Java 8 的Stream语法可以说是声明式bai的代码了，所du以正如名字所说，是找到任何一个就行zhi 比如：有一个Integer的集dao合[1, 3, 5, 7] e.g 1 List<Integer> list = Arrays.asList(1, 3, 5, 7); Optional<Integer> any = list.stream().findAny(); 这样出来的话，这个any肯定就是1了，因为此时stream是有顺序的，相当于一个list，把list 中 的数字按

版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。 本文链接：https://blog.csdn.net/huanghanqian/article/details/102807972 专栏收录该内容 18 篇文章0 订阅 试验了一下 java stream 中 的findAny和findFirst，发现都返回了列表 中 的第一个元素。那么，这两种方法的 区别 是什么呢？ 查看了一下 Java API document： findFirst

程序如下： /********************************************************************************************************* * 获取文件夹内所有文件名并打印到txt 中 ************************************************************

My first encounter with the Java programming language was during a one-week Java training session in 1997. I did not get a chance to use Java in a project until 1999. I read two Java books and took a Java 2 Programmer certification examination. I did very well on the test, scoring 95 percent. The th

启点CE过NP 中 文December 24 2018:Cheat Engine 6.8.2 Released: Here's a new version for the hollidays. Mainly minor improvements and some small bugfixes, but also a new 'ultimap like' feature called Code Filter for which you don't need any special hardware for. (Just an extensive list of addresses) Download: Cheat Engine 6.8.2 Fixes: Disassembler: Several disassembler instructions had a comma too many or too few ,fixed those Disassembler: Fixed the description for ret # Disassembler/Debug: Fixed the address that is being edited when a breakpoint hits while editing an instruction Assembler: Fixed assembling reg*2/4/8+unquotedsymbol Plugin: Fixed the SDK for C plugins that use the disassembler callback Hotkeys: Fixed the attach to foreground hotkey Memory Scan: Fixed the percentage scan Memory Scan: Fixed a rare situation that could cause an error Memory Scan: Simple values now works with groupscan Memory Scan Lua: Scanfiles now also get deleted if the memory scan object is freed before the scan is fully done Fill Memory: Now allows 64-bit addresses Structure Dissect: Fixed the popupmenu "change type" so it now affects all selected entries instead of just the first PointerOrPointee window: Fix the debug pointer or pointee window button text when using access instead of writes GUI: Fixed and restored the DPI Aware option in setting GUI: Some DPI fixes/adjustments here and there Graphical Memory view: Fixed DPI issues Symbolhandler: When the symbolhandler now waits till it's done, it won't wait for the structures to be parsed anymore Additions and Changes: Lua Engine: Added autocomplete DLL injection: On DLL injection failure CE tries to fall back on forced injection methods Assembler: Added multibyte NOP Plugins: Plugins can now have side dll's that are statically linked in their own folder (Windows 7 with updates and later) Debugging: Improved the FPU window editing when single stepping, allowing you to change the FPU registers Debugging: Threadview now updates when single stepping and cnanges made there will affect the currently debugged thread (before it didn't) Debugging: Added Code Filter. This lets you filter out code based on if it has been executed or not (Uses software breakpoints) Debugging: Added an option to chose if you wish to break on unexpected breakpoints, and if CE should break on unexpected breakpoints, or only on specified regions (like AA scripts) Disassembler: The comments now show multiple parameters Pointerscan: Add option to allow negative offset scanning Pointerscan: Add extra types to the display Advanced Options/CodeList: Now uses symbolnames Tutorial Game: Added a levelskip option when you've solved a step Tutorial Game: Added a secondary test Compare memory: Added a limit to the number of address values shown per row (can be changed) Address List: When the option to deactivate children is set, the children will get deactivated first Memory Scan: Add a lua script in autorun that lets you specify which module to scan ExecuteCodeEx(Let's you execute code in the target and pass parameters) Added 2 new parameters to getNameFromAddress (ModuleNames and Symbols) Added addModule and deleteModule to the symbollist class Added the ModuleLoader class which can force load dll's Fixed endUpdate for the listview Thanks go out to SER[G]ANT for updating the russion translation files already June 23 2018:Cheat Engine 6.8.1 Released: Apparently 6.8 contained a couple of annoying bugs, so here's an update that should hopefully resolve most issues. Also a few new features that can come handy Download: Cheat Engine 6.8.1 Fixes: Fixed several issues with the structure compare Fixed the commonality scanner from picking up unrelated registers for comparison Fixed speedhack hotkeys Fixed ultimap 1 Fixed a bunch of random access violations Fixed Lua dissectCode.getStringReferences now also returns the string Fixed Lua breakpoints that specify a specific function Fixed Lua toAddress when the 2nd parameter is an address Fixed assembling xmm,m32 Fixed issue when disassembling AVX instructions Fixed rightclicking r8-r9 in the registers window Fixed the plugin system for DBVM Fixed DBVM memory allocations when smaller than 4KB Additions and changes: Added translation strings for the all type settings You can now drop files into the auto assembler auto assembler commands allocnx (allocate no execute) and allocxo (allocate execute only) The memoryview windows's hexadecimalview now shows the allocationbase as well, and can be doubleclicked to go there Added support for mono dll's that do not export g_free Changed "make page writable" to multiple options Improved DBVM speed slightly added RemoteThread class object June 8 2018:Cheat Engine 6.8 Released: Cheat Engine 6.8 has been released. Lots of new features like structure compare, AVX disassembling support, lua functions, etc... Download: If you encounter bugs or have suggestions, please do not hesitate to report them in the forum, bugtracker or by e-mail. And if you have questions, don't hesitate to ask them in the forum Fixes: Fixed some more high dpi issues Fixed issues with the dropdown list in memory records Fixed pointer offset symbols not calculating properly Fixed registered binutils Fixed graphical issues with the tablist Fixed issue where memory blocks would get cut of before the page end Fixed some memory leaks Fixed some graphical issues in the addresslist Fixed rightclick on r8 and r9 in memoryview Fixed disassembling some instructions Fixed DBVM so it works on windows 1709 and later (tested on 1803) Fixed several DBVM offload crashes Fixed freeze with allow increase/decrease for 8 byte long values Fixed several issues where minimizing a window and then close it would hang CE Fixed file scanning Fixed crashes when editing memory in some some emulators Additions and changes: Text editor improvements Added hundreds of new cpu instructions Mono now has some new features like instancing of objects Mono instances window is now a treeview where you can see the fields and values "find what addresses this code accesses" can also be used on RET instructions now (useful to find callers) The graphical memory view now has a lot more options to set it just the way you need Codepage support in hexview structure data from PDB files can now be used, and are stored in a database for lookup later dissect structures form can now show a list of known structures (pdb, mono, ...) Added a "revert to saved scan" option (lets you undo changes) Added a "forgot scan" option (in case you forgot what you're doing) Pointerscan limit nodes is default on in a new ce install (remembers your choice when you disable it) Autoattach now happens using a thread instead of a gui blocking timer Some colorscheme enhancements Added a DBVM based "Find what writes/accesses" feature. (For pro users, enable kernelmode options for it to show) Changed the dissect data setup from seperate yes/no/value dialogs to a single window Added a bypass option for ultimap2 on windows 1709. When using ranges, do not use interrupts, or use DBVM Added find what writes/access to the foundlist Autoassembler scriptblocks are now grouped when written to memory Added {$try}/{$except} to auto assembler scripts Added an extra tutorial/practice target Added cut/copy/paste context menu items to pointer offset fields in add/change address, and added a context menu to the pointer destination Added an automated structure compare for two groups of addresses to find ways to distinguish between them added automatic garbage collection and settings to configure it added new functions: gc_setPassive gc_setActive reinitializeSelfSymbolhandler registerStructureAndElementListCallback showSelectionList changed the getWindowlist output MainForm.OnProcessOpened (better use this instead of onOpenProcess) enumStructureForms cpuid getHotkeyHandlerThread bunch of dbvm_ functions (needs dbvm capable cpu, and intel only atm) and more, including class methods and fields (read celua.txt) Minor patches: 06/08/2018: 6.8.0.4 - Fixed speedhack hotkey speed asignments and some commonalityscanner issues 06/09/2018: 6.8.0.5 - Fixed only when down speedhack option 06/10/2018: 6.8.0.6 - Fixed ultimap1 - Fixed ultimap2 on some systems - Fixed enableDRM() from crashing - Fixed one disassembler instruction Russian translation has been updated November 13 2017:Can't run Cheat Engine There is apparently some malware going around that blocks execution of Cheat Engine (Saying file missing, check filename, etc...) If you have been a victim of this then try this windows repair tool to fix your windows install: Download Repair Tool November 9 2017:Spanish(Latin) translation added Manuel Ibacache M. from Chile has provided us with spanish(Latin) translation files for Cheat Engine. They can be downloaded from the download section where you can find the other translation files, or right here June 7 2017:Cheat Engine 6.7 Released: Cheat Engine 6.7 has been released. New lua functions, GUI improvements, codepage scanning, several bugfixes and more(See below). Download: Cheat Engine 6.7 If you encounter bugs or have suggestions, please do not hesitate to report them in the forum, bugtracker, irc or by e-mail. And if you have questions, don't hesitate to ask them in the forum , irc Fixes: Fixed some DPI issues at some spots Fixed the "Not" scan for ALL "simple values" now also applies to the All type Fixed not adding the 0-terminator to strings when the option was set to add it Fixed ultimap hotkeys Fixed ultimap2 filtering Changing pointers in the change address dialog won't set/override global memrec and address anymore (local now) Fixed show as signed not working for custom types Fixed several issues with the structure spider Fixed 64-bit registers in the tracer getting truncated on doubleclick, and fix r8 to r15 Fixed copy/paste in the scanvalue Fixed kernelmode QueryMemoryRegions for windows build 1607 Fixed some disassembler errors Fixed lua command fullAccess Fixed text to speech if launched from a different thread Fixed clicking on checkboxes when the dpi is different Fixed the found code dialog count size Fixed mono freezing Cheat Engine when it crashes/freezes Additions and changes: Changed the processlist and added an Applications view similar to the taskmanager Small change to the tutorial first step wording Structure Dissect: Added RLE compression (by mgr.inz.player) and other things to improve filesize Structure Dissect: If setting a name, it will also be shown in the header The symbolhandler can now deal with complex pointer notations Added support for single-ToPA systems for ultimap2 Added some more spots where the history will be remebered in memoryview Memoryrecords with auto assembler scripts can now execute their code asynchronous (rightclick and set "Execute asynchronous") Kernelmode memory reading/writing is safer now Added an option to filter out readable paths in the pointerscan rescan Added "codePage" support Added font/display options to several places in CE Added a search/replace to the script editors You can now delete addresses and reset the count from "Find what addresses this code accesses" Added a statusbar to the hexview in memoryview Pointerscan for value scans now add the results to the overflow queue Opening a file and changing bytes do not change them to the file anymore (you need to explicitly save now) Added an option to the processlist to filter out system processes Added a system to let users sign their tables so you know you can trust their tables. Memory record dropdown lists can now reference those of others. USe as entry text: (memoryrecorddescription) Added an option to notify users of new versions of Cheat Engine Custom Types can now be referenced from Lua Auto assembler lua sections now have access to "memrec" which is the memory record they get executed from. Can be nil stringToMD5String now support strings with a 0 byte in them autoAssemble() now also returns a disableInfo object as 2nd parameter. You can use this to disable a script added Action and Value properties to MemoryRecordHotkey objects added screenToClient and clientToScreen for Control objects added readSmallInteger and writeSmallInteger added enableDRM() added openFileAsProcess/saveOpenedFile added saveCurrentStateAsDesign for CEForm objects added disableWithoutExecute and disableAllWithoutExecute added OnCustomDraw* events to the listview added being/endUpdate for the Strings class added SQL support added color overrides to the disassembler text added OnPaint to the CustomControl class added autoAssembleCheck to syntax check an AA script fixed the addresslist returning nil for PopupMenu (while popupMenu did work) added an timeout option for pipes added some graphical options added some low level system functions Russian translation has been updated Chinese translation has been updated May 15 2017:Korean language files Thanks to Petrus Kim there are now Korean language files for Cheat Engine. You can get them here Just extract it to the language folder in the Cheat Engine installation folder and you'll be able to use it April 13 2017:Cheat Engine for Macintosh download For the Mac users under us there is now a mac version available for download. It's based on Cheat engine 6.2 but I will be upgrading it to 6.6 and later based on the feedback I get. Tip:if you have trouble opening processes: Reboot your Mac and hold CMD+R during boot to enter the recovery console. There open the terminal (using the top menu) and enter "csrutil disable" . Then reboot and you'll be able to open most processes (Youtube video by NewAgeSoldier in case it's not clear) October 6 2016:Cheat Engine 6.6 Released: Cheat Engine 6.6 has been released. It has several fixes, new scan functionality, gui changes/improvements, Ultimap 2, better hotkeys, more programming options, and more(See below). Download: Cheat Engine 6.6 If you encounter bugs or have suggestions, please do not hesitate to report them in the forum, bugtracker, irc or by e-mail. And if you have questions, don't hesitate to ask them in the forum or irc Fixes: Fixed saving of hotkey sounds Fixed the CF flag in the disassembler stepping mode Fixed Kernelmode VirtualQueryEx for Windows 10 build 14393 Fixed DBVM for Windows 10 build 14393 Fixed the shortest assembler instruction picking for some instructions Fixed a few bugs in the break and trace routine when you'd stop it while the thread still had a single step set Fixed several ansi to UTF8 incompatbilities that poped up between 6.5 and 6.5.1 Fixed the stackview not properly setting the color, and giving an error when trying to change a color Fixed the exe generator not adding both .sys files or the .sig files when using kernel functions Fixed some places of the disassembler where it helps guessing if something is a float or not When using the code finder, it won't show the previous instruction anymore if it's on a REP MOVS* instruction Fixed an issue when editing memoryrecords with strings, where wordwrap would add newline characters Fixed D3D alpha channel for textures and fontmaps Fixed the helpfile not being searchable The installer will now mark the CE destination folder as accessible by APPS. (fixes speedhack for some APPS) Fixed the form designed crashing is resized 'wrong' Additions and changes: Ultimap 2 for Intel CPU's of generation 6 and later (no DBVM needed for those) Language select if you have multiple language files for CE Memoryrecord pointer offsets can use calculations, symbols and lua code now While stepping in the debugger you can now easily change the EIP/RIP register by pressing ctrl+f4 changed the way CE is brought to front when a hotkey is pressed Made the GUI more adaptive to different fontsizes and DPI Several font and minor GUI changes Added DPIAware and a font override to the settings window. (DPI aware is on by default, but can be turned of if experiencing issues) Added option to enable pause by default Disassembling mega jumps/calls now show the code in one line The standalone auto assembler window will now give an option to go to the first allocated memory address Changed the point where the settings are loaded in CE's startup sequence The formdesigner now allows copy and paste of multiple objects, and uses text Added scrollbox and radiogroup to the formdesigner Added Middle, MB4 and MB5 as allowable hotkeys Added controller keys as hotkeys Single stepping now shows an indication if an condition jump will be taken Added a watchlist to the debugger Added the 'align' assembler pseudo command (allocates memory so the next line is aligned on a block of the required size) Added the 'Not' option for scans, which causes all addresses that match the given entry as invalid Changed the Unicode text to UTF-16. Text scans are now UTF8/UTF16 (no codepage) Hexview can now show and edit values in 3 different textencodings. (Ascii, UTF-8 and UTF-16) Rescan pointerscans on pointerscans that where done on a range can now change the offset speak(): Text to speech hookWndProc: a function that lets you hook the windows message handler of a window registerEXETrainerFeature: Lets you add extra files to the exe trainer file packer getFileVersion(): A function to get version information from a file mouse_event() : Lets you send mouse events to windows. (move, click, etc...) loadFontFromStream() : Lets you load a font from a memory stream. (Useful for trainers that use a custom font) added several thread synchronization objects control class: added bringToFront and sendToBack lua changes: dbk_writesIgnoreWriteProtection() now also disables virtualprotectex calls from CE loadTable() can now also load from a Stream object. the addresslist has some Color properties published for better customization the LUA server has had some new commands added so hooked code can do more efficient calls. (LUAClient dll has been updated to use them in a basic way) Russian translation has been updated French tutorial only translation has been updated as well 10/10/2016:6.6.0.1: Fixed align May 19 2016:Cheat Engine 6.5.1 Released: 6.5.1 has been released. It's mainly a bugfix version to replace 6.5 which had a few minor bugs that needed solving. Download: Cheat Engine 6.5.1 Fixes: Fixed increased value by/decreased value by for float values Fixed disassembling/assembling some instructions (64-bit) Fixed the autoassembler tokenizing wrong words Fixed several bugs related to the structure dissect window (mainly shown when autodestroy was on) Fixed a small saving issue Groupscans now deal with alignment issues better Fixed java support for 32-bit Additions and changes: Signed with a sha256 signature as well (for OS'es that support it) Changed Ultimap to use an official way to get the perfmon interrupt instead of IDT hooking (less BSOD on win10 and 8) Individual hotkeys can now play sounds Now compiled with fpc 3.0/lazarus 1.6 (Previously 2.7/1.1) You can now search in the string list PEInfo now has a copy to clipboard Some places can now deal better with mistakes Lazarus .LFM files can now be loaded and saved Fixed several incompatibilities between lua that popped up in 6.5 (due to the lua 5.1 to 5.3 change) Fixed the OnSelectionChange callback property in the memoryview object MemoryRecords now have an Collapsed property Added TCanResizeEvent to the splitter Fixed setBreakpoint not setting a proper trigger if not provided Fixed executeCode* parameter passing Fixed several memory leaks where unregistering hooks/addons didn't free the internal call object Some tableFile additions Fixed registerAssemble assembler commands Added kernelmode alloc and (un)mapping functionality Added an easy way to add auto assembler templates Added window related functions including sendMessage Added Xbox360 controller support functions Added more thread functions Post release fixes: Dealt with several gui issues like the mainform to front on modal dialogs, header resizing stuck with the cursor, treeview item selection/deletion being weird, etc... Added a disconnect to the client in pointerscans Fixed pointerscan issue with 32-bit aligned pointers in a 64-bit process Fixed a deadlock in threads when lua custom types where used Post release fixes: Dealt with several gui issues like the mainform to front on modal dialogs, header resizing stuck with the cursor, treeview item selection/deletion being weird, etc... Added a disconnect to the client in pointerscans fixed pointerscan issue with 32-bit aligned pointers in a 64-bit process Fixed a deadlock in threads when lua custom types where used Fixed pointerscan resume 6/1/2016: (major bugfix) properly fixed resume of pointerscans and alignment fix December 31 2015:Cheat Engine 6.5 Released: I'd like to announce the release of Cheat Engine 6.5 If you encounter bugs or have suggestions, please do not hesitate to report them in the forum, bugtracker, irc or by e-mail. And if you have questions, don't hesitate to ask them in the forum or irc Fixes: Fixed page exception breakpoints from not working Fixed the save as button in the lua script assigned to the table Fixed the dotnetdatacollector from not fetching parent fields Fixed disassembling of some instructions Fixed assembling some instructions Fixed assembling instructions that referenced address 80000000 to ffffffff in 64-bit targets Fixed dealing with unexpected breakpoints Fixed several issues with the network scanner. (symbols, scanspeed, threads, etc...) Fixed "going to" 64-bit registers. Fixed pointerstrings for 64-bit Fixed the addressparser in memview's hexview not handing static 64-bit addresses Fixed r8 and r9 looking broken in the memoryview window Fixed hotkeys that set a value as hexadecimal and the value is smaller than 0x10 Fixed multiline string editing for memory records Fixed dragging cheat tables into CE Fixed VEH debug for 'Modern' apps Fixed several translation issues fixed getStructureCount, writeRegionToFile, readRegionFromFile, readInteger, ListColum.GetCount fixed memoryleak in MemoryStream Several fixes to DBVM: added support for Windows 10 support for more than 8 cpu's support for newer cpu's fixed issue where calling CPUID right after setting the TF flag wouldn't trigger a breakpoint after it Additions and changes: Array of Byte's can now deal with nibble's. (e.g: 9* *0 90 is now a valid input- and scanstring) The auto assembler can now deal with some mistakes like forgetting to declare a label Added support to use binutils as assembler and disassembler, and a special scripting language for it Added support for 64-bit mono, and script support for cases where mono.dll isn't called mono.dll Added an option to get a list of all recently accessed memory regions. This is useful for the pointerscanner The pointerscanner can now use multiple snapshots (pointermaps) to do a scan. This basically lets you do a rescan during the first scan, saving your harddisk Made the pointerscan network scanner a bit easier to use. You can now join and leave a pointerscan session You can now stop pointerscans and resume them at a later time Pointerscan files can get converted to and from sqlite database files The pointerscan configuration window now has an advanced and basic mode display The all type now has a setting that lets you define what under "all" falls Custom types now also have access to the address they're being used on Split up the "(de)activating this (de)activates children" into two seperate options (one for activate, one for deactivate) Added some basic Thumb disassembling The xmplayer has been replaced with mikmod which supports many different module types (in lua you still call it xmplayer) Rightlicking on "your system supports dbvm" will let you manually load DBVM for each cpu. This is usefull if for some reason your system crashes when it's done too quickly In "Find what addresses this instruction accesses" you can now open the structure dissect window of your choice in case there are others. It will also fill in the base address, so no need to recalculate yourself AA command GlobalAlloc now has an optional 3th parameter that lets you specify the prefered region Added an option to record and undo writes. (Off by default, can be enabled in settings. Memview ctrl+z will undo the last edit) Added aobscanregion(name,startaddress,stopaddress,aob) switched from Lua 5.1 to 5.3 debug_setBreakpoint can now take an OnBreakpoint parameter that lets you set a specific function just for that breakpoint added dbk_getPhysicalAddress(int) added dbk_writesIgnoreWriteProtection(bool) added getWindowList() And a bunch of other lua functions. (check out main.lua) Post release fixes (max 7 days after initial release *or 30 if a HUGE bug): 1/6/2016:Fixed structure dissect from crashing when autodestroy is on 1/6/2016:Fixed window position loading on multi monitor systems 1/6/2016:Fixed the lua customtype and 1/6/2016:Several minor gui fixe

My first encounter with the Java programming language was during a one-week Java training session in 1997. I did not get a chance to use Java in a project until 1999. I read two Java books and took a Java 2 Programmer certification examination. I did very well on the test, scoring 95 percent. The three questions that I missed on the test made me realize that the books I read did not adequately cover all of the details on all of the necessary Java topics. I made up my mind to write a book on the Java programming language. So, I formulated a plan to cover most of the topics that a Java developer needs understand to use the Java programming language effectively in a project, as well as to get a certification. I initially planned to cover all essential topics in Java in 700 to 800 pages. As I progressed, I realized that a book covering most of the Java topics in detail could not be written in 700 to 800 hundred pages. One chapter that covered data types, operators, and statements spanned 90 pages. I was then faced with the question, “Should I shorten the content of the book or include all the details that I think a Java developer needs?” I opted for including all the details in the book, rather than shortening the content to keep the number of pages low. It has never been my intent to make lots of money from this book. I was never in a hurry to finish this book because that rush could have compromised the quality and the coverage of its contents. In short, I wrote this book to help the Java community understand and use the Java programming language effectively, without having to read many books on the same subject. I wrote this book with the plan that it would be a comprehensive one-stop reference for everyone who wants to learn and grasp the intricacies of the Java programming language. One of my high school teachers used to tell us that if one wanted to understand a building, one must first understand the bricks, steel, and mortar that make up the building. The same l

在 Java 8 Stream 中 ，findFirst()返回Stream 中 的第一个元素，而findAny()返回Stream 中 的任何元素。 1. findFirst() 1.1 从整数流 中 找到第一个元素。 DemoFindFirst1. java public class DemoFindFirst1 { public static void main(String[] args) { List<Integer> list = Arrays.asList(1, 2, 3, 2

对于 中 间操作和终端操作的定义，请看《 JAVA 8 stream接口 中 间操作和终端操作》，这篇主要讲述的是stream的min，max，findFirst，findAny操作，我们先看下函数的定义 Optional<T> min(Comparator<? super T> comparator); Optional<T> max(Compa...

先上代码： public static void main(String[] args) { List<String> list1 = Arrays.asList("A1", "B1", "C1", "A2", "B2", "C2", "A3", "B3", "C3"); List<String> list2 = Arrays.asList("A1", "B1", "C1", "A2", "B2", "C2", "A3", "B3", "C3");