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How to properly import a selfsigned certificate into Java keystore that is available to all Java app
I do want to import a self signed certificate into Java so any Java application that will try to establish a SSL connection will trust this certificate.
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tcp端口状态ESTABLISHED、TIME_WAIT、CLOSE_WAIT 、SYN_RECV等详解 - C/C++...
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net.ipv4.tcp_fin_timeout 修改系統默认的 TIMEOUT 时间
查看系统TCP连接资源命令
netstat
netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}'
一般情况下，系统的socket资源默认5000个。（非官方）
Windows Dos命令：netstat -an | find "端...
How do I set environment variables from Java?
How do I set environment variables from Java? I see that I can do this for subprocesses using ProcessBuilder . I have several subprocesses to start, though, so I'd rather modify the current process's environment and let the subprocesses inherit it.
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What are the rules for evaluation order in Java?
I am reading some Java text and got the following code:
5 Answers
5
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What is the C# equivalent to Java's isInstance()?
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The equivalent of Java’s obj.getClass().isInstance(otherObj) in C# is as follows:
bool result = obj.GetType().IsAssignableFrom(otherObj.GetType());
Note that while both Java and C# work on the runtime type object (Java java.lang.Class ≣...
Differences between Java 8 Date Time API (java.time) and Joda-Time
I know there are questions relating to java.util.Date and Joda-Time. But after some digging, I couldn't find a thread about the differences between the java.time API (new in Java 8 , defined by JSR 310 ) and Joda-Time .
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Removing Java 8 JDK from Mac
...wing steps:
Run this command to just remove the JDK
sudo rm -rf /Library/Java/JavaVirtualMachines/jdk<version>.jdk
Run these commands if you want to remove plugins
sudo rm -rf /Library/PreferencePanes/JavaControlPanel.prefPane
sudo rm -rf /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugi...
Difference between namespace in C# and package in Java
... the difference (in terms of use) between namespaces in C# and packages in Java?
6 Answers
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Run class in Jar file
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Use java -cp myjar.jar com.mypackage.myClass.
If the class is not in a package then simply java -cp myjar.jar myClass.
If you are not within the directory where myJar.jar is located, then you can do:
On Unix or Linux platfor...
How to convert an Array to a Set in Java
I would like to convert an array to a Set in Java. There are some obvious ways of doing this (i.e. with a loop) but I would like something a bit neater, something like:
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