jre

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am on windows environment and using maven to compile my project. Although I just created the project and added the dependencies for various libararies. As I added them maven started complaining for the missing tools.jar , so i added below to my pom.xml : com.sun tools 1.6 system ${java.home}/../lib/tools.jar When i ran the maven install, i got an error for the missing jar as below : [ERROR] Failed to execute goal on project GApp: Could not resolve dependencies for project GApp:GApp:war:0.0.1-SNAPSHOT: Could not find artifact com.sun:tools

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am trying to run the following bit of code: import java.sql.DriverManager; public class Connect { public static void main(String[] args){ try{ String databaseDriver = "net.sourceforge.jtds.jdbc.Driver"; Class.forName(databaseDriver); } catch (Exception e) { e.printStackTrace(); } try{ String url = "jdbc:jtds:sqlserver://BHX:1433/Forecast;instance=SQLEPXRESS"; java.sql.Connection con = DriverManager.getConnection(url); System.out.println("Connection"); } catch (Exception e){ e.printStackTrace(); } } } My SQL server is running on port 1433

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Short version: Opening/reading mp4 files with Xuggler sometimes does not work properly but causes program to crash. Long version: In my program i read, modify and write video files. It works fine with most formats i tested (avi, flv, mpg, mkv). The Xuggler functions i use are mostly: //Example 1 IContainer container = IContainer.make(); int result = container.open(filename, IContainer.Type.READ, null); and //Example 2 IMediaReader filmReader = ToolFactory.makeReader(filename); filmReader.readPacket(); filmReader.close(); Working on mp4 file

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I'm trying to debug class loading issue in a java clied that is being run via JNLP. But -XX:+TraceClassLoading only prints 'Loaded' events and only for core classes. The other option, -verbose:class does nothing. I tried to prefix it with D and X without effect. When I use -verbose:class in a desktop java application, it prints all events just fine, but the bug does not occur here. Am I missing something or is there another way to trace class loading in JNLP? Edit : Examples of what I tried (this is what javaws call expands into):

翻译过来是：使用[SHA1PRNG]创建用于会话ID生成的SecureRandom实例花费了[271]毫秒。 1/[SHA1PRNG] java的一个基于SHA-1算法实现且保密性较强的伪随机数生成器，详见java.security.SecureRandom() 找到两种解决办法/https://blog.csdn.net/u011627980/article/details/54024974： 1）在Tomcat环境中解决 可以通过配置JRE使用非阻塞的Entropy Source。 在catalina.sh中加入这么一行：-Djava.security.egd=file:/dev/./urandom 即可。 加入后再启动Tomcat，整个启动耗时下降到Server startup in 2912 ms。 2）在JVM环境中解决 打开$JAVA_PATH/jre/lib/security/java.security这个文件，找到下面的内容： securerandom.source=file: /dev/urandom 替换成 securerandom.source=file: /dev/./urandom 但是都不奏效，后来发现本地环境jdk是1.8，jre是1.7 全部卸载后安装同一版本。最后work... Creation of SecureRandom instance

今天在学习maven的时候遇到一个错误，感觉有必要记录一下，问题很简单 问题原因：eclipse默认是运行在jre上的， 但是maven插件需要使用jdk，因此需要在eclipse修改Installed JRES >>window>>preferences>>java>>installed jres 添加jdk并应用 mavenѧϰ֮· 原文：https://www.cnblogs.com/CodeWithchenzhi/p/9245771.html 问题原因：eclipse默认是运行在jre上的， 但是maven插件需要使用jdk，因此需要在eclipse修改Installed JRES

1、错误 "C:\Program Files\Java\jdk1.8.0_161\bin\java.exe" -XX:TieredStopAtLevel=1 -noverify -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=54502 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Djava.rmi.server.hostname=localhost -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true "-javaagent:C:\JetBrains\IntelliJ IDEA 2018.1.5\lib\idea_rt.jar=54503:C:\JetBrains\IntelliJ IDEA 2018.1.5\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_161\jre\lib\charsets

4. 在 profile 末尾增加如下内容后保存退出。 export JAVA_HOME=/root/runenv/jdk1.8.0_172 export JRE_HOME=${JAVA_HOME}/jre export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib export PATH=$PATH:${JAVA_HOME}/bin:${JRE_HOME}/bin 5. 通过下面命令让JDK设置生效。 source /etc/profile 文章来源: CentOS 7.4 安装JDK

1.安装环境 在官网上下载对应的jdk版本，上传到服务器中 使用 tar -zxvf xxx 修改环境变量 # vim /etc/profile 在文件末尾加上 export JAVA_HOME=/home/soft/jdk1.8. 0_111 export JRE_HOME =${JAVA_HOME}/ jre export CLASSPATH =.:${JAVA_HOME}/lib:${JRE_HOME}/ lib export PATH =${JAVA_HOME}/bin:$ PATH 然后修改生效 #source /etc/profile 查看jdk版本： 表示安装完成了 文章来源: centos7运维篇《一》之安装jdk1.8

首先请参照博客，博主讲解的比我详细的多 /docker-volumes/java.security:/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/security/java.security 文章来源: docker宿主机目录映射tomcat的ROOT目录启动一直Deploying web application directory /opt/apache-tomcat-8.0.15-server/