public class DescartesProduct { /** * * @Date: 2013-7-1上午10:14:14 * @Description: 笛卡尔积 * @param words * @return */ public static String[] descartes(String[][]words){ String[]arr = words[0]; for (int i = 1; i < words.length; i++) { String[]word = words[i]; List<String> set = new ArrayList<String>(); for (String s : word) { for (String u : arr) { String t=u+" "+s; set.add(t); } } arr=set.toArray(arr); } return arr; } public static void main(String[] args) { String[][] a = {{"1","2","3"},{"4","5","6"},{"7","8","9"}}; String[] b = descartes(a); for (String s : b) { System.out.println(s); } } }
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