标签:blog tail system str list import set input out
import java.util.ArrayList;
import java.util.List;
/**
* 多个数组间元素排列组合问题求解
* 非递归计算所有组合
* <a>https://blog.csdn.net/tyhj_sf/article/details/53893125</a>
*/
public class CalculateCombinationTest {
public static void calculateCombination(List<List<String>> inputList) {
List<Integer> combination = new ArrayList<Integer>();
int n=inputList.size();
for (int i = 0; i < n; i++) {
combination.add(0);
}
int i=0;
boolean isContinue=false;
do{
//打印一次循环生成的组合
for (int j = 0; j < n; j++) {
System.out.print(inputList.get(j).get(combination.get(j))+", ");
}
System.out.println();
i++;
combination.set(n-1, i);
for (int j = n-1; j >= 0; j--) {
if (combination.get(j)>=inputList.get(j).size()) {
combination.set(j, 0);
i=0;
if (j-1>=0) {
combination.set(j-1, combination.get(j-1)+1);
}
}
}
isContinue=false;
for (Integer integer : combination) {
if (integer != 0) {
isContinue=true;
}
}
}while (isContinue);
}
public static void main(String[] args) {
List<String> list1 = new ArrayList<>();
list1.add("0");
list1.add("1");
list1.add("2");
List<String> list2 = new ArrayList<>();
list2.add("a");
list2.add("b");
list2.add("c");
List<String> list3 = new ArrayList<>();
list3.add("@");
list3.add("#");
list3.add("$");
List<List<String>> allList = new ArrayList<>();
allList.add(list1);
allList.add(list2);
allList.add(list3);
calculateCombination(allList);
}
}
标签:blog tail system str list import set input out
原文地址:https://www.cnblogs.com/fly-book/p/14047616.html