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Javaã«é–¢ã™ã‚‹ryochackã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (7)

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Javaã§æ›¸ãBuilderãƒ‘ã‚¿ãƒ¼ãƒ³ã®ãƒ‘ã‚¿ãƒ¼ãƒ³ - Qiita
Builderãƒ‘ã‚¿ãƒ¼ãƒ³ å€‹äººçš„ã«Builderãƒ‘ã‚¿ãƒ¼ãƒ³ã¯ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã®ç”Ÿæˆåˆ¶å¾¡ã‚„ã€ã‚‚ã®ã«ã‚ˆã£ã¦ã¯å¯èªæ€§ãŒé«˜ãã¦å¥½ããªãƒ‘ã‚¿ãƒ¼ãƒ³ãªã‚“ã§ã™ãŒã€ãã®å®Ÿè£…ã«ã¯ç”¨é€”ã«ã‚ˆã£ã¦ã„ãã¤ã‹ãƒ‘ã‚¿ãƒ¼ãƒ³ãŒã‚ã‚‹ã®ã§ã€ã¾ã¨ã‚ã¦ã¿ã¾ã—ãŸã€‚ ç”Ÿæˆã™ã‚‹ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã®æ¡ä»¶ ã‚¯ãƒ©ã‚¹å:People ãƒ•ã‚£ãƒ¼ãƒ«ãƒ‰:String name(å¿…é ˆ), Integer age(å¿…é ˆ), String hobby(ã‚ªãƒ—ã‚·ãƒ§ãƒ³) å¿…é ˆè¦ç´ ã¯nullã‚’ç¦æ¢ Peopleã‚¯ãƒ©ã‚¹ã¯Stringã‚’è¿”ã‚Šå€¤ã¨ã™ã‚‹helloãƒ¡ã‚½ãƒƒãƒ‰ã‚’æŒã¤ ä»Šå›žã¯Builderãƒ‘ã‚¿ãƒ¼ãƒ³ã®æ¯”è¼ƒã®ãŸã‚ã€ãƒ‘ã‚¿ãƒ¼ãƒ³ä¸Šå¿…è¦ã§ãªã„é™ã‚Šgetterãªã©ã®ãƒ¡ã‚½ãƒƒãƒ‰ã¯çœç•¥ Native Builder Builderãƒ‘ã‚¿ãƒ¼ãƒ³ã§ã¯ãªãã€ãŸã ã®ã‚³ãƒ³ã‚¹ãƒˆãƒ©ã‚¯ã‚¿ã€‚Builderãƒ‘ã‚¿ãƒ¼ãƒ³ã‚’ä½¿ã„ãŸããªã‚‹ã®ã¯ã“ã‚Œã‚’ã‚„ã‚ŠãŸããªã„ã‹ã‚‰ã ã‘ã©ã€æ¯”è¼ƒã®ãŸã‚ã«è¨˜è¼‰ã€‚ class People { private S
ryochack 2017/02/23
Java

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ryochack 2017/02/22
Java
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æ–°äººç ”ä¿®ã§ãƒ‰ãƒ¤é¡”ã§æŠ«éœ²ã—ãŸã‚‰ã‚¦ã‚±ãŸEclipseã®ã‚·ãƒ§ãƒ¼ãƒˆã‚«ãƒƒãƒˆé›† - Qiita
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ryochack 2014/10/09
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Eclipse
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ãªãœ Java ã§ã‚¸ã‚§ãƒãƒªãƒƒã‚¯ã‚¹ãŒå¿…è¦ãªã®ã‹ï¼Ÿ - Java å…¥é–€
ãªãœã‚¸ã‚§ãƒãƒªãƒƒã‚¯ã‚¹ãªã®ã‹ï¼Ÿ ã‚¸ã‚§ãƒãƒªãƒƒã‚¯ã‚¹ã¯ã©ã®ã‚ˆã†ãªå•é¡Œã‚’è§£æ±ºã™ã‚‹ã‚‚ã®ãªã®ã§ã—ã‚‡ã†ã‹ï¼Ÿ ãã‚Œã‚’ç†è§£ã™ã‚‹ãŸã‚ã«ã€æ¬¡ã®ã‚ˆã†ãªç®± (Box) ã‚¯ãƒ©ã‚¹ã‚’è€ƒãˆã¾ã—ã‚‡ã†ã€‚ public class Box { Object o; public Box(Object o) { this.o = o; } public Object get() { return o; } } ã“ã‚Œã¯å˜ãªã‚‹ç®± (Box) ã‚’è¡¨ã™ã‚¯ãƒ©ã‚¹ã§ã™ã€‚ã‚³ãƒ³ã‚¹ãƒˆãƒ©ã‚¯ã‚¿ã§ä½•ã‹ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã‚’å—ã‘å–ã£ãŸã‚‰ã€ãã‚Œã‚’å†…éƒ¨çš„ã« Object åž‹ã® o ã«ä¿æŒã—ã¦ãŠãã€get ãƒ¡ã‚½ãƒƒãƒ‰ãŒå‘¼ã°ã‚ŒãŸã¨ãã«ãã‚Œã‚’è¿”ã™ã ã‘ã§ã™ã€‚ ã“ã‚Œã‚’åˆ©ç”¨ã™ã‚‹ãƒ—ãƒã‚°ãƒ©ãƒ ã‚’è€ƒãˆã¾ã—ã‚‡ã†ã€‚ Box b = new Box(123); Integer i = (Integer) b.get(); System.out.println(i); // 123 Box ã®ã‚³ãƒ³ã‚¹ãƒˆãƒ©ã‚¯
ryochack 2014/08/31
Objectåž‹ã¯ã‚³ãƒ³ãƒ‘ã‚¤ãƒ«æ™‚ã«ã‚¨ãƒ©ãƒ¼ã‚’æ¤œå‡ºã§ããªã„ãŒã€ã‚¸ã‚§ãƒãƒªãƒƒã‚¯åž‹ã¯ã‚³ãƒ³ãƒ‘ã‚¤ãƒ«æ™‚ã«ã‚¨ãƒ©ãƒ¼ã‚’æ¤œå‡ºã§ãã‚‹

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ryochack 2014/08/13
Java
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Eclipseã‚·ãƒ§ãƒ¼ãƒˆã‚«ãƒƒãƒˆã‚ãƒ¼ã¾ã¨ã‚ - wyukawa's diary
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ryochack 2014/07/22
Java

Eclipse
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ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆæŒ‡å‘ã¯ç¦æ¢ã™ã‚‹ã¹ã - ãã—ã ã®Hatena
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ryochack 2014/07/18
Java

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