java 取得物件資訊

static void getClassInfo(Object o) {
        Class c = o.getClass();

        // 取得套件代表物件
        Package p = c.getPackage();

        out.printf("package %s;%n", p.getName());

        // 取得型態修飾，像是public、final
        int m = c.getModifiers();

        out.print(Modifier.toString(m) + " ");
        // 如果是介面
        if (Modifier.isInterface(m)) {
            out.print("interface ");
        } else {
            out.print("class ");
        }

        out.println(c.getName() + " {");
        //-----------------------
        // 取得宣告的資料成員代表物件
        Field[] fields = c.getDeclaredFields();
        for (Field field : fields) {
            // 顯示權限修飾，像是public、protected、private
            out.print("\t"
                    + Modifier.toString(field.getModifiers()));
            // 顯示型態名稱
            out.print(" "
                    + field.getType().getName() + " ");
            // 顯示資料成員名稱
            out.println(field.getName() + ";");
        }
       
        out.println("----------------------");
        //-----------------------
        Method[] methods = c.getDeclaredMethods();
        for (Method method : methods) {
            // 顯示權限修飾，像是public、protected、private
            out.print("\t"
                    + Modifier.toString(
                            method.getModifiers()));
            // 顯示返回值型態名稱
            out.print(" "
                    + method.getReturnType().getName() + " ");
            // 顯示方法名稱
            out.println(method.getName() + "();");
        }
        out.println("}");
    }