Map<Car, Integer> map = new HashMap<Car, Integer>(); map.put(new Car("black", "benz"), 1); map.put(new Car("black", "benz"), 2); map.put(new Car("black", "BMW"), 2); map.put(new Car("red", "benz"), 2); for(Entry<Car, Integer> entry : map.entrySet()) { System.out.println(entry.getKey().getBrand()); } System.out.println("~~~~~~~~~~~~~~~"); map.forEach((Car k,Integer v) -> System.out.println(k.getBrand() + " " + v));后面的lamdba哪里错了啊,运行就报错
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