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JavaåŸºç¤Žæ–‡æ³•æœ€é€Ÿãƒžã‚¹ã‚¿ãƒ¼ - ã„ã‚ã„ã‚è§£æžæ—¥è¨˜
Javaã®æ–‡æ³•ä¸€è¦§ã§ã™ã€‚ä»–ã®è¨€èªžã‚’ã‚ã‚‹ç¨‹åº¦çŸ¥ã£ã¦ã„ã‚‹äººã¯ã“ã‚Œã‚’èªã‚ã°Javaã®åŸºç¤Žã‚’ãƒžã‚¹ã‚¿ãƒ¼ã—ã¦Javaã‚’æ›¸ãã“ã¨ãŒã§ãã‚‹ã‚ˆã†ã«ãªã£ã¦ã„ã¾ã™ã€‚ç°¡æ˜“ãƒªãƒ•ã‚¡ãƒ¬ãƒ³ã‚¹ã¨ã—ã¦ã‚‚åˆ©ç”¨ã§ãã‚‹ã¨æ€ã„ã¾ã™ã®ã§ã€ã“ã‚Œã¯è¶³ã‚Šãªã„ã¨æ€ã†ã‚‚ã®ãŒã‚ã‚Œã°æ•™ãˆã¦ãã ã•ã„ã€‚ 1. åŸºç¤Ž classã®ä½œæˆ ãƒ—ãƒã‚°ãƒ©ãƒ ã¯classã«è¨˜è¿°ã—ã¾ã™ã€‚ãŸã¨ãˆã°Sampleã¨ã„ã†åå‰ã®classã‚’ä½œã‚‹å ´åˆã€Sample.javaãƒ•ã‚¡ã‚¤ãƒ«å†…ã«æ¬¡ã®ã‚ˆã†ã«æ›¸ãã¾ã™ã€‚ public class Sample { } mainãƒ¡ã‚½ãƒƒãƒ‰ã®ä½œæˆ ãƒ—ãƒã‚°ãƒ©ãƒ ã¯classå†…ã®mainãƒ¡ã‚½ãƒƒãƒ‰ã®å…ˆé ã‹ã‚‰å®Ÿè¡Œã•ã‚Œã¾ã™ã€‚mainãƒ¡ã‚½ãƒƒãƒ‰ã¯æ¬¡ã®ã‚ˆã†ã«æ›¸ãã¾ã™ã€‚ public class Sample { public static void main( String[] args ) { // å‡¦ç†ã‚’æ›¸ã } } System.out.printlnãƒ¡ã‚½ãƒƒãƒ‰ æ–‡
suireN 2010/02/11
java

programming

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Javaç·ç§°åž‹ãƒ¡ãƒ¢(Hishidama's Java Generics Memo)
ãƒ¡ã‚½ãƒƒãƒ‰ã®ç·ç§°åž‹ ãƒ¡ã‚½ãƒƒãƒ‰ã®ã¿ã«ç·ç§°åž‹ã‚’é©ç”¨ã—ãŸå®šç¾©ã‚’è¡Œã†ã“ã¨ã‚‚å‡ºæ¥ã‚‹ã€‚[2007-06-12] æˆ»ã‚Šå€¤ã®åž‹ã®ç›´å‰ã«ã€Œ<ä»®åž‹å¼•æ•°, ä»®åž‹å¼•æ•°â€¦>ã€ã‚’ç½®ãã ã‘ã€‚å¾Œã¯ã‚¯ãƒ©ã‚¹ã®å ´åˆã¨åŒæ§˜ã€‚ public static <T> T notNull(T arg1, T arg2) { T ret; if (arg1 != null) { ret = arg1; } else { ret = arg2; } return ret; } ã“ã®ãƒ¡ã‚½ãƒƒãƒ‰ã‚’å‘¼ã³å‡ºã™å´ã¯ã€ã‚¯ãƒ©ã‚¹ã®å ´åˆã¨ã¯ç•°ãªã‚Šã€æ˜Žç¤ºçš„ã«åž‹å¼•æ•°ã‚’æŒ‡å®šã™ã‚‹å¿…è¦ã¯ç„¡ã„ã€‚ æŒ‡å®šã—ãŸå¼•æ•°ã®å€¤ã«å¿œã˜ã¦ã€è‡ªå‹•çš„ã«åž‹ãŒåˆ¤æ–ã•ã‚Œã‚‹ã€‚ String s = notNull("abc", "def"); //åž‹å¼•æ•°ã¯String Long l = notNull(new Long(1), new Long(2)); //åž‹å¼•æ•°ã¯Long int i = notNu
suireN 2009/11/05
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suireN 2009/10/30
java

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suireN 2009/10/27
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JTextFieldï¼ˆSwingï¼‰ JTextFieldã¯ã€ä¸€è¡Œã®ãƒ†ã‚ã‚¹ãƒˆï¼ˆæ–‡å—åˆ—ï¼‰ã®ç·¨é›†ã‚’è¡Œã†ã‚³ãƒ³ãƒãƒ¼ãƒãƒ³ãƒˆã€‚ ï¼ˆå›ºå®šã§è¡¨ç¤ºã™ã‚‹ã ã‘ãªã‚‰JLabelã€è¤‡æ•°è¡Œã®ç·¨é›†ã‚’è¡Œã†ãªã‚‰JTextAreaã‚„JTextPaneï¼‰ æ¨ªä½ç½®æŒ‡å®š JTextFieldã¯ã€ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆã§ã¯å·¦æƒãˆã€‚ä¸å¤®æƒãˆã‚„å³æƒãˆã«ã™ã‚‹ã«ã¯ä»¥ä¸‹ã®ã‚ˆã†ã«ã™ã‚‹ã€‚ import javax.swing.JTextField; JTextField tf = new JTextField(); tf.setHorizontalAlignment(JTextField.RIGHT); UNDOãƒ»REDO JTextFieldã®ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆã§ã¯ã€ã‚¢ã‚¦ãƒ³ãƒ‰ã‚¥ãƒ¼ãƒ»ãƒªãƒ‰ã‚¥ãƒ¼ï¼ˆCtrl+Zã‚„Ctrl+Yã«ã‚ˆã‚‹å…¥åŠ›ã®ã‚„ã‚Šç›´ã—ï¼‰æ©Ÿèƒ½ã¯å‚™ã‚ã£ã¦ã„ãªã„ã€‚ ã“ã‚Œã¯UndoManagerã‚’ç™»éŒ²ã™ã‚Œã°å‡ºæ¥ã‚‹ã‚ˆã†ã«ãªã‚‹ã€‚ UndoManageræ©Ÿèƒ½ã‚’å‚™ãˆãŸJTextF
suireN 2009/10/23
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suireN 2009/10/23
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suireN 2009/10/23
swing

java

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suireN 2009/10/15
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Process ãƒ—ãƒã‚»ã‚¹çµ‚äº†å¾…ã¡ ãƒ‡ãƒ¼ã‚¿èªã¿è¾¼ã¿ å¾Œã‹ã‚‰èªã‚€ã¨NG å…ˆã«èªã‚“ã§ã‚‚NG å…¨ãƒ‡ãƒ¼ã‚¿å»ƒæ£„ ã‚¹ãƒ¬ãƒƒãƒ‰åŒ– [/2015-04-18] ãƒªãƒ€ã‚¤ãƒ¬ã‚¯ã‚·ãƒ§ãƒ³ ã‚¯ãƒãƒ¼ã‚º [2010-12-26] ãƒ—ãƒã‚»ã‚¹å¼·åˆ¶çµ‚äº†ï¼ˆã‚¿ã‚¤ãƒ ã‚¢ã‚¦ãƒˆï¼‰ Timerä½¿ç”¨ [/2014-03-19] exitValueåˆ©ç”¨ [/2014-03-19] isAliveåˆ©ç”¨ [2014-03-19] Futureåˆ©ç”¨ [2014-03-18] ã‚¿ã‚¤ãƒ ã‚¢ã‚¦ãƒˆä»˜ãwaitFor [2014-03-19] Runtime JDK1.4ã¾ã§ã¯ã€å¤–éƒ¨ãƒ—ãƒã‚»ã‚¹ã®èµ·å‹•ã«Runtimeã‚¯ãƒ©ã‚¹ã‚’ä½¿ã†ã€‚ JDK1.5ä»¥é™ã§ã‚‚ä½¿ãˆã‚‹ãŒã€JDK1.5ä»¥é™ã§ã¯Runtimeã®å†…éƒ¨ã§ProcessBuilderã‚’ä½¿ã£ã¦ã„ã‚‹ã®ã§ã€ç´ ç›´ã«ProcessBuilderã‚’ä½¿ã†æ–¹ãŒã‚ˆã„ã€‚ ã€Œjava -versionã€ã‚’å®Ÿè¡Œã™ã‚‹ä¾‹ Runtime r = Ru
suireN 2009/10/07
javaã‹ã‚‰perlèµ·å‹•

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Java/æ–‡æ³•/ArrayList - ãƒ”ãƒŽã‚ãƒ² IT Wiki
suireN 2009/10/07
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