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A transaction symbolizes a unit of work performed within a databas... 阅读全文
posted @ 2020-10-28 07:40
EvanMeetTheWorld
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Join == inner join, it selects records that have matching value in... 阅读全文
posted @ 2020-10-28 07:35
EvanMeetTheWorld
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different implementation arraylist uses dynamic array and linkedli... 阅读全文
posted @ 2020-10-28 07:28
EvanMeetTheWorld
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Abstract class have abstract and concrete methods, but interface c... 阅读全文
posted @ 2020-10-28 06:59
EvanMeetTheWorld
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Encapsulation: we hide the details of implementation, and we only ... 阅读全文
posted @ 2020-10-28 06:53
EvanMeetTheWorld
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Lamda表达式又称为闭包 是JAVA8的新特性，它允许把函数作为参数传递到方法种 而且lamda表达式的写法可谓是相当方便 大大简... 阅读全文
posted @ 2020-10-28 06:43
EvanMeetTheWorld
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It is not thread safe. because when we use put/get, or put/put the... 阅读全文
posted @ 2020-10-28 01:53
EvanMeetTheWorld
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REST represents for the representational state transfer, it’s the ... 阅读全文
posted @ 2020-10-28 01:32
EvanMeetTheWorld
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我们都知道 try catch finally 语句，就是说我们对try里面的语句是存有疑问的 一旦这段代码不能运行 那么我们就会在... 阅读全文
posted @ 2020-10-28 00:26
EvanMeetTheWorld
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class WrongInputException extends Exception { // 自定义的类 WrongIn... 阅读全文
posted @ 2020-10-28 00:02
EvanMeetTheWorld
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