started chapter 1 scanning

jlox/Lox.java

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+package com.craftinginterpreters.lox;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.nio.charset.Charset;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.List;
+
+public class Lox {
+    public static void main(String[] args) throws IOException {
+        if (args.length > 1) {
+            System.out.println("Usage: jlox [script]");
+            System.exit(64);
+        } else if (args.length == 1) {
+            runFile(args[0]);
+        } else {
+            runPrompt();
+        }
+    }
+
+    private static void runFile(String path) throws IOException {
+        byte[] bytes =Files.readAllBytes(Paths.get(path));
+        run(new String(bytes, Charset.defaultCharset()));
+    }
+
+    private static void runPrompt() throws IOException {
+        InputStreamReader input = new InputStreamReader(System.in);
+        BufferedReader reader = new BufferedReader(input);
+
+        for (;;) {
+            System.out.print("> ");
+            String line = reader.readLine();
+            if (line == null) break;
+            run(line);
+        }
+    }
+}

jlox/Makefile

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+##
+# jlox
+#
+# @file
+# @version 0.1
+all:
+	javac -d . Lox.java
+
+
+# end