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[add]:some short notes
Dec 20, 2018
0542429 · Dec 20, 2018

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java.md

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java笔记

Install JDK

Windows

...

Linux

  1. unzip tar -zxvf jdk-8u151-linux-x64.tar.gz

  2. add to etc/environment

PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:$JAVA_HOME/bin"
export CLASSPATH=.:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
export JAVA_HOME=/home/soft/jdk/jdk1.8.0_151

  1. then execute source /etc/environment

  2. add to /etc/profile for set Java environment

export JAVA_HOME=/home/soft/jdk/jdk1.8.0_151
export JRE_HOME=$JAVA_HOME/jre
export CLASSPATH=.:$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH
export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH

  1. then execute source /etc/profile

  2. test java

java -version

异常

异常说明

Disable SSLCertificates does not conform to algorithm constraints ...

JDK安全设置，在jre/lib/security/java.security, 取消禁用加密算法

remove:
jdk.tls.disabledAlgorithms=SSLv3, RC4, MD5withRSA, DH keySize < 1024, \
    EC keySize < 224, DES40_CBC, RC4_40