wait

Java Swing: Waiting for Mouse Clicked event before returning an Int [duplicate]

由 寵の児 提交于 2019-12-11 23:18:27
问题 This question already has answers here : Swing GUI doesn't wait for user input (2 answers) Closed 3 years ago . I have a card game and which is built on using ArrayLists to store the cards in peoples hands. I have a main method which plays through the game and updates the GUI class using threads called using InvokeLater in the main class At the moment I'm playing the game on the console and inputting and int into a scanner to make the selection of card from the players hand. What I want to do

How do I pause a JFrame while another is running [duplicate]

由 两盒软妹~` 提交于 2019-12-11 21:02:22
问题 This question already has an answer here : How to wait for a JFrame to close before continuing? (1 answer) Closed 6 years ago . I'm making a Server with a database inside, but while I'm loading the main JFrame and while I'm connecting to the database reading username & password from a .properties file I chosed to let the user know that the program is running, what the program is doing in that specific moment, and also let him create a .properties file if it not exists (first launch). The

Interprocess Communication fork() - Timing wait() and/or sleep()

由 二次信任 提交于 2019-12-11 20:53:58
问题 I've been asked to develop the consumer (client) side to a producer (server), where the producer creates processes, waits until the consumer has read shared memory and deleted processes, then passes control back to the producer for the killing of processes and the shutting down of the shared memory block. I've researched the difference between sleep and wait, and realise that as soon as fork() is called, the child process begins running. The below code is after the creation of processes and

sleep（）和wait（）

由 跟風遠走 提交于 2019-12-11 20:31:07
一、两者共同点： 　　1）他们都是在多线程的环境下，都可以在程序的调用处阻塞指定的毫秒数，并返回。 　　2）wait()和sleep()都可以通过interrupt()方法打断线程的暂停状态，从而使线程立刻抛出InterruptedException。如果线程A希望立即结束线程B，则可以对线程B对应的Thread实例调用interrupt方法。如果此刻线程B正在wait/sleep/join，则线程B会立刻抛出InterruptedException（是线程自己从内部抛出的，并不是interrupt()方法抛出的。对某一线程调用interrupt()时，如果该线程正在执行普通的代码，那么该线程根本就不会抛出InterruptedException。但是，一旦该线程进入到 wait()/sleep()/join()后，就会立刻抛出InterruptedException 。），在catch() {} 中直接return即可安全地结束线程。 二、两者不同点： 　　1）每个对象都有一个锁来控制同步访问。Synchronized关键字可以和对象的锁交互，来实现线程的同步。sleep方法没有释放锁，而wait方法释放了锁，使得其他线程可以使用同步控制块或者方法。 　　2）wait，notify和notifyAll只能在同步控制方法或者同步控制块里面使用，而sleep可以在任何地方使用。 　

Parent trying to read children exit status (or return value), fork and wait

由 夙愿已清 提交于 2019-12-11 19:09:12
问题 I'm confused. Supposedly, basing on man, and many other sources, like this: Return code when OS kills your process wait(&status) should make it possible for me to get the exit status or return value of a child process? Those 2 snippets of code, should allow me to see the exit value of it's child, and then print it. child process function: int childFunction(char in[],char logPath[]){ FILE *logFile= fopen( logPath, "a" ); if(logFile==NULL) return 1; int c=system(in); fclose(logFile); return(c);

Using Both Conditional Variables & Mutex to Synchronize Threads in C

由 天涯浪子 提交于 2019-12-11 17:24:23
问题 Edited as per commenter's request. This program creates two threads. Each thread reads from one of two specific input files, each of which contains either one letter or one '0' per line of code. The threads are supposed to read the letters into a global char array, which is then printed. The problem is that, upon reaching a '0,' the active thread must transfer control to the other thread, which should not have a '0' on that line. (We are sure that, if File 1 has a '0' on a line, then File 2,

How to get the return value of child process to its parent which was created using exec?

由 拥有回忆 提交于 2019-12-11 15:45:21
问题 I have seen similar questions here and here. The answers suggest to use WEXITSTATUS. But according to man page of WAIT(2), it has a limitation. It says: WEXITSTATUS(wstatus) returns the exit status of the child. This consists of the least significant 8 bits of the status argument that the child specified in a call to exit(3) or _exit(2) or as the argument for a return statement in main(). This macro should be employed only if WIFEXITED returned true. So, if the child returns a value larger

Android 面试题总结 Java基础篇

由 有些话、适合烂在心里 提交于 2019-12-11 15:18:11
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> #1.public,private,protected,以及不写时的区别？ ##public 为公共成员变量和函数成员，在整个类内类外都可使用,在子类变为public ##private 为私有成员变量和函数成员，只在声明的类内可以使用,子类不可用 ##protected 为受保护成员变量和函数成员，类外不可使用。类内可以使用,子类变为private ##不使用关键字 默认为类内使用。 #2.int与Integer的区别 Ingeter是int的包装类，int是基本数据类型初值为0，Ingeter是一个类初值为null。 ##结论 ①无论如何，Integer与new Integer不会相等。不会经历拆箱过程，一个引用指向堆，另一个指向专门存放他的内存（常量池），他们的内存地址不一样，所以为false ②两个都是非new出来的Integer，如果数在-128到127之间，则是true,否则为false java在编译Integer i2 = 128的时候,被翻译成-> Integer i2 = Integer.valueOf(128);而valueOf()函数会对-128到127之间的数进行缓存 ③两个都是new出来的,都为false ④int和integer(无论new否)比，都为true

discord.js send and wait before editing a message

由 随声附和 提交于 2019-12-11 14:53:11
问题 I want my bot, to send my emotes , wait 1 seconds and edit the message to my others emotes . Here's my code : message.channel.send('my emotes') .then((msg) => { setTimeout(function() { msg.edit('my other emotes'); }, 1000)}); And he send me this error : Cannot read property 'edit' of undefined Thanks you for helping me. 回答1: ok so finaly the code that works is : message.channel.send('my emote') .then((msg)=> { setTimeout(function(){ msg.edit('my others emotes'); }, 1000) }); 来源： https:/

Child processes won't die in C program

由 我怕爱的太早我们不能终老 提交于 2019-12-11 14:02:56
问题 I'm writing a C program that parses input from STDIN into words, generates a number of sort processes specified by the numsorts variable, pipes the words in a round-robin fashion to each of the sort processes, and sends the output of the sorts to STDOUT. My program works as desired and exits cleanly if the number of specified sort processes is 1, but the sort child processes don't die if the number of sort processes is greater than 1, and my program gets stuck waiting for them. The strangest
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