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java中的ArrayList為什么沒有以數(shù)組為參數(shù)的構(gòu)造器？

今天看到Arrays.asList()方法中使用的是一個(gè)私有的ArrayList使用了參數(shù)為數(shù)組的構(gòu)造器，為什么ArrayList本身不帶有這樣的構(gòu)造器呢？

From [Javadiscussion group] 2016-10-25 15:25:45 0  1  1174

java - Is it necessary to add signature verification based on HTTPS two-way authentication?

Direct communication between enterprise systems is based on HTTPS two-way authentication. Is it necessary to a...

From [Javadiscussion group] 2017-06-23 09:13:02 0  2  1173

Alibaba Java Development Manual——Comparator

The picture above is the description in "Alibaba Java Development Manual v1.2.0". Here is a countere...

From [Javadiscussion group] 2017-05-27 17:40:39 0  3  1173

Java中的BufferedImage在Android之中如何對(duì)應(yīng)？

javax.imageio.ImageIO;javax.imageio.ImageReader;javax.imageio.stream.ImageInputStream以及BufferedImage這些如何在Andro...

From [Javadiscussion group] 2017-04-18 10:47:00 0  1  1172

java - maven打包導(dǎo)致二進(jìn)制文件大小被改變

使用class.getClassLoader().getResourceAsStream()這種方法獲取classpath下的文件流，讀取出來的文件比寫main方法讀出來的文件大小更大。 問題已經(jīng)解決。 本地main方法...

From [Javadiscussion group] 2017-04-18 10:47:12 0  1  1171

java - tomcat可以脫離myeclipse獨(dú)立運(yùn)行項(xiàng)目嗎？

啟動(dòng)項(xiàng)目總是要在myeclipse中用tomcat啟動(dòng)，能不用myeclipse直接用tomcat或者別的服務(wù)器啟動(dòng)項(xiàng)目嗎？

From [Javadiscussion group] 2017-04-18 10:15:58 0  18  1171

java - SSH登錄注冊(cè)異常

在注冊(cè)的時(shí)候會(huì)出現(xiàn)以下異常 同時(shí)在代碼中的的第32行出現(xiàn)異常上面異常``javaHTTP Status 500 - could not extract ResultSet type Exception report me...

From [Javadiscussion group] 2017-04-17 17:23:27 0  3  1171

java - Image verification code implementation principle

**Test website: http://con.monyun.cn:9960/acc... There is a verification code on this page. The url of this ve...

From [Javadiscussion group] 2017-05-27 17:41:18 0  4  1170

java - centos服務(wù)器CPU被GC task占滿，程序無內(nèi)存溢出

環(huán)境：服務(wù)器為centos，2個(gè)8核16線CPU，內(nèi)存64G，jdk版本1.7.0_67 問題描述：服務(wù)器部署的java應(yīng)用，jvm堆內(nèi)存為8G，啟動(dòng)一段時(shí)間后CPU占用飆升到2300% jstack查看獲得如下信息: ...

From [Javadiscussion group] 2017-04-18 10:31:17 0  0  1170

Why in Java, when assigning variables i3, i4 with the same data type, System.out.println(i3==i4), the final output is not equal?

System.out.println(i3==i4), why the output result is not true {code...}

From [Javadiscussion group] 2017-06-28 09:24:50 0  2  1169

學(xué)JAVA需要安裝什么軟件？

From [Javadiscussion group] 2017-03-02 17:36:46 0  2  1169

java - Android 弱網(wǎng)絡(luò)環(huán)境下與服務(wù)器交互怎么實(shí)現(xiàn)？？？

現(xiàn)在項(xiàng)目上有這么個(gè)需求，客戶拿著APP去一個(gè)深山老林里(或者去一個(gè)偏僻的村莊)去和核查情況，網(wǎng)絡(luò)情況不是很好，有可能是2G網(wǎng)絡(luò) 也有可能時(shí)刻斷網(wǎng)，但是他要通過APP與服務(wù)器交互了，首先是登錄就要與服務(wù)器交互，...

From [Javadiscussion group] 2017-04-18 10:30:03 0  11  1168

oop - In Java, doubts about anonymous inner classes calling external class methods

Today I learned about inner classes and learned that inner classes can hold this of outer classes, so that Out...

From [Javadiscussion group] 2017-05-17 10:07:37 0  1  1167

Garbage Collection - How to manually collect objects in java

Let’s start with the code. My goal is to make data disappear completely {code...} I know Java’s garbage collec...

From [Javadiscussion group] 2017-05-17 10:05:31 0  5  1167

JAVA, how to add 100,000 Int values ??more efficiently

How to add 100,000 int values ??more efficiently? I was sorting out the interview questions today and saw this...

From [Javadiscussion group] 2017-05-17 10:02:50 0  2  1164