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Exception Basic concepts In the Java language, abnormal conditions occurring in program execution are called "exceptions". (syntax and logic errors in the development process are not exceptions) Abnormal events during execution can be divided into two categories: Error: a serious problem that the Java virtual machine cannot solve. ...

It should have been updated yesterday, but when using the browser to access the web port of the server's RabbitMQ, chrome shows that it is not a private link and does not allow you to log in to the Edge. Baidu has found many problems and still can't solve them. The reason is that the server doesn't install SSL certificate and uses ip directly t ...

1, Introduction to HashMap HashMap is one of our commonly used collection frameworks. The underlying implementation is array + linked list + red black tree. The elements are out of order, that is, the storage order is not necessarily in the order of addition. Synchronization is not supported, that is, the thread is unsafe. 2, Key parameters o ...

Through the disassembly code, see if you can see the address of a reference variable to know whether it occupies memory space. Test code: int main(){ int num = 6; int &r = num; int *p = # int x = r; int y = *p; return 0; } 1. X86-64 platform Obtain the disassembly code of the main function through GDB or ...

1, Introduction to Seata Seata is an open source distributed transaction solution, which is committed to providing high-performance and easy-to-use distributed transaction services. Seata will provide users with AT, TCC, SAGA and XA transaction modes to create a one-stop distributed solution for users. 2, Software version Software edition ...

After the experiment of lab1 is completed, start lab2, which mainly realizes memory allocation Purpose of the experiment: Understand the translation mechanism based on segment page memory addressUnderstand the establishment and use of page tableUnderstand how to manage physical memory In lab1, we use segment management, and the addresses inv ...

Project introductionBuilding block report, a free Visual Web Report tool, online drag and drop design like building blocks! Functions include data report, print design, chart report, large screen design, etc!Adhering to the product concept of "simple, easy-to-use and professional", it greatly reduces the difficulty of report developme ...

Feasible pruning Cut down unnecessary subtrees on the search tree through some judgment. Sometimes, we will find that the subtree state corresponding to a node is not the result we want, so we don't need to search this branch. Cutting off this subtree is pruning. Once the final solution of some states can not be found in any case, it can ...

1. call() Syntax: fun.call(thisArg，arg1，arg2，...) fun: represents a functionIf the object "this" and "this" are to point to the global object, then "this" and "this" are to point to the global object;Starting from arg1, it is the parameter to be passed to fun. characteristic: fun.call(thisArg，arg1 ...

343. Integer splittingLink to force button topic: https://leetcode-cn.com/problems/integer-breakGiven a positive integer n, split it into the sum of at least two positive integers and maximize the product of these integers. Returns the maximum product you can obtain.Example 1:Input: 2Output: 1Explanation: 2 = 1 + 1, 1 × 1 = 1. Example 2: ...