Xu Hướng 12/2022 # Java Dictionary Class Example / 2023 # Top 19 View | Hoisinhvienqnam.edu.vn

Xu Hướng 12/2022 # Java Dictionary Class Example / 2023 # Top 19 View

Bạn đang xem bài viết Java Dictionary Class Example / 2023 được cập nhật mới nhất trên website Hoisinhvienqnam.edu.vn. Hy vọng những thông tin mà chúng tôi đã chia sẻ là hữu ích với bạn. Nếu nội dung hay, ý nghĩa bạn hãy chia sẻ với bạn bè của mình và luôn theo dõi, ủng hộ chúng tôi để cập nhật những thông tin mới nhất.

key-value pair mapped in the dictionary.



The get() method takes the key as the argument and returns the value that is mapped to it. If no value is mapped with the given key, it simply returns null.

Syntax: public abstract V get(Object key)

Parameters: key – key whose mapped value we want

Return: value mapped with the argument key.




The elements() method is used to represent all the values present inside the Dictionary. It is usually used with loop statements as they can then represent one value at a time.

Syntax: public abstract Enumeration elements()

Return: value enumeration in the dictionary.




As the elements() method returns the enumerated values present inside the dictionary; similarly, the keys() method returns the enumerated keys present inside the dictionary.

Syntax: public abstract Enumeration keys()

Return: The key enumeration in the dictionary.



The isEmpty() method returns a boolean value, which is true if there are no key-value pairs present inside the Dictionary. If even any single key-value pair resides inside the dictionary, it returns false.

Syntax: public abstract boolean isEmpty()

Return: It returns true if there is no key-value relation in the dictionary; else false.




The remove() method takes the key as its argument, and it simply removes both the key and the value mapped with it from the dictionary.

Syntax: public abstract V remove(Object key)

Parameters: key: a key to be removed

Return: The key enumeration in the dictionary.



The size() method returns the total number of key-value pairs present inside the Dictionary.

Syntax: public abstract int size()

Return: It returns the no. of key-value pairs in the Dictionary.

The following program code is an example of using Dictionaries in Java.

import java.util.Dictionary; import java.util.Enumeration; import java.util.Hashtable; public class Dict { public static void main(String[] args) { Dictionary dictionary = new Hashtable(); dictionary.put("Apple", "A fruit"); dictionary.put("Ball", "A round shaped toy"); dictionary.put("Car", "A four wheeler vehicle designed to accomodate usually four people"); dictionary.put("Dog", "An animal with four legs and one tail"); System.out.println("nApple: " + dictionary.get("Apple")); System.out.println("Dog: " + dictionary.get("Dog")); System.out.println("Elephant: " + dictionary.get("Elephant")); System.out.println(); for (Enumeration i = dictionary.elements(); i.hasMoreElements();) { System.out.println("Values contained in Dictionary : " + i.nextElement()); } System.out.println(); for (Enumeration k = dictionary.keys(); k.hasMoreElements();) { System.out.println("Keys contianed in Dictionary : " + k.nextElement()); } System.out.println("nThe dictionary is empty? " + dictionary.isEmpty()); dictionary.remove("Dog"); System.out.println("nDog: " + dictionary.get("Dog")); System.out.println("nSize of Dictionary : " + dictionary.size()); } }

See the output.

Finally, Java Dictionary Class Example Tutorial is over.

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The Devil’s Dictionary Of Sportswriting / 2023

The journalist Ambrose Bierce (1842-1914) vanished in Mexico before he could add sportswriting clichés to The Devil’s Dictionary. Too bad. I would have liked to have seen what Bierce made of “distraction” and “glue guy,” not to mention everyone’s favorite: “first-ballot Hall of Famer.”

“The Devil’s Dictionary of Sportswriting” is a reference guide for readers and writers alike. When discussing sportswriters, I use the “we” pronoun because I’m as guilty as anyone else.

bust (n.) — a bad draft choice, and, later, a precious commodity for “whatever-happened-to” features and listicles. Bleacher Report has published three versions of the “Biggest NFL Draft Busts of All Time.”

centerpiece (n.) — the most important player in a proposed, often-fictitious trade. Synonym: “lynchpin.”

class (n.) — one of the sportswriterly virtues. A “classy” athlete is a deferential one, both to us and to his opponents. A “classless” coach is one who skips the postgame handshake.

columnist (n.) — a writer who produces less copy than a blogger.

Grantland Dictionaries

Read them all here.

commit (n.) — short for “commitment.” On college sports recruiting sites, it means a high school player who has pledged to play for a particular school. A commit who’s wavering about his decision is said to be “soft.”

courage (n.) — in sportswriting, two kinds of athletes are courageous: those who play hurt and those who play soon after the death of a loved one.

distraction (n.) — an impediment to winning, which may take the form of a love interest, an entrepreneurial career, or an appearance in a country music video. A distraction is usually diagnosed retroactively. “The Super Bowl Shuffle” might have been the mother of all distractions, but the Bears won, so it’s the subject of a Grantland oral history.

Draft Winds (pun) — a pun headline that has been placed atop NFL draft stories since at least January 1990, when it appeared in the Sporting News.

durability (n.) — a football player’s knack for surviving a sport everyone agrees is too violent.

elite (adj.) — a quality Joe Flacco achieved on February 3, 2013.

era (n.) — an arbitrary period of time. Often demarcated by the presence or absence of a superstar: “the post-Jordan era.”

fandom (n.) — it used to be that sportswriting enforced a bogus neutrality; now, it demands that every sportswriter, at least once in his career, write a long piece explaining why he’s a fan of a team. Such pieces sometimes include lots of childhood memories and references to at least one relative (who may be dead).

fantasy sports (n.) — like fandom, a subject the sportswriter once couldn’t write about and now can’t stop writing about.

far apart (exp.) — the inevitable distance between a team and a player in a contract negotiation. The phrase may also be used in labor talks: “Gary Bettman: Sides ‘still far apart.’”

first-ballot Hall of Famer (n.) — there have been far more first-ballot Hall of Famers minted in baseball columns than in actual baseball. The phrase really means “automatic Hall of Famer.”

G.O.A.T. (slang) — short for the “greatest of all time.” It has effectively replaced the old term “goat,” which meant “choker.” Bill Buckner was a goat; Floyd Mayweather claims to be the “G.O.A.T.”

“great piece!” (exp.) — a compliment for a story that’s longer than 2,000 words.

green (adj.) — the color of outfield grass. It is often startlingly so. Paul Simon, pinch-hitting as a sportswriter in 2008: “How beautiful! The emerald green grass, the old-fashioned white facade and the dots of color that were the fans in their seats.”

glue guy (n.) — a player whose true value (or so the writer says) can’t be quantified with stats. A sportswriter favorite.

Golden Age of Sportswriting (n.) — usually the 1920s, but the phrase may refer to the glory days of Laguerre’s Sports Illustrated, Walsh’s Inside Sports, or the Gammons-Ryan-McDonough Boston Globe sports section. Stanley Woodward, 1949: “After considerable research I can find no evidence to support the theory that sports writing had any good old days. … The only thing that interests me is the modern American sports page which, as far as I can see, owes nothing to antiquity. It didn’t even evolve. It sprang full-fashioned from the forehead of Zeus.”

hardware (n.) — championships, in the form of trophies. If a player doesn’t yet have hardware, he might have “scoreboard.”

heart (n.) — an elusive quality associated with a player or team. See “identity.”

identity (n.) — When a talented team plays badly, a sportswriter goes looking for qualities it might lack. “Heart” is usually the first of these. But a team like the 2012-13 Lakers — which has a mishmash of coaches and lineups — is said to lack an “identity.”

immortal (n.) — common as a noun, i.e., “one of the immortals.” Becomes awkward when an athlete dies — an act that would seem to establish his mortality beyond all doubt. A 1953 obituary for Jim Thorpe proclaimed, “Immortal Athlete Passes.”

insider (n.) — a beat writer or league writer, repackaged for the digital age. These days, there are NFL Insiders, Red Sox Insiders, and all kinds of insiders at ESPN Insider. An insider’s job is to tweet out news a few seconds ahead of the competition.

instant analysis (n.) — analysis.

instant classic (n.) — a close game a sportswriter happened to watch live.

jonrón, un (n.) — Spanish for home run, and an occasion for the Spanish-language sportswriters to write as floridly as their English-language counterparts. The Associated Press described a 2011 Yankees-Tigers game as “una feria de cañonazos de cuatro esquinas” — a carnival of four-corner cannon blasts.

kid (n.) — an honorific for a young athlete. The sportswriter needn’t be more than a couple years older than the “kid” to use the term. It establishes that the writer, not the player, is the adult in the room.

leadership (n.) — another virtue. It usually means the ability to talk loudly in huddles and locker rooms, or else quietly, in the sense of “leading by example.” Sometimes a synonym for “unselfishness”: Tom Brady showed “his well-established leadership by reworking his contract for later years at under-market value.”

legacy (n.) — how an athlete will be viewed in a few decades, as judged by a sportswriter whose column is due in an hour.

light (n.) — the quality and color of light is a perennial concern of the sportswriter. It stretches from Grantland Rice’s “blue-gray October sky” to Buzz Bissinger’s glowing stadium lights to S.L. Price’s Aliquippa, in Western Pennsylvania, where darkness “dropped early and hard.” If you go to games, the light is indeed striking, though its quality is nearly impossible to judge from a press box.

locker-room cancer (n.) — the opposite of “clubhouse leader.”

mature (adj.) — a mature athlete, for a sportswriter, is one who spends his every waking hour on sports.

media critic (n.) — once, the title referred to Rudy Martzke or Phil Mushnick, but now, thanks to Twitter, sportswriters all gripe about and/or praise the media. This development is blamed on Internet meanies, but it probably reflects the convergence of sportswriterdom and fandom. The two things every fan does when watching sports are complain about the refs and complain about the announcers.

M.N.C. (slang) — college football’s “Mythical National Championship” — these days, the BCS title.

moment, the (n.) — an important game. If an athlete crumbles, it’s said that the moment was “too big for him.” Sometimes known as “the stage.”

motor (n.) — the measure of an athlete’s effort. A player can have a “great motor” or there can be “concerns about his motor.” When employed too often, we all sound like pit men at Daytona.

off the field (n.) — a player’s existence outside of sports. Negative when employed as an adjective: “off-the-field concerns.”

Olympics (n.) — an international grift that a sportswriter denounces from an intercontinental hotel.

power rankings (n.) — power rankings have two purposes: (1) they satisfy our lifelong desire to sort players or teams in order of greatness; (2) they make for a reliable weekly column. The word “power” is a tip-off they’re not based on empirical evidence.

prima donna (n.) — a wide receiver with a reality show.

project (n.) — the opposite of a “sure thing.”

Random Thoughts (n.) — a new name for the old “Notes” column.

ran out of time (exp.) — a long-lived phrase originally credited to Vince Lombardi, who once said something like, “We didn’t lose the game, we just ran out of time.” In December, Troy Aikman used a version when Adrian Peterson failed to break the NFL’s single-season rushing record. Like a lot of Lombardisms, the phrase has traveled outside sports. JFK conspiracist Jim Garrison wrote of his investigators, “They never stopped fighting to bring out the truth. They only ran out of time.”

says all the right things (exp.) — a compliment to an athlete who says nothing worth printing. Thus, for the writer, it’s a compliment against interest. “Since [Johnny] Manziel began to talk, he has been saying all the right things.”

scout’s take (n.) — a genre frequently used by Sports Illustrated in which an anonymous pro talent evaluator breaks down a player’s game. Terrifying for the sportswriter, the scout’s take is often pithier and better-written than his own.

scrappy (adj.) — small and hardworking. Tommy Craggs, 2009: “‘scrappy’ serves as an implicit rebuke to the super-sized stars of the so-called Steroid Era, in much the same way it once carved out a fatuous distinction between white ballplayers and black and Latino ballplayers.” At times, the opposite of “flashy.”

sex (n.) — Robert Lipsyte, 1975: “In the minds of most sportswriters, money and women are the termites of athletes’ souls.”

sexy (adj.) — interesting-looking: “a sexy matchup.”

source close to the process, a (n.) — the most anonymous tipster in sportswriting. A “source close to the process” could be a player, a general manager, an agent, or a pool boy. A writer in search of an equally vague term might try “a source familiar with the team’s thinking.”

story line (n.) — every game, from Pop Warner to the Super Bowl, has a “story line” — essentially, a theme that’s larger than the game itself. But lately, it has become trendy to use the S-word explicitly — i.e., “Top 10 Super Bowl Storylines.” Talking about story lines offers the writer a meta-defense for writing the same piece everyone else is. When Peter King writes, “Okay, we’ve gotten the obvious storylines out of the way,” it means he has done his duty and is getting to the good stuff.

Strat-O-Matic (n.) — archaic. A dice game referenced by sportswriters who grew up before Madden.

swirl (v.) — the movement of trade rumors: “Tim Tebow trade rumors swirl.” Swirling trade rumors can “die down” (passively) or be “shot down” (actively, maybe by a source close to the process). A player ignoring trade rumors is said to be “tuning them out.”

take (n.) — (1) an opinion; (2) recruiting-ese for a high schooler who’s worthy of a scholarship — i.e., “That kid’s a take.” Appropriately thievish, since the recruit will be conscripted to play for free.

tank (v.) — to lose games on purpose in order to get a better draft pick. The older, more fragrant term was “dump.”

television (n.) — Leonard Shecter, 1969: “Television is like some gentle, mindless robot carrying sports tenderly in its arms to the top of the mountain and then over the cliff.”

trade demand (n.) — when an athlete asks for a trade in private, it’s a “request.” When he asks in public, it gets elevated to a “demand.”

trade rumor (n.) — something a general manager likes to see in print.

turn heel (v.) — from pro wrestling: to become a villain suddenly or unexpectedly. “On July 8, 2010, LeBron James turned heel.”

unselfishness (n.) — the greatest of sportswriterly virtues. Our fascination with unselfishness proceeds from two assumptions: (1) athletes are inherently selfish; and (2) unselfishness, when reluctantly embraced, will always help a team win. Pete Axthelm, 1970: “Self-sacrifice must be learned, often through laborious practice and occasionally through suffering.”

upside (n.) — constant air quotes haven’t stopped “upside” from replacing “potential” in draft stories. Fittingly, the term is common in financial journalism: “Stephen Mandel’s high upside potential picks” is about actual stocks, not Geno Smith’s stock.

window (n.) — the time period during which a team can win a title. “Has Patriots’ Super Bowl window closed?” ESPN (and everyone else) asked back in January. Championship windows make for better columns when they’re closing rather than opening.

winner (n.) — a player who collects hardware, often despite a confounding lack of natural talent. When a sportswriter says, “He’s just a winner,” he has given up trying to figure out what makes the athlete win.

Minecraft Java Edition Account Migration Faq / 2023

started migrating accounts yet. We’ll let you know in the launcher when your account is ready to be migrated. WHY DO I NEED TO MIGRATE MY ACCOUNT TO A MICROSOFT ACCOUNT?

Never enter your account information on any third-party websites.

When you migrate to a Microsoft account, you will be able to activate two-factor authentication , which makes it much harder for intruders to access your account. We’ll also roll out other player safety features over time.

If you use a Mojang account, you will need to migrate to a Microsoft account in order to continue playing Java Edition.


You won’t need it anymore! After migrating you’ll use your Microsoft account to log in to the Minecraft Launcher to play the game and to chúng tôi to manage your settings.


Not right now. We’ll hav e a solution for this soon, but in the meantime , you can keep using your legacy Minecraft account to log in.


Legacy Minecraft accounts were used back in 2010-2012. You know you have one if you log in with a username instead of an email address.

Don’t worry – the only thing that’s changing is how you log in to the game!

No. If you play Java Edition, you can still only play with other players who have Java Edition.


You should first try to log in with your last known username or email and password . If you ‘re still unable to log in, or if you think your account has been compromised, please get in touch with Minecraft Support .

Make sure you have your original transaction ID to share with our team . If you do not have it, please be prepared to answer addi tional security questions.

Sign in to an existing Microsoft account, or create a new Microsoft account if you don’t already have one

Set up your chúng tôi profile – – don’t worry, you don’t need an Xbox for this!

Confirm your migration to a Microsoft account

Done! You can now play Minecraft: Java Edition with your Microsoft account

All the information in your Mojang account will transfer over, including your in-game username, worlds, content, and capes.

Yes, you will be able to keep your in-game username for Java Edition.

For more information about the transition from Mojang accounts to Minecraft accounts, see the Mojang Account Move Page.

Cấu Trúc Dữ Liệu Trong Java / 2023

Các cấu trúc dữ liệu cung cấp bởi các package tiện ích của Java rất mạnh mẽ và thực hiện các tính năng rộng rãi. Những cấu trúc dữ liệu này bao gồm những interface và class.

Để hiểu sâu hơn các khái niệm được trình bày trong chương này, mời bạn tham khảo loạt bài: .

Lớp Enumeration trong Java

Interface Enumeration bản thân nó không phải là cấu trúc dữ liệu, nhưng rất quan trong bên trong ngữ cảnh sử dụng các cấu trúc dữ liệu khác. Interface Enumeration định nghĩa để nhận các thành phần kế tiếp từ cấu trúc dữ liệu.

Ví dụ, Enumeration định nghĩa phương thức gọi là nextElement được sử dụng để lấy các thành phần tiếp theo trong cấu trúc dữ liệu chứa nhiều thành phần.

Để tìm hiểu chi tiết về interface này, bạn truy cập link sau: .

Lớp BitSet trong Java

Lớp BitSet trong Java triển khai một nhóm các bit hoặc flag mà có thể được thiết lập và xóa một cách riêng rẽ.

Class này rất hữu dụng trong trường hợp bạn muốn lưu trữ một tập các giá trị Boolean và chỉ muốn gắn từng bit các giá trị và thiết lập hoặc xóa nó thích hợp.

Để tìm hiểu chi tiết về class này, bạn truy cập link sau: .

Lớp Vector trong Java

Lớp Vector trong Java là tương tự như các mảng dữ liệu Java truyền thống, ngoại trừ việc có thể tăng lưu trữ cho các thành phần mới.

Giống như mảng, các thành phần trong đối tượng Vector có thể truy cập bởi index.

Một điều tốt về việc sử dụng Vector là bạn không phải lo lắng về việc cài đặt nó cho một kích cỡ cụ thể ngoài việc tạo ra nó, nó có thể tăng và giảm độ lớn khi cần thiết.

Để tìm hiểu chi tiết về class này, bạn truy cập link sau: .

Lớp Stack trong Java

Lớp Stack trong Java triển khai một last-in-first-out (LIFO) stack các phần tử.

Bạn có thể nghĩ về stack như một ngăn xếp thẳng đứng các đối tượng, khi bạn thêm một đối tượng mới, bạn lấy nó ở phần đầu các thành phần khác.

Khi bạn lấy một thành phần trên stack, nó lấy từ trên đỉnh xuống. Theo cách nói khác, thành phần cuối cùng mà bạn thêm vào stack sẽ là thành phần đầu tiên khi lấy ra và ngược lại.

Để tìm hiểu chi tiết về class này, bạn truy cập link sau: .

Lớp Dictionary trong Java

Lớp Dictionary là một abstract class để định nghĩa cấu trúc dữ liệu cho việc liên kết giữa các key tới value.

Nó thực sự hữu ích trong các trường hợp khi bạn muốn có thể truy cập dữ liệu thông qua một key cụ thể thay vì sử dụng một integer index.

Khi lớp Dictionary là abstract, nó chỉ cung cấp framework cho một cấu trúc dữ liệu so khớp key thay vì một sự triển khai cụ thể.

Để tìm hiểu chi tiết về class này, bạn truy cập link sau: .

Lớp Hashtable trong Java

Lớp Hashtable cung cấp các ý nghĩa về mặt tổ chức dữ liệu dựa vào cấu trúc mà người dùng định nghĩa key.

Ví dụ, một danh sách địa chỉ bạn có thể lưu trữ và xếp thứ tự dựa và key như zip code hơn là việc sử dụng tên người.

Để tìm hiểu chi tiết về class này, bạn truy cập link sau: .

Lớp Properties trong Java

Lớp properties là lớp con của Hashtable. Nó được sử dụng để duy trì danh sách các giá trị trong đó key là String và value cũng là một String.

Lớp Properties được sử dụng bởi nhiều class khác trong Java. Ví dụ, bạn có một kiểu đối tượng trả về bởi System.getProperties() để lấy về các biến môi trường.

Để tìm hiểu chi tiết về class này, bạn truy cập link sau: .

Mọi người cho thể tham gia khóa học thứ 6 của vietjackteam (đang tuyển sinh) vào đầu tháng 03/2018 do anh Nguyễn Thanh Tuyền, admin chúng tôi trực tiếp giảng dạy tại Hà Nội. Chi tiết nội dung khóa học tham khỏa link : .Các bạn học CNTT, điện tử viễn thông, đa phương tiện, điện-điện tử, toán tin có thể theo học khóa này. Số lượng các công việc Java hoặc .NET luôn gấp ít nhất 3 lần Android hoặc iOS trên thị trường tuyển dụng.

Các bạn ở xa học không có điều kiện thời gian có thể tham dự khóa Java online để chủ động cho việc học tập. Trong tháng 4/2018, VietJack khuyến mại giá SỐC chỉ còn 150k cho khóa học, liên hệ facebook admin chúng tôi để thanh toán chuyển khoản hoặc thẻ điện thoại, khóa học bằng Tiếng Việt với gần 100 video, các bạn có thể chủ động bất cứ lúc nào, và xem mãi mãi. Thông tin khóa học tại . Khóa học có rating 4.7/5 trên udemy từ nhận xét của các bạn học viên.

Mọi người có thể xem demo nội dung khóa học tại địa chỉ

Loạt bài hướng dẫn của chúng tôi dựa một phần trên nguồn tài liệu của: Tutorialspoint.com

Follow fanpage của team hoặc facebook cá nhân Nguyễn Thanh Tuyền để tiếp tục theo dõi các loạt bài mới nhất về Java,C,C++,Javascript,HTML,Python,Database,Mobile…. mới nhất của chúng tôi.

Bài học Java phổ biến tại vietjack.com:

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