Add Picocli-based program

.github/workflows/main.yml

@@ -27,3 +27,6 @@ jobs:
  - name: 'Run Java program'
  shell: bash
  run: java version.java
+ - name: 'Show help of a Java program using Picocli'
+ shell: bash
+ run: java -cp picocli-4.7.4.jar ASCIIArt.java --help

ASCIIArt.java

@@ -0,0 +1,25 @@
+import picocli.CommandLine;
+import picocli.CommandLine.Command;
+import picocli.CommandLine.Option;
+import picocli.CommandLine.Parameters;
+
+@Command(name = "ASCIIArt", version = "ASCIIArt 1.0", mixinStandardHelpOptions = true) 
+public class ASCIIArt implements Runnable { 
+
+ @Option(names = { "-s", "--font-size" }, description = "Font size") 
+ int fontSize = 19;
+
+ @Parameters(paramLabel = "<word>", defaultValue = "Hello, picocli", 
+ description = "Words to be translated into ASCII art.")
+ private String[] words = { "Hello,", "picocli" }; 
+
+ @Override
+ public void run() {
+ System.out.println(java.util.List.of(words));
+ }
+
+ public static void main(String[] args) {
+ int exitCode = new CommandLine(new ASCIIArt()).execute(args); 
+ System.exit(exitCode); 
+ }
+}

version.java

@@ -4,7 +4,7 @@
 
 class version {
  public static void main(String... args) throws Exception {
- System.out.println("Java " + Runtime.getRuntime().version());
+ System.out.println("Java " + Runtime.version());
 
  var errors = Path.of("errors.txt");
  var output = Path.of("output.txt");