小编max*_*mus的帖子

我正在编写一个简单的客户端,但我总是得到一个NullPointerException:

            while ((input = in.readLine()) != null) {

这是我的代码:

public class ClientTest {

public static String server = "127.0.0.1";
public static int sport = 11111;
public static int cport = 11111;
private static String clientname="";
public static ExecutorService pool = Executors.newCachedThreadPool();
public static BufferedReader in = null;
public static PrintWriter out = null;
public static Socket socket = null;

public ClientTest(){
    this.clientname="";
}


public static void main(String[] args) {

    try {
        socket = new Socket(server, sport);
        out = …

我尝试了经典的方式,pip install Pinax然后安装要求base.txt,但这不起作用？

安装工作pinax(0.9)基础项目包含要求的其他选项有哪些？

更新:

这是以"正确"的方式安装它的例外......

Created project mysite
Installing project requirements...
Traceback (most recent call last):
  File "C:\Users\Desktop\Django\lol\mysite-env\Scripts\pinax-admin-script
.py", line 8, in <module>
    load_entry_point('Pinax==0.9a2', 'console_scripts', 'pinax-admin')()
  File "C:\Users\Desktop\Django\lol\mysite-env\lib\site-packages\pinax\co
re\management\__init__.py", line 105, in execute_from_command_line
    runner.execute()
  File "C:\Users\Desktop\Django\lol\mysite-env\lib\site-packages\pinax\co
re\management\__init__.py", line 94, in execute
    self.loader.load(command).run_from_argv(argv)
  File "C:\Users\Desktop\Django\lol\mysite-env\lib\site-packages\pinax\co
re\management\base.py", line 45, in run_from_argv
    self.handle(*args, **options.__dict__)
  File "C:\Users\Desktop\Django\lol\mysite-env\lib\site-packages\pinax\co
re\management\commands\setup_project.py", line 66, in handle
    self.setup_project(args[0], options["base"], options)
  File "C:\Users\Desktop\Django\lol\mysite-env\lib\site-packages\pinax\co
re\management\commands\setup_project.py", line 134, in setup_project
    installer.install_reqs(not options["allow_no_virtualenv"])
  File "C:\Users\Desktop\Django\lol\mysite-env\lib\site-packages\pinax\co
re\management\commands\setup_project.py", line 207, in install_reqs …

我问一个简单的问题.为什么这两个代码片段不一样？

pNl <- {}

for(i in length(x):length(x)-250) { 
    temp <-x[i] - x[i-1] 
    pNl <-append(pNl, temp, length(pNl))
}

pNl

和

PnL <- {}

for(i in length(x):(length(x)-250)) {
    temp <- x[i] - x[i-1]
    PnL <- append(PnL, temp, length(PnL))
}


PnL

我执行它们时会得到不同的结果......

我非常感谢你的回答!

我想添加动态输入字段.喜欢

PF关于如何添加这样的组件有一个很好的组成部分吗？

请给我一个关于如何开发它的提示,因为我现在还没有任何线索.

我非常感谢你的回答.

我的技术堆栈:

• Hibernate:4.0.1.Final
• 春天:3.1.1.RELEASE
• Primefaces:3.5
• jsf-version:2.2.0-m08
• PrimefacesMobile版本:0.9.3
• Apache Tomcat/7.0.12