java

Is it possible to rewrite previous line in console?

ε祈祈猫儿з 提交于 2021-02-18 10:21:55
问题 I'm trying to create process animation in my console app. Is it possible to rewrite previous lines for this needs? I know about \r but it works only with current line. If it is not possible, how could I achieve animation effect? Thanks. My console is standard Ubuntu 12.04 terminal emulator. Thanks to @MrSmith42 I made this simple demo, which shows way to overwrite lines: public class Flush { public static void main(String[] args) { for(int i = 0; i < 5; i++) { System.out.println("************

Is it possible to rewrite previous line in console?

爱⌒轻易说出口 提交于 2021-02-18 10:21:07
问题 I'm trying to create process animation in my console app. Is it possible to rewrite previous lines for this needs? I know about \r but it works only with current line. If it is not possible, how could I achieve animation effect? Thanks. My console is standard Ubuntu 12.04 terminal emulator. Thanks to @MrSmith42 I made this simple demo, which shows way to overwrite lines: public class Flush { public static void main(String[] args) { for(int i = 0; i < 5; i++) { System.out.println("************

Jedis - When to use returnBrokenResource()

北慕城南 提交于 2021-02-18 10:20:11
问题 When exactly we should use this method. On JedisConnectionException, JedisDataException or for any JedisException. There is no good API documentation for Jedis to my knowledge. try { Jedis jedis = JedisFactory.getInstance(); Pipeline pipe = jedis.pipelined(); Response<Set<Tuple>> idWithScore = pipe.zrangeWithScores(cachekey, from, to); **// some statement which may cause some other exception** Response<String> val = pipe.get(somekey); pipe.exec(); pipe.sync(); }catch (JedisConnectionException

VisualVM launcher error

五迷三道 提交于 2021-02-18 10:16:23
问题 I'm trying to use the Eclipse VisualVM launcher. It seems pretty nice, except that it seems to spawn an instance if VisualVM too late to do any profiling of my application. My application finishes execution before the profiler is even initialized; once it starts up, an error window pops up, saying: cannot open requested application . It then shows VM running Eclipse (labeled "org.eclipse.equinox.launcher.Main"). How can I get it to wait for my application and do proper profiling? 回答1: I know

VisualVM launcher error

孤者浪人 提交于 2021-02-18 10:14:31
问题 I'm trying to use the Eclipse VisualVM launcher. It seems pretty nice, except that it seems to spawn an instance if VisualVM too late to do any profiling of my application. My application finishes execution before the profiler is even initialized; once it starts up, an error window pops up, saying: cannot open requested application . It then shows VM running Eclipse (labeled "org.eclipse.equinox.launcher.Main"). How can I get it to wait for my application and do proper profiling? 回答1: I know

VisualVM launcher error

巧了我就是萌 提交于 2021-02-18 10:14:03
问题 I'm trying to use the Eclipse VisualVM launcher. It seems pretty nice, except that it seems to spawn an instance if VisualVM too late to do any profiling of my application. My application finishes execution before the profiler is even initialized; once it starts up, an error window pops up, saying: cannot open requested application . It then shows VM running Eclipse (labeled "org.eclipse.equinox.launcher.Main"). How can I get it to wait for my application and do proper profiling? 回答1: I know

罗振宇:渣男是这样炼成的

允我心安 提交于 2021-02-18 09:54:54
罗胖又搞事情了。 在收割完2018年最后一波韭菜之后,连一滴菜汤都不留给自家兄弟,竟毅然决然地单方面宣布永久取消旗下公司的年终奖制度。想不到吧,世间竟有如此厚颜无耻之人!在这里心疼跟着罗胖默默干了一年甚至更久的同学一秒钟,眼看着就要到手的年终奖,就这样长了翅膀飞走了,而且是到了年底才飞走的。早不飞晚不飞,偏偏在年底这个节点飞走,你说蹊不蹊跷? 以下是罗胖旗下公司CTO老刀写给产品技术员工的内部信,虽然文采不咋滴,病句也不少,但是理直气壮得很,牛逼之气跃然纸上,无辜之态昭然若揭。诸君请看—— 本来取消年终奖也不是什么大不了的事,毕竟近期传出类似消息的公司也并非仅此一家。况且,如果企业确实遇到经营性困难,在年终奖上节省开支,虽属无奈之举,但也无可厚非。只要公司态度诚恳,实情相告,员工即使心里不痛快,相信大多数人还是能够体谅公司的难处的。但是通读这篇内部信,非但丝毫感受不到公司的困难,也完全看不出公司对员工有哪怕一丁点的愧疚之情,反倒是字里行间流露出对员工的种种不满。越看越像是一封渣男写给糟糠之妻的休书。不信我翻译给大家看看—— 亲爱的小花: 今天跟你说件事。 前几天我的秘书已经跟你说个大概了,年初答应给你买的LV最新款,泡汤了。你先别难过,年末买LV一直以来都是你的特权,我的前几任女友别说LV了,连吃顿海底捞都是奢侈。你该知足了。 我这么做并不是因为我做生意失败了

How to groupBy object properties and map to another object using Java 8 Streams?

|▌冷眼眸甩不掉的悲伤 提交于 2021-02-18 09:53:09
问题 Suppose I have a group of bumper cars, which have a size, a color and an identifier ("car code") on their sides. class BumperCar { int size; String color; String carCode; } Now I need to map the bumper cars to a List of DistGroup objects, which each contains the properties size , color and a List of car codes. class DistGroup { int size; Color color; List<String> carCodes; void addCarCodes(List<String> carCodes) { this.carCodes.addAll(carCodes); } } For example, [ BumperCar(size=3, color

springboot整合zookeeper和dubbo

别来无恙 提交于 2021-02-18 09:49:17
序言 dubbo就是个rpc框架,之前都是一直在用,现在稍微总结下以备以后使用。 我就直接贴代码了,代码肯定能运行,如果运行不了那么看我之前的zookeeper配置,或者把我贴的代码重新复制下,实在不行请留言,我看到会回复的。 整体项目结构 项目是父子maven结构,父maven中基础jar包都依赖好了,子maven只需继承父maven,额外依赖自己的jar包就可以,其中 domain 是放实体类的, interfaceapi 是放提供者提供给消费者的接口的。 provider 是提供者 consumer 是消费者,不过真实项目中可能一个模块即是消费者又是提供者。所以自己需要的话直接写就行,用法都一样的。 2.主pom文件 <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion>

国庆放假,还要不要学习?

情到浓时终转凉″ 提交于 2021-02-18 09:34:21
那必须要啊! 可是该怎么学,学啥嘞,这种事情大家也不是一次两次了,大学期间的寒暑假,每次不都是放假前信心满满,回去我要怎样怎样,学啥学啥,又是定目标又是定计划,可是嘞? 大多数不都是拿回去的书翻都没翻开过吗? 所以,千万不要高估你的学习力,那么,这七天国庆假期,是不是就别管学习了,好好玩一把吧,这个,其实是可以的。 不过我更加建议,假期也不要停止学习啊,假期中也稍微的学点,假期结束可以让你更好的进入状态,所以,学还是要学的。 不过,我们大多数人都是不怎么喜欢做选择的,你说这七天我该学习什么呢?无从下手啊,没事,我这里给你解决。 七天的假期,说长不长,说短也不短,非常适合做一下专项知识点的学习,比如你学习的Java,可以趁着这七天假期,系统性的重温或者学习下集合啊,线程啊,虚拟机这些知识点,当然,最好自己可以写几篇文章出来,毕竟学习是要有反馈的嘛。 以上就是举个例子,大家可以根据自己的学习情况,看看自己可以学习什么,总的来说把握以下两点: 1、是个单项的知识点,框架啥的不适合,做个项目也有压力,单个知识点深入研究比较好(个人观点) 2、要有输出,可以针对自己的学习做个总结,写写博客。 我这里针对Java学习者给出学习建议: 1、可以学习集合,多线程,并发,虚拟机或者学习几个算法,再或者看看数据结构,注重量小而精,我倒是非常建议学习下集合。 2、可以找个视频看一下