution: default}] [aspectj:compile {execution: default}] Current policy properties: mmc.s…… -
Java – bouncycastle installs the provider programmatically
Can the bouncycastle provider be installed programmatically without modifying the security policy file? Solution of co…… -
From Java runtime Exec read stream
I have the following code snippets: Process proc = runtime.exec(command); errorGobbler = new ErrorStreamGobbler(proc.g…… -
Java – why does us-ascii encoding accept non us-ascii characters?
Consider the following codes: public class ReadingTest { public void readAndPrint(String usingEncoding) throws Ex…… -
Java – Hide password content in source code
Who knows how to hide the password content in the source code of j2me program? That is, people cannot regard "DBT" as …… -
Java: object oriented design; LinkedList and stack
I am writing BFS and DFS in Java What I want to do is create a class like this: /** Preforms BFS and DFS on ... */ pub…… -
Java socket non blocking read
I am using datainputstream to read characters / data from the socket I want to use it readUnsignedShort(); If there ar…… -
Why doesn’t it work for Java to return a statement within a catch block?
Why does the following code always return true even if an exception is thrown? public boolean write (ArrayList<Stri…… -
Concurrency – “go is a concurrent Lang” what does that mean?
Go is a concurrent lang. what does that mean? Does this mean that it is a C / C + + / Java succedaneum? Solution A con…… -
Append text in Java’s jtextarea
There is something wrong with my text area I use jtextarea1 Append ("smart and interesting"); Add text First attachmen…… -
The wrong time zone is used in the Java Web service
I have a Jax - B Java Web service that I use to update the database Each row in the table I am updating is represented…… -
Java – delete the final file during catch vs. delete the temporary file during output file
This is in Java 6 I've seen people create temporary files, do something, and then rename them to output files more tha…… -
java – Bold titledBorder
I tried UIManager.getDefaults().put("TitledBorder.font",Font.BOLD); contentPanel.setBorder(new TitledBorder("Client Do…… -
Create hasmaps recursively in Java
I'm trying to create a new HashMap for each document I enter In pseudocode, I can think of something similar: For(each…… -
Quicksort (Java) causes stack Verflow is in array length> 60k
My code works normally (as far as I know) until my input array size (a.length) is about 62000, at which time I get sta……