JAVA開発メモ
Collections
 

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import java.util.ArrayList; import java.util.Collection; import java.util.Collections; import java.util.List; public class CollectionsSample { public static void main(String[] args) { List list = new ArrayList(); Collection collection = list; list.add(new Integer(5)); list.add(new Integer(2)); list.add(new Integer(6)); list.add(new Integer(1)); list.add(new Integer(4)); list.add(new Integer(3)); Collections.sort(list); System.out.println(list); int index = Collections.binarySearch(list, new Integer(2)); index = Collections.binarySearch(list, new Integer(4)); index = Collections.binarySearch(list, new Integer(5)); Collections.shuffle(list); System.out.println(list); Collections.sort(list); Collections.reverse(list); System.out.println(list); Collections.rotate(list, 3); System.out.println(list); Collections.sort(list); Collections.swap(list, 0, 5); Collections.swap(list, 1, 4); System.out.println(list); } } [1, 2, 3, 4, 5, 6] [6, 2, 3, 5, 1, 4] [6, 5, 4, 3, 2, 1] [3, 2, 1, 6, 5, 4] [6, 5, 3, 4, 2, 1]

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Last-modified: Tue, 15 Feb 2005 14:07:52 UTC (6982d)
Link: (5667d)

Modified by MT22(Moriwaki Takashi)

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