Add file writing to write the final result

Author: SilicDev

src/pgdp/minijava/Compiler.java

@@ -1,12 +1,38 @@
 package pgdp.minijava;
 
+import pgdp.minijava.ast.SyntaxTreeNode;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.StandardOpenOption;
+
 public class Compiler {
+    private Compiler() {
+
+    }
+
     public static void main(String[] args) {
         compileFromFile("resources/input.java");
     }
 
     public static void compileFromFile(String filePath) {
         SyntaxTreeNode node = Parser.parseFromFile(filePath);
-        String out = Emitter.emit(node);
+        String out = """
+                //Generated using my MiniJavaCompiler at https://github.com/SilicDev/MiniJavaCompiler
+                """ + Emitter.emit(node);
+
+        if(filePath.startsWith("resources/")) {
+            filePath = "resources/bin/" + filePath.substring(10);
+        }
+        if(filePath.endsWith(".java")) {
+            filePath = filePath.substring(0, filePath.length() - 5) + ".jvm";
+        }
+        Path path = Path.of(filePath);
+        try {
+            Files.writeString(path, out, StandardOpenOption.WRITE, StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
     }
 }