[JAVA] OpenJDK installation

Since the Oracle JDK will be charged, I tried installing OpenJDK accordingly

Prerequisites

The environment is CentOS 7 OpenJDK version is 11

procedure

From RPM

1. Run the following yum command

   # yum install java-11-openjdk java-11-openjdk-devel
   

2. Set JAVA_HOME

   # echo "JAVA_HOME=$(readlink -f /usr/bin/java | sed "s:bin/java::")" | tee -a /etc/profile \
   

&& source /etc/profile ```

Bonus: Japanese font installation

1. Run the following yum command

   # yum install ipa-gothic-fonts-* ipa-pgothic-fonts-* ipa-mincho-fonts-* ipa-pmincho-fonts-* vlgothic-fonts-* vlgothic-p-fonts-*
   

2. Download the IPA font

   # curl -LkvfOJ https://ipafont.ipa.go.jp/IPAfont/IPAfont00303.zip && curl -LkvfOJ https://ipafont.ipa.go.jp/IPAexfont/IPAexfont00401.zip
   

3. Unfold and place

   # unzip IPAfont00303.zip \
   

&& unzip IPAexfont00401.zip
&& mkdir -p $JAVA_HOME/lib/fonts/fallback
&& cp -a IPAfont00303/.ttf $JAVA_HOME/lib/fonts/fallback/
&& cp -a IPAexfont00401/.ttf $JAVA_HOME/lib/fonts/fallback/ ```

When using a tar file

1. Download the OpenJDK tar file

   # curl -LkvOf https://download.java.net/java/GA/jdk11/13/GPL/openjdk-11.0.1_linux-x64_bin.tar.gz
   

2. Check for damage

   # sha256sum openjdk-11.0.1_linux-x64_bin.tar.gz
   

7a6bb980b9c91c478421f865087ad2d69086a0583aeeb9e69204785e8e97dcfd openjdk-11.0.1_linux-x64_bin.tar.gz ``` 3. Extract the tar file

```sh
# tar zxf openjdk-11.0.1_linux-x64_bin.tar.gz
```

4. Place it anywhere and pass the path

reference

-Official documentation --How to download and install prebuilt OpenJDK packages