lambda no instance(s) of type variable(s) T exist so that void conforms to R
代碼以下出現標題報錯html List<String> days = DateUtils.getDays(t.getStartTime(), t.getEndTime());
days.stream().map(v->
System.out.println(v)
); 改爲以下兩種方式都是能夠的java days.stream(
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相關文章
- 1. 方法引用錯誤：reason: no instance(s) of type variable(s) exist so that String conforms to Person
- 2. State of the Lambda
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- 9. MySQL multiple instances on Ubuntu
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