摘要： mikeli@dell-pc:~/code/algo_java/algs4_source_code$ jar xf algs4.jar Usage: jar {ctxui}[vfmn0PMe] [jar-file] [manifest-file] [entry-point] [-C dir] fil 阅读全文

摘要： usually use "whereis" and "locate" and "find" 1.whereis [-bmsu] filename -b:binary -m:man page -s:source file -u:unusual 2.locate filename will search 阅读全文

摘要： jdb normal usages 1.compile period javac -g, add complie information mikeli@dell-pc:~/code/algo_java$ javac -g DemToBin3.java 2.debug class in one win 阅读全文

摘要： ctrl+shift+T new window alt+1,2,3 change window delete files and directories rm : delete files rm -r: delete directories rm -rf: delete directories, f 阅读全文

摘要： Windows configuration: 1.configure path environment variable use administrator role,open cmd 2.set path variable C:\Windows\system32>setx /m PATH "%PA 阅读全文

摘要： https://blog.csdn.net/weixin_48914851/article/details/113756015 阅读全文

摘要： file structure: -rw-rw-r-- 1 mikeli mikeli 1147952 Aug 13 01:21 algs4.jar-rw-rw-r-- 1 mikeli mikeli 146 Aug 31 00:43 TestAlgs4.java mikeli@dell-pc:~/c 阅读全文

摘要： while(i<=a.length) { idx=i-1; if(a[idx]>=b[jdx]) { missionStatus=true; i++; break; System.out.printf("judge whether content after break will be execut 阅读全文

摘要： String parse to Int 1.method 1:use Integer package class, static method parseInt() int i; String s; i=Integer.parseInt(s); 2.method 2:use (int) int i; 阅读全文

摘要： 1.simple install sudo apt install libavcodec-extra2.complete install sudo apt install ubuntu-restricted-extras 阅读全文