init commit

.gitignore

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+build/
+*.class

Main.java

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+public class Main {
+    public static void main(String[] args) {
+        System.out.println("Hello, World!");
+    }
+}

run.sh

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+if ! command -v javac >/dev/null 2>&1; then
+    echo "Error: javac is not installed."
+    exit 1
+fi
+
+if ! command -v java >/dev/null 2>&1; then
+    echo "Error: java is not installed."
+    exit 1
+fi
+
+if ! javac -d build Main.java; then
+    echo "Error: javac failed to compile Main.java."
+    exit 1
+fi
+
+java -cp build Main