JAVAの練習用

背景
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プレイ回数419難易度(4.3) 120秒 長文
JAVAの練習用です。
順位 名前 スコア 称号 打鍵/秒 正誤率 時間(秒) 打鍵数 ミス 問題 日付
1 ku 5116 B+ 5.1 99.5% 120.0 617 3 24 2024/09/23
2 ku 4916 B 4.9 98.6% 120.0 598 8 22 2024/10/24
3 aaiu 2708 E 2.8 96.8% 120.0 336 11 13 2024/10/26
4 Mr.寄り道 708 G 0.7 92.9% 120.0 92 7 3 2024/11/14

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問題文

ふりがな非表示 ふりがな表示

(int number = 42;)

int number = 42;

(string text = ”hello, java!”;)

String text = "Hello, Java!";

(double pi = 3.14159;)

double pi = 3.14159;

(boolean istrue = false;)

boolean isTrue = false;

(char letter = ’a’;)

char letter = 'A';

(system.out.println(”hello, world!”);)

System.out.println("Hello, World!");

(int[] array = {1, 2, 3, 4, 5};)

int[] array = {1, 2, 3, 4, 5};

(for (int i = 0; i < 10; i++) { })

for (int i = 0; i < 10; i++) { }

(if (istrue) { dosomething(); })

if (isTrue) { doSomething(); }

(while (number > 0) { number--; })

while (number > 0) { number--; }

(switch (letter) { case ’a’: break; })

switch (letter) { case 'A': break; }

(try { } catch (exception e) { })

try { } catch (Exception e) { }

(list<string> list = new arraylist();)

List<String> list = new ArrayList();

(string[] words = text.split(” ”);)

String[] words = text.split(" ");

(integer.parseint(”123”);)

Integer.parseInt("123");

(math.random() * 100;)

Math.random() * 100;

(system.currenttimemillis();)

System.currentTimeMillis();

(new scanner(system.in);)

new Scanner(System.in);

(thread.sleep(1000);)

Thread.sleep(1000);

(string.format(”%.2f”, 3.14159);)

String.format("%.2f", 3.14159);

など

(arrays.sort(array);)

Arrays.sort(array);

(collections.shuffle(list);)

Collections.shuffle(list);

(pattern.compile(”[a-z]+”);)

Pattern.compile("[a-z]+");

(localdate.now();)

LocalDate.now();

(optional.ofnullable(obj);)

Optional.ofNullable(obj);

(intstream.range(0, 5).sum();)

IntStream.range(0, 5).sum();

(biginteger.valueof(1000000);)

BigInteger.valueOf(1000000);

(new thread(() -> print()).start();)

new Thread(() -> print()).start();

(string.join(”, ”, words);)

String.join(", ", words);

(arrays.fill(array, 0);)

Arrays.fill(array, 0);

(objects.requirenonnull(obj);)

Objects.requireNonNull(obj);

(math.max(10, 20);)

Math.max(10, 20);

(character.isdigit(’5’);)

Character.isDigit('5');

(double.isnan(0.0 / 0.0);)

Double.isNaN(0.0 0.0);

(runtime.getruntime().freememory();)

Runtime.getRuntime().freeMemory();

(system.getproperty(”user.home”);)

System.getProperty("user.home");

(uuid.randomuuid().tostring();)

UUID.randomUUID().toString();

(inetaddress.getlocalhost();)

InetAddress.getLocalHost();

(base64.getencoder().encode(bytes);)

Base64.getEncoder().encode(bytes);

(urlencoder.encode(”hello”, ”utf-8”);)

URLEncoder.encode("Hello", "UTF-8");

(files.list(paths.get(”.”));)

Files.list(Paths.get("."));

(executors.newfixedthreadpool(10);)

Executors.newFixedThreadPool(10);

(arrays.aslist(1, 2, 3);)

Arrays.asList(1, 2, 3);

(collections.reverse(list);)

Collections.reverse(list);

(string.valueof(42);)

String.valueOf(42);

(math.pow(2, 8);)

Math.pow(2, 8);

(objects.hash(a, b, c);)

Objects.hash(a, b, c);

(system.nanotime();)

System.nanoTime();

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