How can I retrieve environmental variables using Java in Github Action?

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To retrieve environmental variables using Java in Github Action, you can use the System.getenv() method.

Example code:

String variableValue = System.getenv("VARIABLE_NAME");
System.out.println(variableValue);

Replace VARIABLE_NAME with the name of the environmental variable you want to retrieve.

Make sure that the environmental variable is set in the Github Action workflow before you retrieve it using Java. You can set a new value for an environmental variable using the env keyword in the workflow file.

Example workflow:

name: My Workflow
on: [push]

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
    - name: Set Environmental Variable
      run: echo "VARIABLE_NAME=value" >> $GITHUB_ENV
    - name: Run Java Code
      run: java MyJavaClass

In the above example, the Set Environmental Variable step sets a new value for the VARIABLE_NAME environmental variable using the echo command. The value can be replaced with any desired value.

The Run Java Code step then runs the MyJavaClass program, which can use the System.getenv() method to retrieve the value of VARIABLE_NAME.