created new directory for A3, tested Jgraph to build our CFG

Assignment-3/javaparser-1.0.0/LCA_JP1_0_0.java

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+import japa.parser.JavaParser;
+import japa.parser.ast.CompilationUnit;
+import japa.parser.ast.body.*;
+import japa.parser.ast.visitor.VoidVisitorAdapter;
+
+import java.io.FileInputStream;
+import java.io.File;
+
+public class LCA_JP1_0_0 {
+
+    public static void main(String[] args) throws Exception {
+        if (args.length == 0) {
+            System.out.println("Usage: java LCA_JP1_0_0 <JavaSourceFile>");
+            return;
+        }
+
+        FileInputStream in = new FileInputStream(new File(args[0]));
+        CompilationUnit cu = JavaParser.parse(in);
+        in.close();
+
+        LocalClassVisitor visitor = new LocalClassVisitor();
+        visitor.visit(cu, null);
+    }
+    
+    static class LocalClassVisitor extends VoidVisitorAdapter<Void> {
+        private boolean insideMethod = false;
+        
+        @Override
+        public void visit(MethodDeclaration n, Void arg) {
+            insideMethod = true;
+            super.visit(n, arg);
+            insideMethod = false;
+        }
+        
+        @Override
+        public void visit(ClassOrInterfaceDeclaration n, Void arg) {
+            System.out.println("Local class: " + n.getName());
+            super.visit(n, arg);
+        }
+    }
+}