java递归实现全排列

import java.util.ArrayList; import java.util.Arrays; import java.util.List;

public class Test{  private static String[] s = new String[]{"1","2","3","4"};  private static int l = s.length;  public static void main(String[] args) {   List<String> source = Arrays.asList(s);   List<String> target = new ArrayList<String>();   sort(source,target);  }

 private static void sort(List<String> source, List<String> target) {   if(target.size() == l){    for(int i=0;i<target.size();i++){     System.out.print(target.get(i));    }    System.out.println();   }   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/7383614.html

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