Java
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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 …… -
java. Lang. runtimeException: facescontext not found (JSF 1.2 primefaces Tomcat 6)
See English answer > java Lang. runtimeException cannot find facescontext 1 SEVERE: Servlet.service() for servlet j…… -
Java – using runtime getRuntime(). Exec run Excel
try { try { Runtime.getRuntime().exec("excel C:\\file.xls"); } catch (IOException ex) { System.out.println(ex)…… -
How to translate strings using Java?
I want a translation routine that allows me to effectively translate any character into any other character or charact…… -
Java – detects when the user has finished resizing the SWT shell
I have a resizable SWT shell Every time I resize, I have to do something computationally intensive I can register a co…… -
Java – why do the StringBuffer and StringBuilder append methods discard the value returned by the super call
This is a question of curiosity public StringBuilder append(String str) { super.append(str); return this; } Ab…… -
Java scheduled tasks (in Windows)
I have a problem. I want to schedule a specific Java application to run every x days, or every X minutes I really want…… -
MVC pattern in Java swing?
Please give an example of the MVC pattern used in the Java Swing package? Solution Basically, the swing component itse…… -
Java – what are the disadvantages of writing! string. isEmpty()？
In if statements in Java code, I often read if (string! = null & & string. Isempty() = = false) and so on I am…… -
Build a simple GUI using the swing Library in Java 1.6
I'm trying to build a simple GUI using the swing library I don't understand why my table is deleting everything previo…… -
Vcdiff or alternate binary difference format for Java
Is there an open source Java implementation of vcdiff binary differential format (decoder and encoder)? There are xdel…… -
Java – how to perform a series of sorting operations (multiple sorting conditions) on ArrayList
I have an ArrayList of objects on which I want to run a series of sorting operations I want to sort them by name first…… -
Java – a system that players drop (basically gravity)
I'm making a game like Doodle Jump to make your players as high as possible Now I let my player work and move But the …… -
Java – a faster way to batch save using Hibernate?
I have a program that reads text files line by line, creates a hibernate entity object from each line, and saves them …… -
Executing UNIX system commands from Java problems
I encountered a strange problem when executing system commands from Java code Runtime. getRuntime(). exec(“system_prof…… -
Java – questions about polymorphism and overloading
I try to understand the concepts of polymorphism and overloading I have the following code as an experiment However, I…… -
Java – third party object whose design pattern is “toString”
I have a third-party object that uses from Java ToString method inherited from lang.Object This method is useless But ……