[B! JAVA] tamadon3776ã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

tamadon3776 id:tamadon3776

JAVAã«é–¢ã™ã‚‹tamadon3776ã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (10)

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Javaã§æ¥å‹™ã‚¢ãƒ—ãƒªã‚’é–‹ç™ºã™ã‚‹ãŸã‚ã®ç’°å¢ƒæ§‹ç¯‰æ‰‹é †ï¼ˆWindows/Macå¯¾å¿œï¼‰
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tamadon3776 2014/06/13
JAVA

eclipse

ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°
ãƒªãƒ³ã‚¯
Javaã¯ã©ã®ã‚ˆã†ã«å‹•ãã®ã‹ï½žå›³è§£ã§ã‚ã‹ã‚‹JVMã®ä»•çµ„ã¿ è¨˜äº‹ä¸€è¦§ | gihyo.jp
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tamadon3776 2013/05/12
JAVA

ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°
ãƒªãƒ³ã‚¯
Javaã§ã•ãã•ãWebã‚¢ãƒ—ãƒªé–‹ç™º - ã—ã‚“ã•ã‚“ã®å‡ºå¼µæ‰€ ã¯ã¦ãªãƒ–ãƒã‚°ç·¨
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tamadon3776 2013/04/30
JAVA

é–‹ç™º

Webé–‹ç™º
ãƒªãƒ³ã‚¯
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tamadon3776 2012/09/25
JAVA

æ¼”ç®—
ãƒªãƒ³ã‚¯
ã€ŒGMTæ™‚é–“ã¨JST-9æ™‚é–“ã«ã¤ã„ã¦ã€ï¼ˆ1ï¼‰ Java Solution ï¼ ï¼ IT
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tamadon3776 2012/06/28
JAVA
ãƒªãƒ³ã‚¯
StringUtils.isEmpty()ã¨StringUtils.isBlank()ã®é•ã„ - å‰äººæœªè¸ã®é ˜åŸŸã¸ Androidã‚¢ãƒ—ãƒªé–‹ç™ºç·¨
isEmptyã¨isBlankã®é•ã„ã¯ç©ºç™½ã‚’è€ƒæ…®ã™ã‚‹ã‹ã©ã†ã‹ System.out.println("isBlank(null):" + StringUtils.isBlank(null)); System.out.println("isBlank(\"\"):" + StringUtils.isBlank("")); System.out.println("isBlank(\" \"):" + StringUtils.isBlank(" ")); System.out.println("isBlank(\"ã€€\"):" + StringUtils.isBlank("ã€€"));//å…¨è§’æ–‡å—ã®ç©ºç™½ System.out.println("isEmpty(null):" + StringUtils.isEmpty(null)); System.out.println("isEmpty(\"\"
tamadon3776 2012/06/11
Java
ãƒªãƒ³ã‚¯
NetBeans Profilerã«ã‚ˆã‚‹Tomcatã®ãƒªãƒ¢ãƒ¼ãƒˆãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒªãƒ³ã‚°
ç›®æ¬¡ ã¯ã˜ã‚ã« Eclipse TPTPã˜ã‚ƒã ã‚ãªã®ï¼Ÿ æ¸¬å®šç’°å¢ƒ ã‚µãƒ¼ãƒã®ã‚»ãƒƒãƒˆã‚¢ãƒƒãƒ— ã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆã®ã‚»ãƒƒãƒˆã‚¢ãƒƒãƒ— ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹åˆ†æž ãƒ¡ãƒ¢ãƒªåˆ†æž ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒ©ã®ã‚¨ãƒ©ãƒ¼å›žé¿ ã¯ã˜ã‚ã« NetBean 6.0ã«ä»˜å±žã™ã‚‹ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒ©(NetBeans Profiler)ã‚’ä½¿ã£ã¦ã€ãƒªãƒ¢ãƒ¼ãƒˆã§å‹•ä½œã™ã‚‹ Tomcat ã‚’ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒªãƒ³ã‚°ã™ã‚‹æ–¹æ³•ã‚’ç´¹ä»‹ã—ã¾ã™ã€‚NetBeansã«ã¤ã„ã¦ã¯ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒ©æ©Ÿèƒ½ã ã‘ã‚’åˆ©ç”¨ã™ã‚‹ãŸã‚ã€NetBeansã«ã‚ˆã‚‹é–‹ç™ºã¯å‰æã¨ã—ã¾ã›ã‚“ï¼ˆã‚€ã—ã‚Eclipseã«ã‚ˆã‚‹é–‹ç™ºã‚’å‰æã¨ã—ã¦ã„ã¾ã™ï¼‰ã€‚ ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒ«ã®ã‚¿ãƒ¼ã‚²ãƒƒãƒˆã‚’ Tomcat ã¨ã—ã¦ã„ã¾ã™ãŒã€Tomcatã«é™ã‚‰ãšä»»æ„ã®Javaã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã®ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒªãƒ³ã‚°ãŒå¯èƒ½ã§ã™ã€‚Linux + Tomcat ã®çµ„ã¿åˆã‚ã›ã¯ã‚ˆãã‚ã‚‹æ§‹æˆã§ã™ã®ã§ã€ã“ã®æ§‹æˆã‚’ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒªãƒ³ã‚°ã®ã‚¿ãƒ¼ã‚²ãƒƒãƒˆã¨ã—ã¾ã™ã€‚ NetBeans Profilerã«
tamadon3776 2012/05/18
Tomcat

JAVA

ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹
ãƒªãƒ³ã‚¯
POIã‚’ä½¿ç”¨ã—ã¦Javaã‹ã‚‰Excelãƒ‡ãƒ¼ã‚¿ã‚’èªã¿è¾¼ã‚€
ãƒ‡ãƒ¼ã‚¿å…¥åŠ›ã‚’è¡Œã†ã«ã¯ã€Webãƒ–ãƒ©ã‚¦ã‚¶ã‚„å°‚ç”¨ã®GUIç”»é¢ã‚’ä½¿ç”¨ã™ã‚‹ã“ã¨ãŒä¸€èˆ¬çš„ã§ã™ãŒã€ç”¨é€”ã«ã‚ˆã£ã¦ã¯ã€Microsoft Excelã§ä½œæˆã—ãŸãƒ•ã‚¡ã‚¤ãƒ«ã‹ã‚‰ãƒ‡ãƒ¼ã‚¿ã®èªã¿è¾¼ã¿ã‚’æ±‚ã‚ã‚‰ã‚Œã‚‹ã“ã¨ãŒã‚ã‚Šã¾ã™ã€‚ãã“ã§ã€æœ¬ç¨¿ã§ã¯ã€ŒPOIã€ã‚’ä½¿ç”¨ã—ã¦ã€Excelãƒ•ã‚¡ã‚¤ãƒ«ã‚’èªã¿è¾¼ã‚€æ–¹æ³•ã‚’ç´¹ä»‹ã—ã¾ã™ã€‚ãªãŠã€POIã®åŸºæœ¬ã«ã¤ã„ã¦ã¯ã€ã€ŒPOIã‚’ä½¿ç”¨ã—ã¦Javaã‹ã‚‰Excelå‡ºåŠ›ã‚’è¡Œã†ã€ã‚’ã”è¦§ãã ã•ã„ã€‚ ä»Šå›žã¯ã€Excelãƒ•ã‚¡ã‚¤ãƒ«ã‚’èªã¿è¾¼ã¿åˆè¨ˆå€¤ã‚’å‡ºåŠ›ã™ã‚‹ã¨ã„ã†ã‚µãƒ³ãƒ—ãƒ«ã‚’å®Ÿè¡Œã—ã¾ã™ã€‚ package to.msn.wings; import java.io.FileInputStream; import java.text.SimpleDateFormat; import java.util.Date; import org.apache.poi.hssf.usermodel.*; import org.apache
tamadon3776 2012/04/27
JAVA

POI
ãƒªãƒ³ã‚¯
Javaãƒ¡ãƒ¢ãƒªã€GCãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã¨ãã‚Œã«ã¾ã¤ã‚ã‚‹ãƒˆãƒ©ãƒ–ãƒ«å¯¾å¿œæ‰‹é †ã¾ã¨ã‚ - æ—¥è¨˜ã®ã‚ˆã†ãªä½•ã‹
GCå‘¨ã‚Šã§ãƒˆãƒ©ãƒ–ãƒ«ã‚·ãƒ¥ãƒ¼ãƒ†ã‚£ãƒ³ã‚°ã—ãŸéš›ã®çµŒé¨“ã‚„ã€Webç‰ã§èª¿ã¹ãŸã“ã¨ã‚’ã¾ã¨ã‚ã¦ã¿ã‚‹ã€‚ å‰æ ãƒ»JVMã¯ã€Sun Javaã‚’æƒ³å®šã€‚(ä»–ã¯ä½¿ã£ãŸã“ã¨ãªã„ã§ã™ã€‚ã€‚ã€‚) ãƒ»Sun Java 1.5-1.6ã‚’æƒ³å®šã€‚ ç›®æ¨™ ãƒžã‚¤ãƒŠãƒ¼GCã€Full GCãã‚Œãžã‚ŒãŒé »ç™ºã™ã‚‹ã“ã¨ãªãã€ã‹ã¤ãã‚Œãžã‚Œã®å®Ÿè¡Œæ™‚é–“ã‚’1ç§’æœªæº€ã«æŠ‘ãˆã‚‹ã“ã¨ã€‚ ãƒžã‚¤ãƒŠãƒ¼GCã¯1ç§’æœªæº€ã©ã“ã‚ã§ã¯ãªãã€ã‚‚ã£ã¨çŸããªã‚‹ã¹ãã€‚ã©ã‚Œãã‚‰ã„ãŒç†æƒ³ã‹ã¯ï¼Ÿ(0.1ç§’æœªæº€ãã‚‰ã„ã‚’ç›®æŒ‡ã—ãŸã„ï¼Ÿ) é€£ç¶šã—ãŸè² è·çŠ¶æ…‹(æƒ³å®šã•ã‚Œã‚‹ãƒ”ãƒ¼ã‚¯ã‚¢ã‚¯ã‚»ã‚¹)ã§ã‚‚OutOfMemoryErrorãŒç™ºç”Ÿã—ãªã„ã“ã¨ã€‚ ç†æƒ³çš„ãªçŠ¶æ…‹ã¯ã€ä¸Šè¨˜ã«åŠ ãˆã¦ã€Full GCã®ç™ºç”ŸãŒä½Žé »åº¦ã§ã‚ã‚‹ã“ã¨ã€‚ å…·ä½“çš„ã«ã¯ã€ã§ãã‚‹ã ã‘ãƒžã‚¤ãƒŠãƒ¼GCã§çŸå‘½ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆ(1å›žä½¿ã£ãŸã‚‰ã‚‚ã†ä½¿ã‚ãªã„ã‚ˆã†ãªã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã€‚é€†ã«ã‚»ãƒƒã‚·ãƒ§ãƒ³ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆç‰ã¯é•·å‘½ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã¨ãªã‚‹)ã‚’ç ´æ£„ã•ã›ã¦ã€çŸå‘½ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆãŒã€Tenu
tamadon3776 2012/04/20
JAVA

ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°

ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°
ãƒªãƒ³ã‚¯
http://msugai.fc2web.com/java/perform/garbage.html
tamadon3776 2012/04/20
JAVA

ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°
ãƒªãƒ³ã‚¯
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