fixed folder structure + lab4 less hardcode, cleanup

src/Lab1/Grammar.java

@@ -0,0 +1,58 @@
+package Lab1;
+
+import java.util.*;
+
+public class Grammar {
+    private final String SS;
+    private final FiniteAutomaton FA;
+
+    public Grammar(String SS, Set<String> VT, Map<String, List<String>> P) {
+        this.SS = SS;
+        this.FA = new FiniteAutomaton(SS, VT, generateTransitions(P));
+    }
+
+    public Map<String, Map<String, String>> generateTransitions(Map<String, List<String>> P) {
+        Map<String, Map<String, String>> transitions = new HashMap<>();
+        for (Map.Entry<String, List<String>> entryP : P.entrySet()) {
+            String state = entryP.getKey();
+            List<String> productionList = entryP.getValue();
+            Map<String, String> stateTransitions = new HashMap<>();
+            for (String production : productionList) {
+                String symbol = production.substring(0, 1);
+                String nextState = production.length() > 1 ? production.substring(1) : "OK";
+                stateTransitions.put(symbol, nextState);
+            }
+            transitions.put(state, stateTransitions);
+        }
+        return transitions;
+    }
+
+    public boolean isValid(String word) {
+        return this.FA.isValid(word);
+    }
+
+    public void generateWords(int numWords) {
+        List<String> generatedWords = new ArrayList<>();
+        Random random = new Random();
+
+        for (int i = 0; i < numWords; i++) {
+            StringBuilder wordBuilder = new StringBuilder();
+            String currentState = SS;
+
+            while (!currentState.equals("OK")) {
+                Map<String, String> transitions = FA.getTransitions().get(currentState);
+                List<String> symbols = new ArrayList<>(transitions.keySet());
+                String symbol = symbols.get(random.nextInt(symbols.size()));
+                wordBuilder.append(symbol);
+                currentState = transitions.get(symbol);
+            }
+
+            generatedWords.add(wordBuilder.toString());
+        }
+
+        System.out.println("===================================");
+        for (String word: generatedWords) {
+            System.out.println(word + " " + (isValid(word) ? "- Valid" : "- Not valid"));
+        }
+    }
+}