import ast, astor, javalang
class CodeConverter:
    def python_to_java(self,code):
        try: t=ast.parse(code)
        except: return "// parse error\n"+code
        out=["public class Converted {","  public static void main(String[] args) {"]

        for n in t.body:
            if isinstance(n,ast.Expr) and isinstance(n.value,ast.Call) and getattr(n.value.func,'id','')=='print':
                args=", ".join(astor.to_source(a).strip() for a in n.value.args)
                out.append(f"    System.out.println({args});")
        out.append("  }"); out.append("}")
        return "\n".join(out)
    def java_to_python(self,code):
        out=["# Converted from Java"]
        try: tree=javalang.parse.parse(code)
        except: return "# parse error\n"+code
        for _,m in tree.filter(javalang.tree.MethodDeclaration):
            out.append(f"def {m.name}():\n    pass")
        return "\n".join(out)
    def convert(self,code,src,tgt):
        s,t=src.lower(),tgt.lower()
        if s=='python' and t=='java': return self.python_to_java(code)
        if s=='java' and t=='python': return self.java_to_python(code)
        return code