import java.io.*; public class GenerateMkfile { 	public static void main(String[] args) {		if (args.length == 0) {			System.out.println("Generates or updates the mkfile for java");			System.out.println("package in inferno java subsystem.");			System.out.println();			System.out.println("Usage: specify the package dir");			return;		}				File dir = new File(args[0]);		if (!dir.exists() || !dir.isDirectory()) {			System.out.println("The path must be existing directory");			return;		}				StringBuilder result = new StringBuilder();		result.append("TARG=\\").append('\n');				File[] files = dir.listFiles();		for (File f: files) {			if (f.isFile() && f.getName().endsWith(".java"))				result.append('\t').append(f.getName()).append("\\\n");		}	} }