Java Installation and Configuration¶

1. Install Java using Chocolatey:

   choco install temurin17
   

2. JAVA_HOME (Run in PowerShell as Administrator):

       [Environment]::SetEnvironmentVariable(
       "JAVA_HOME",
       "C:\Program Files\Eclipse Adoptium\jdk-17.0.10.7-hotspot",
       [System.EnvironmentVariableTarget]::Machine)
   

3. Add Java to PATH (Run in PowerShell as Administrator):

   [Environment]::SetEnvironmentVariable(
       "Path",
       [Environment]::GetEnvironmentVariable("Path", "Machine") + ";%JAVA_HOME%\bin",
       [System.EnvironmentVariableTarget]::Machine)
   

4. Verify installation (open a new PowerShell window):

   java --version
   echo $env:JAVA_HOME
   

1. Install Java:

   brew install --cask temurin17
   

2. Add Java environment variables to your shell configuration (for zsh):

   echo 'export JAVA_HOME=$(/usr/libexec/java_home -v 17)' >> ~/.zshrc
   echo 'export PATH=$JAVA_HOME/bin:$PATH' >> ~/.zshrc
   

3. Create a helper function to switch Java versions (optional):

   echo 'function setjdk() {
       export JAVA_HOME=$(/usr/libexec/java_home -v $1)
       echo "JAVA_HOME set to $JAVA_HOME"
       java -version
   }' >> ~/.zshrc
   

4. Reload shell configuration:

   source ~/.zshrc
   

5. Verify installation:

   java --version
   echo $JAVA_HOME
   

1. Install Java:

   sudo apt-get update
   sudo apt-get install -y temurin-17-jdk
   

2. Set JAVA_HOME and update PATH (for bash):

   echo 'export JAVA_HOME=$(readlink -f /usr/bin/java | sed "s:/bin/java::")' >> ~/.bashrc
   echo 'export PATH=$JAVA_HOME/bin:$PATH' >> ~/.bashrc
   

   For zsh users:

   echo 'export JAVA_HOME=$(readlink -f /usr/bin/java | sed "s:/bin/java::")' >> ~/.zshrc
   echo 'export PATH=$JAVA_HOME/bin:$PATH' >> ~/.zshrc
   

3. Reload shell configuration:

   # For bash
   source ~/.bashrc
   
   # For zsh
   source ~/.zshrc
   

4. Verify installation:

   java --version
   echo $JAVA_HOME
   

If Java command is not recognized after installation: 1. Open System Properties (Win + R, type sysdm.cpl) 2. Click "Environment Variables" 3. Verify JAVA_HOME exists and points to correct directory 4. Verify Path includes %JAVA_HOME%\bin 5. Open new command prompt to test

• "Java command is not recognized":

ls -l /Library/Java/JavaVirtualMachines/ # Verify Java installation

• Verify JAVA_HOME

/usr/libexec/java_home -V

• If Java command is not recognized:

# Check Java alternatives
    sudo update-alternatives --config java

    # Verify installation path
    which java
    readlink -f $(which java)

• Create a .gitconfig file in your home directory:

  notepad "$env:USERPROFILE\.gitconfig"
  

• Add basic Git configuration:

  [user]
      name = Your Name
      email = your.email@example.com
  [core]
      autocrlf = true
      editor = notepad
  

• Recommended aliases for your .zshrc:

  # Java and Maven helpers
  echo 'alias j17="setjdk 17"' >> ~/.zshrc
  echo 'alias mvnc="mvn clean"' >> ~/.zshrc
  echo 'alias mvnp="mvn package"' >> ~/.zshrc
  echo 'alias mvni="mvn install"' >> ~/.zshrc
  

• Recommended Git helpers

  echo 'alias gs="git status"' >> ~/.zshrc
  echo 'alias gp="git pull"' >> ~/.zshrc
  echo 'alias gc="git commit"' >> ~/.zshrc
  

• Java and Maven helpers

  echo 'alias j17="export JAVA_HOME=/usr/lib/jvm/temurin-17-jdk"' >> ~/.bashrc
  echo 'alias mvnc="mvn clean"' >> ~/.bashrc
  echo 'alias mvnp="mvn package"' >> ~/.bashrc
  echo 'alias mvni="mvn install"' >> ~/.bashrc
  

• Git helpers

  echo 'alias gs="git status"' >> ~/.bashrc
  echo 'alias gp="git pull"' >> ~/.bashrc
  echo 'alias gc="git commit"' >> ~/.bashrc