Collection - Related information

• Is there an ordered Map? with better performance than TreeMap

  during the interview, the interviewer told me that the performance of TreeMap was not good. Could you switch to another one? at that time, I thought he was fooling me, but now I still haven t found an orderly map with better performance! ...

  Map performance Collection java

  Apr.03,2021
• Why did java.util.ArrayList repeat implements java.util.List?

  < hr > look at the ArrayList parent structure first look at ArrayList signature public class ArrayList<E> extends AbstractList<E> implements List<E>, RandomAccess, Cloneable, java.io.Serializable question: now that ...

  Design-pattern Collection java

  Apr.02,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-42ac3bf-62ac.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-42ac3bf-62ac.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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