Java StringBuffer Class ExampleIn the example below, we are using the object of the StringBuffer class because it provides a function that can reverse the string.import java.util.Scanner; public class String_Palindrome { // Creating object of Scanner Class public static void main(String[] args...
1.如果order by 没有利用到索引,那么将会出现fileSort,如果sort_buffer不够大,fileSort过程则需要使用临时文件 ,fileSort优化,主要通过调整环境来达到,如下 2.设置参数,优化order by 时可能出现的file sort: 将sort_buffer_size = 1M read_rnd_buffer_size = 1M 修改为sort_buffer_size = 16M read_rnd_buffe...