Java
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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…… -
Is it necessary to explicitly disconnect from the database when using Java?
After completing the job in Java, you must disconnect from the database? If the connection is not disconnected, will i…… -
Java – sort F: selectitems list based on tags
I have a list of selectitem values and tags The data is obtained from the database. The selectitem list has the follow…… -
Java: expect ArrayList
I have a class called storage Stores an ArrayList. List that contains a special object named products Each product con…… -
Java – store the int value of the bitmask – extract the bit of 1 value
I'm calculating the int equivalent for the location set and storing it in memory From there, I want to determine all 1…… -
Sorting tuple counts in Java
I'm building a class with string to integer mapping So if I have three apples, I will map apples to three I need to wr…… -
Java – multiple swing event dispatch threads
I want to create a new event dispatch thread in swing, but I can't find any references online about how to do this I c…… -
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…… -
Java – how to get to the middle of a singular linked list in an iteration?
Recently, I was asked a question, how do we get to the middle of the list in an iteration in a separate linked list A ……