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tomio2480 2020/05/16
java

VSCode
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tomio2480 2020/05/07
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VSCodeã§Javaã®é–‹ç™ºç’°å¢ƒæ§‹ç¯‰ã™ã‚‹æ–¹æ³• - Qiita
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tomio2480 2020/04/27
Qiita

java

programming

VSCode

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JDKã€Oracle JDKã€OpenJDKã€Java SEã£ã¦ãªã«ï¼Ÿ - Qiita
Deleted articles cannot be recovered. Draft of this article would be also deleted. Are you sure you want to delete this article? JDKã¨ã‹Java SEã¨ã‹ã‚ˆã†ã‚ã‹ã‚‰ã‚“ 2017/9ã«Oracleã®Javaã‚µãƒãƒ¼ãƒˆä½“åˆ¶ã‚„ãƒªãƒªãƒ¼ã‚¹ã‚µã‚¤ã‚¯ãƒ«ã®å¤‰æ›´ãŒã‚¢ãƒŠã‚¦ãƒ³ã‚¹ã•ã‚Œã¦ã€ã„ã‚ã„ã‚OpenJDKãŒã©ã†ã ã¨ã‹Oracle JDKãŒã©ã†ã ã¨ã‹ã„ã†è©±ãŒæµã‚Œã‚‹ã‚ˆã†ã«ãªã‚Šã¾ã—ãŸãŒã€ã„ã¾ã„ã¡æ•´ç†ã•ã‚Œã¦ã¾ã›ã‚“ã€‚ ã“ã“ã§ã¯ã€Javaã®ä¸å¿ƒçš„ãªå®Ÿè£…ã‚’ã‚ã‚‰ã‚ã™ã£ã½ã„ç”¨èªžã«ã¤ã„ã¦ã€æ•´ç†ã—ã¦ãŠã“ã†ã¨æ€ã„ã¾ã™ã€‚ é•·æ–‡ã‚ã‚“ã©ã„äººã®ãŸã‚ã«ã¾ã¨ã‚ã‚‹ã¨ã€ã“ã†ã§ã™ã€‚ Java = ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°è¨€èªžã¨å®Ÿè¡Œç’°å¢ƒã‚’ä¸å¿ƒã¨ã—ãŸé–‹ç™ºã‚¨ã‚³ã‚·ã‚¹ãƒ†ãƒ Java SE = ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°è¨€èªžã¨å®Ÿè¡Œç’°å¢ƒã€æ¨™æº–ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã®ä»•æ§˜
tomio2480 2020/04/27
Qiita

java

jdk

programming
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it-swarm.dev
tomio2480 2020/04/27
java

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IntStream - Javaå…¥é–€
IntStreamã¯ã€ãƒ—ãƒªãƒŸãƒ†ã‚£ãƒ–ã®æ•´æ•°ã®è¦ç´ ã®åˆ—ã‚’ã¤ãã£ãŸã‚Šã€ä¸¦åˆ—é›†è¨ˆå‡¦ç†ã‚’ã‚µãƒãƒ¼ãƒˆã—ã¦ã„ã¾ã™ã€‚ èªã¿æ–¹ IntStream ã„ã‚“ã¨ ã™ã¨ã‚Šãƒ¼ã‚€
tomio2480 2020/04/27
Stream

java

programming
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Javaã®Liståž‹ã¨ã¯ï¼ï¼ŸArrayListã®ä½¿ã„æ–¹ã‚’åŸºç¤Žã®åŸºç¤Žã‹ã‚‰è§£èª¬ï¼ | ä¾ã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ãƒ–ãƒã‚°
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tomio2480 2020/04/27
java

programming

åž‹
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Java byteé…åˆ—ãƒ»charé…åˆ— < - > Stringã‚¤ãƒ³ã‚¹ã‚¿ãƒ³ã‚¹ å¤‰æ› â€“ rilakkuma3xjapan's blog
tomio2480 2020/04/27
java

åž‹

programming
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tomio2480 2020/04/27
programming

java

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tomio2480 2020/04/27
Qiita

Stream

java

programming
ãƒªãƒ³ã‚¯
Java 8 Stream API ã«ãƒ†ã‚ã‚¹ãƒˆã‚’æµã—ã¦ã¿ãŸï¼ˆçµ‚ç«¯æ“ä½œç·¨ï¼‰ - Qiita
Java 8 Stream API ã«ãƒ†ã‚ã‚¹ãƒˆã‚’æµã—ã¦ã¿ã‚‹ï¼ˆç”Ÿæˆç·¨ï¼‰- Qiita Java 8 Stream API ã«ãƒ†ã‚ã‚¹ãƒˆã‚’æµã—ã¦ã¿ãŸï¼ˆçµ‚ç«¯æ“ä½œç·¨ï¼‰- Qiita Java 8 Stream API ã«ãƒ†ã‚ã‚¹ãƒˆã‚’æµã—ã¦ã¿ã¦ï¼ˆä¸é–“æ“ä½œç·¨ï¼‰- Qiita è¦ã™ã‚‹ã«ã Java 8 Stream ã¯å®Ÿè¡Œå‰ã‚‚å®Ÿè¡Œå¾Œã‚‚ãƒ‡ãƒ¼ã‚¿ã‚’ä¿æŒã—ãªã„ã€‚ Streamã‚¯ãƒ©ã‚¹è‡ªä½“ã¯ã‚³ãƒ¬ã‚¯ã‚·ãƒ§ãƒ³ã§ã¯ãªãã€æµã‚Œã¦ãã‚‹å€‹ã€…ã®è¦ç´ ã«å¯¾ã™ã‚‹æ“ä½œã®ãƒ‘ã‚¤ãƒ—ãƒ©ã‚¤ãƒ³ã‚’æ§‹æˆã—ã¦ã„ã‚‹ã ã‘ã ã€‚å¾“ã£ã¦ Stream ã‚’é€šã—ã¦åŠ å·¥ã•ã‚ŒãŸè¦ç´ ã‚’ãƒ‡ãƒ¼ã‚¿ã¨ã—ã¦æ‰±ã†ãŸã‚ã«ã¯ã€æœ€çµ‚çš„ã«ã¾ãŸä½•ã‚‰ã‹ã®ãƒ‡ãƒ¼ã‚¿æ§‹é€ ãªã‚Šå€¤ãªã‚Šã«æˆ»ã•ã‚Œãªã‘ã‚Œã°ãªã‚‰ãªã„ã€‚ ãã®ãŸã‚ã®ãƒ¡ã‚½ãƒƒãƒ‰ç¾¤ã‚’ã€Œçµ‚ç«¯æ“ä½œ(Terminal operationï¼‰ã€ã¨å‘¼ã³ã€ãã®ã»ã‹ã®ã€Œä¸é–“æ“ä½œ(Intermediate operation)ã€ã¨åŒºåˆ¥ã™ã‚‹ã€‚ ä¸é–“æ“ä½œãƒ¡ã‚½ãƒƒãƒ‰ã¯è¦ç´ ã«é©ç”¨ã™ã‚‹é–¢æ•°ã‚’ãƒ‘
tomio2480 2020/04/25
java

Qiita

programming

Stream
ãƒªãƒ³ã‚¯
Program to convert IntStream to String in Java - GeeksforGeeks
tomio2480 2020/04/25
java

Stream
ãƒªãƒ³ã‚¯
Javaã®Streamçµ‚ç«¯å‡¦ç† - Qiita
Java8ã§è¿½åŠ ã•ã‚ŒãŸStreamã®çµ‚ç«¯å‡¦ç†ã§åˆ†ã‹ã‚‰ãªã„ã®ãŒçµæ§‹ã‚ã£ãŸã®ã§å‹‰å¼·ã—ã¦ã¿ã¾ã—ãŸã€‚ streamæ“ä½œã¯ã€Streamç”Ÿæˆâ‡’ä¸é–“å‡¦ç†â‡’çµ‚ç«¯å‡¦ç†ã®é †ç•ªã§å®Ÿæ–½ã—ã¾ã™ã€‚ Streamç”Ÿæˆâ‡’ä¸é–“å‡¦ç†ã ã‘å®Ÿæ–½ã—ã¦ã‚‚ã€å…ƒã®ãƒªã‚¹ãƒˆç‰ã«ã¯å½±éŸ¿ã‚’ä¸Žãˆã¾ã›ã‚“ã—ã€æˆ»ã‚Šå€¤ã‚‚ã‚ã‚Šã¾ã›ã‚“ã€‚ ä½•ã‹å‡¦ç†ã‚’ã—ãŸã„å ´åˆã€çµæžœã‚’å¾—ãŸã„å ´åˆã¯å¿…ãšçµ‚ç«¯å‡¦ç†ã‚’å®Ÿæ–½ã—ãªã„ã¨ã„ã‘ã¾ã›ã‚“ã€‚ æ°—ãŒå‘ã‘ã°ã‚‚ã£ã¨å¢—ã‚„ã—ã¦ã„ãã¨æ€ã„ã¾ã™ãŒã€ä»Šå›žã¯é©å½“ã«ãƒ”ãƒƒã‚¯ã‚¢ãƒƒãƒ—ã—ãŸã‚‚ã®ã‚’æŒ™ã’ã¦ã„ã¾ã™ã€‚ count ãã®ã¾ã¾ã‚ã‹ã‚Šã‚„ã™ã„ã§ã™ãŒã€Streamã®ä»¶æ•°ã‚’ã‚«ã‚¦ãƒ³ãƒˆã—ã¾ã™ã€‚ ãµã¤ã†ã¯filterç‰ã®ä¸é–“å‡¦ç†ã¨åˆã‚ã›ã¦ä½¿ç”¨ã—ã¾ã™ã€‚ /** * Streamçµ‚ç«¯å‡¦ç† countã‚’ç¢ºèª */ @Test public void count() { // ãã®ã¾ã¾ long count = IntStream.rangeClosed(1, 10).coun
tomio2480 2020/04/25
java

Stream

Qiita
ãƒªãƒ³ã‚¯
StringBuilder (Java Platform SE 8)
ã™ã¹ã¦ã®å®Ÿè£…ã•ã‚ŒãŸã‚¤ãƒ³ã‚¿ãƒ•ã‚§ãƒ¼ã‚¹: Serializable, Appendable, CharSequence public final class StringBuilder extends Object implements Serializable, CharSequence æ–‡å—ã®å¯å¤‰ã‚·ãƒ¼ã‚±ãƒ³ã‚¹ã§ã™ã€‚ ã“ã®ã‚¯ãƒ©ã‚¹ã¯ã€StringBufferã¨äº’æ›æ€§ãŒã‚ã‚‹APIã‚’æä¾›ã—ã¾ã™ãŒã€åŒæœŸåŒ–ã¯ä¿è¨¼ã•ã‚Œã¾ã›ã‚“ã€‚ ã“ã®ã‚¯ãƒ©ã‚¹ã¯ã€æ–‡å—åˆ—ãƒãƒƒãƒ•ã‚¡ãŒå˜ä¸€ã®ã‚¹ãƒ¬ãƒƒãƒ‰(ä¸€èˆ¬çš„ãªã‚±ãƒ¼ã‚¹)ã«ã‚ˆã‚Šä½¿ç”¨ã•ã‚Œã¦ã„ãŸå ´åˆã®StringBufferã®ç°¡å˜ãªä»£æ›¿ã¨ã—ã¦ä½¿ç”¨ã•ã‚Œã‚‹ã‚ˆã†è¨è¨ˆã•ã‚Œã¦ã„ã¾ã™ã€‚ ã“ã®ã‚¯ãƒ©ã‚¹ã¯ã€ã»ã¨ã‚“ã©ã®å®Ÿè£…ã§é«˜é€Ÿã«å®Ÿè¡Œã•ã‚Œã‚‹ã®ã§ã€å¯èƒ½ãªå ´åˆã¯ã€StringBufferã‚ˆã‚Šã‚‚å„ªå…ˆã—ã¦ä½¿ç”¨ã™ã‚‹ã“ã¨ã‚’ãŠè–¦ã‚ã—ã¾ã™ã€‚ StringBuilderã®åŸºæœ¬çš„ãªã‚ªãƒšãƒ¬ãƒ¼ã‚·ãƒ§ãƒ³ã«ã¯ã€appendãƒ¡ã‚½ãƒƒãƒ‰ãŠã‚ˆã³ins
tomio2480 2020/04/25
java

programming

string
ãƒªãƒ³ã‚¯
Java æ–‡å—ã‹ã‚‰Unicodeã‚’å–å¾—(codePointAt) | ITSakura
æ–‡å—åˆ—ã®ã†ã¡ã€å¼•æ•°ã®æ•°å€¤ã®ä½ç½®ã«ã‚ã‚‹Unicodeã‚³ãƒ¼ãƒ‰ãƒã‚¤ãƒ³ãƒˆã‚’è¿”ã—ã¾ã™ã€‚ æ–‡å—åˆ—ã®æœ€åˆã®1æ–‡å—ç›®ã®ä½ç½®ã¯0ã§ã™ã€‚ å¼•æ•°ãŒç¯„å›²å¤–ã®ã¨ãã¯ã€IndexOutOfBoundsExceptionã®ä¾‹å¤–ã‚’è¿”ã—ã¾ã™ã€‚ Java1.5ã§å°Žå…¥ã•ã‚Œã¾ã—ãŸã€‚ ä»¥ä¸‹ã¯Oracleã®Java8ã®codePointAtãƒ¡ã‚½ãƒƒãƒ‰ã®ãƒªãƒ³ã‚¯ã§ã™ã€‚ https://docs.oracle.com/javase/jp/8/docs/api/java/lang/String.html#codePointAt-int- Unicodeã‚³ãƒ¼ãƒ‰ãƒã‚¤ãƒ³ãƒˆã‚’å–å¾—ã™ã‚‹ package test1; public class Test1 { public static void main(String[] args) { String a = "ABã‚ã„"; System.out.println(a.codePointAt(0)); /
tomio2480 2020/04/25
java

programming

Unicode

æ–‡å—åˆ—
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Java Streamãƒ¡ãƒ¢(Hishidama's Java8 Stream Memo)
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tomio2480 2020/04/25
java

programming

Stream
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IntStream toArray() in Java with Examples - GeeksforGeeks
tomio2480 2020/04/25
Stream

java

programming
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tomio2480 2020/04/25
java

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Unicode

programming
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tomio2480 2020/04/25
java

programming

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tomio2480 2020/04/25
java

programming

Scanner
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