build system revamp + entry pointHEADmaster

1 files changed, 43 insertions, 0 deletions

diff --git a/jlox/app/src/main/java/org/example/lox.java b/jlox/app/src/main/java/org/example/lox.java
new file mode 100644
index 0000000..e15f8ad
--- /dev/null
+++ b/jlox/app/src/main/java/org/example/lox.java
@@ -0,0 +1,43 @@
+package org.example;
+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;
+
+public class lox {
+    public static void main(String[] args) throws IOException {
+        switch (args.length) {
+            case 0:
+                RunPropmt();
+                return;
+            case 1:
+                InerpritFile(args[0]);
+                return;
+            default:
+                System.out.println("Invalid arguments");
+        }
+    }
+
+    private static void RunPropmt() throws IOException {
+        InputStreamReader inp = new InputStreamReader(System.in);
+        BufferedReader reader= new BufferedReader(inp);
+
+        while (true) {
+            System.out.print("$ ");
+            String prompt = reader.readLine();
+            if (prompt == null) break;
+            run(prompt);
+        }
+    }
+
+    private static void InerpritFile(String fileName) throws IOException {
+        byte[] bytes = Files.readAllBytes(Paths.get(fileName));
+        run(new String(bytes, Charset.defaultCharset()));
+    }
+
+    private static void run(String program) {
+        System.out.println(program);
+    }
+}