import java.util.ArrayList; import java.util.Arrays; import java.util.HashSet; import java.util.Iterator; import java.util.List; import java.util.Set;
public class Test{ private static String[] s = new String[]{"a","b","a"}; private static int l = s.length; private static Set<String> set = new HashSet<String>(); public static void main(String[] args) { List<String> source = Arrays.asList(s); List<String> target = new ArrayList<String>(); sort(source,target); Iterator<String> it = set.iterator(); while(it.hasNext()){ System.out.println(it.next()); } }
private static void sort(List<String> source, List<String> target) { if(target.size() == l){ set.add(target.toString().replaceAll(",", "").replace("[", "").replace("]", "").replace(" ", "")); } for(int i=0;i<source.size();i++){ List<String> targetList = new ArrayList<String>(target); targetList.add(source.get(i)); List<String> resourceList = new ArrayList<String>(source); resourceList.remove(i); sort(resourceList,targetList); } } }
转载于:https://www.cnblogs.com/iamconan/p/7383613.html
