Java 归档 - Page 63 of 655

Help Java generics: cannot use “object” as parameter “? Extends object“

I have the following code: import java.util.*; public class SellTransaction extends Transaction { private Map<……

Java

2020-09-04

Java – JPA and MySQL transaction isolation level

I have a local query that can be inserted into MySQL database in batches: String sql = "insert into t1 (a,b) select x,……

Java

2020-09-04

Java – regular expression – replaces characters (commas) between double quotes if patterns match

I have this log from the exchange server I use this regular expression to match and group patterns; Basically, the inf……

Java

2020-09-04

My code physicsremoveexample What’s wrong with Java (andengine)?

Try to take an example from here. Physicsremoveexample java. When the program starts, I receive this message: Sorry! T……

Java

2020-09-04

Java reads hexadecimal values into arrays of type int

I have a file that contains integers in hexadecimal I know you can say int i = 0x But when reading I get the wrong val……

Java

2020-09-04

Mapping objects from files in Java

I want to map my objects from a text file. The content of the text file is as follows: ~ attribute1value attribute2val……

Java

2020-09-04

Simple physical simulation in Java does not work properly

I want to achieve ball physics, as a novice, I adjust the code in the tutorial. I try to do my best, but I can't apply……

Java

2020-09-04

Java – how to handle exceptions if a try block is followed at the end

If I ended up using only the catch block, how would I handle exceptions Solution The exception will be passed up the c……

Java

2020-09-04

Use random numbers to list in Java

I received the following error import java.util.*; import java.io.*; public class ShufflingListAndarray { public st……

Java

2020-09-04

Java – how do I persist cookies?

I create a cookie in the JSP script, which is located at: www.myproject.com/login/index.jsp If I restart the browser a……

Java

2020-09-04

Java – is it a good idea to use checked exceptions in external APIs?

It is not uncommon to view checked predictions in the API, and one of the most famous examples is closed IOException. ……

Java

2020-09-04

Java – annotate enummap with hibernate annotations

Just a simple question: I want to use enummap in one of my entity classes Is there a special way to annotate these? Wh……

Java

2020-09-04

Implementing IM platform with Java

If you create an IM platform in Java, will this be a better way to communicate between the client and the server? Plea……

Java

2020-09-04

Java EE – EJB with main () – what is this about?

During the original training of EJB from sun, I came across a rather strange concept of enterprise application client,……

Java

2020-09-04

Computing recursive steps in Java

I want to count the number of recursive steps and stop recursion when a certain limit is reached Actually, I'm dealing……

Java

2020-09-04

Java – izpack replaces variables in text files

I tried to figure out how to replace variables with izpack in text files It seems that it should be a simple thing, bu……

Java

2020-09-04

What is the best way to detect repeated uploads of files in the Java environment?

As part of a Java - based web application, I will accept the uploaded xls& . CSV (and possibly other types) files ……

Java

2020-09-04

Java – ant: jar and zipfileset – copy files from one jar to another

I am currently doing this: <jar update="yes" jarfile="${pwd}/dist/${release}_installer.jar"> <zipfile……

Java

2020-09-04

Help write your own javax swing. text. Document

I am writing a Java textcomponent in which the underlying document has some structure It's very short, basically one l……

Java

2020-09-04

Java – mapping languages to examples

I recently read Eric Steven Raymond's article "how to become a hacker". I like his suggestion to learn five key langua……

Java

2020-09-04

How to use Java program to detect Internet connection

How to write a java program and tell me whether I have Internet access I don't want to Ping or create a connection to ……

Java

2020-09-04

Strange problems of simple multithreaded programs in Java

I just started playing multithreaded programming I want my program to alternate the characters' – 'and', but that's no……

Java

2020-09-04

The Java – JSTL FMT library throws a 500 error. Do you need to enable the session?

I am developing a simple servlet / JSP, data - driven website on Google App Engine I have started using the JSTL FMT l……

Java

2020-09-04

How to synchronize java code

I have the next code: Process p = Runtime.getRuntime().exec(args); I want my program to wait for the runtime getRuntim……

Java

2020-09-04

Java – how to parse XML documents?

I have XML documents in variables (not in files) How to store data in it? I don't have any other files. I put it in my……

Java

2020-09-04

How to output formatted HTML in Java

I'm reading this HTML file: try { BufferedReader bufferReader = new BufferedReader(new FileReader(path)); Stri……

Java

2020-09-04

Java – seam using JSF and seam using GWT

Can anyone compare and contrast these two solutions? I know little about seam or JSF, although I am familiar with the ……

Java

2020-09-04

Java – add custom attributes to JTree nodes

I need to store some data in the JTree node Can I add custom attributes to the node to save my data? Solution You can ……

Java

2020-09-03

Java – cannot map control backspace to keystroke

I can't map the control backspace key to keystroke The following is meaningless to me import java.awt.event.KeyEvent; ……

Java

2020-09-03

Java – save JPanel graphics

I'm not sure how graphics work in Java, so I can't debug my problem This is a quick code that will demonstrate my prob……

Java

2020-09-03

Java – when the direction changes, the activity will continue to restart

How can I prevent the activity from restarting when the screen rotates or the user slides the keyboard on the phone? I……

Java

2020-09-03

Java regular expression – matches all strings except a few

I have these strings in the array. I want to iterate over the array and find matching data (check one row for each mat……

Java

2020-09-03

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Help Java generics: cannot use “object” as parameter “? Extends object“

Java – JPA and MySQL transaction isolation level

Java – regular expression – replaces characters (commas) between double quotes if patterns match

My code physicsremoveexample What’s wrong with Java (andengine)?

Java reads hexadecimal values into arrays of type int

Mapping objects from files in Java

Simple physical simulation in Java does not work properly

Java – how to handle exceptions if a try block is followed at the end

Use random numbers to list in Java

Java – how do I persist cookies?

Java – is it a good idea to use checked exceptions in external APIs?

Java – annotate enummap with hibernate annotations

Implementing IM platform with Java

Java EE – EJB with main () – what is this about?

Computing recursive steps in Java

Java – izpack replaces variables in text files

What is the best way to detect repeated uploads of files in the Java environment?

Java – ant: jar and zipfileset – copy files from one jar to another

Help write your own javax swing. text. Document

Java – mapping languages to examples

How to use Java program to detect Internet connection

Strange problems of simple multithreaded programs in Java

The Java – JSTL FMT library throws a 500 error. Do you need to enable the session?

How to synchronize java code

Java – how to parse XML documents?

How to output formatted HTML in Java

Java – seam using JSF and seam using GWT

Java – add custom attributes to JTree nodes

Java – cannot map control backspace to keystroke

Java – save JPanel graphics

Java – when the direction changes, the activity will continue to restart

Java regular expression – matches all strings except a few

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