OpenJDK

导航目录 Win10下编译OpenJDK8 相关参考文章 编译环境 编译前准备 1.安装 Visual Studio 2010 Professional 2. 准备OpenJDK8 3. 编译JDK环境安装 4. 安装Cygwin 5. 准备FreeType-2.7 开始编译 1.生成编译配置脚本 2.编译JDK 3.验证编译结果 失败问题处理 1.提示cygwin太老，但使用的cygwin确实是1.7版本以后的版本 2.编译images库时失败 Win10下编译OpenJDK8  踩了无数的坑之后终于成功的在Windows10下编译了OpenJDK8，在Windows下编译JDK确实比较麻烦，所以在这里记录下本人编译的整个过程，可以作为备忘的同时还能分享给他人 相关参考文章 文本在编写和实施过程中参考了如下的博文或文章： https://blog.csdn.net/wqlinloveruby/article/details/80409031 https://www.jianshu.com/p/e85f93cc74cb OpenJDK源码目录下的README-builds.html官方文档 编译环境 Windows10专业版64位； 编译前准备   Tip： 以下软件的安装和解压目录尽量不要包含中文或空格，不然可能会出现问题 1.安装 Visual Studio 2010

1、搜索jdk安装包 # yum search java|grep jdk 2、下载jdk1.8，下载之后默认的目录为： /usr/lib/jvm/ # yum install java-1.8.0-openjdk 3、配置环境变量： （自己测试的时候，没有设置这个步骤也可以直接运行 java -version） # vi /etc/profile 将如下配置添加至文件中，然后保存退出。 #java export JAVA_HOME=/usr/java/jdk1.8.0_181 export PATH=$JAVA_HOME/bin:$PATH export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib 4、验证： 来源： https://my.oschina.net/zhangmaoyuan/blog/3112378

I searched the internet for more than couple of hours and could not reach any conclusion. Recently I decided to use BouncyCastle for SSL but I wanted it to off by default, so that BouncyCastle jar may not be in the class path. private void enableBouncyCastleForSSL() { if (config.isBouncyCastleEnabled()) { Security.insertProviderAt(new BouncyCastleProvider(), 1); } } Even when config is disabled, it was looking for BouncyCastle and it failed with class loader error. java.lang.NoClassDefFoundError: org/bouncycastle/jce/provider/BouncyCastleProvider I tried moving just the line Security

[root@localhost ~]# systemctl stop firewalld [root@localhost ~]# iptables -F [root@localhost ~]# setenforce 0 安装两个Tomcat与一个Nginx 一：安装配置Tomcat 方法一 [root@localhost ~]# which java //查看旧版本JAVA路径 /usr/bin/java [root@localhost ~]# rm -rf /usr/bin/java //卸载掉旧JAVA版本 方法二 [root@localhost ~]# rpm -qa | grep -i openjdk //查看自己安装JDK的版本信息 java-1.7.0-openjdk-1.7.0.171-2.6.13.2.el7.x86_64 java-1.7.0-openjdk-headless-1.7.0.171-2.6.13.2.el7.x86_64 java-1.8.0-openjdk-1.8.0.161-2.b14.el7.x86_64 java-1.8.0-openjdk-headless-1.8.0.161-2.b14.el7.x86_64 #卸载相关的JDK软件 [root@localhost ~]# rpm -e java-1.7.0-openjdk [root

I wrote the following Java program to dump the enabled ciphers in the JVM: import java.security.KeyStore; import javax.net.ssl.KeyManagerFactory; import javax.net.ssl.SSLContext; import javax.net.ssl.SSLSocket; import javax.net.ssl.TrustManagerFactory; public class ListCiphers { public static void main(String[] args) throws Exception { SSLContext ctx = SSLContext.getInstance("TLSv1"); // Create an empty TrustManagerFactory to avoid loading default CA KeyStore ks = KeyStore.getInstance("JKS"); TrustManagerFactory tmf = TrustManagerFactory.getInstance("SunX509"); tmf.init(ks); ctx.init(null, tmf

I understand that the Oracle Java SE contains closed source extensions and tools that are not part of the OpenJDK however is the Oracle Java SE JVM identical to the OpenJDK JVM or does Oracle make changes to the OpenJDK JVM before releasing it as a Java SE JVM? Update 1: I found some info from the JDK7 updates projects: http://openjdk.java.net/projects/jdk7u/qanda.html Will the 7 Update Project receive security fixes from Oracle? Yes. As with OpenJDK 6, security fixes are first kept confidential and applied to a private forest before being pushed to the public forest as part of the general

Eclipse gives me an error: '<>' operator is not allowed for source level below 1.7 I guess this is because it is not using java 1.7. Except that it is. At least openjdk 1.7 (my OS is OpenSuse 12.3). I switched back from kepler to juno to reduce some lags and try to figure out this bug as well, to no avail so far. Some things I have tried: - the default runtime for eclipse is opensdk 1.7 (says so in help, about, installation details) - project properties, java build -> library. I have manually added the opensdk location. I would install the oracle version, but there is only 1.6 available from

Where can I find a simple set of instructions to compile an OpenJDK 7 debug build on Ubuntu 11.10 (Oneiric)? A debug build would make more JVM options available for troubleshooting purposes; for example, WizardMode . The developers' guide and build README have a lot of noise and are hard to follow. Install relevant packages: sudo apt-get install ant build-essential openjdk-6-jdk sudo apt-get build-dep openjdk-6-jdk Find the master OpenJDK Mercurial repository you want to start from. These instructions will use jdk7u2 . Command examples contain settings to allow Internet access through a proxy