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import java.util.*;

public class lISTSS {


public static <t> void getCombination(List<t>... lists) {
if (lists == null) return;
getCombinations(new ArrayList<t>(), 0, lists);
}

private static <t> void getCombinations(List<t> soFar, int i, List<t>... lists) {

if (i == lists.length) { //no more lists left:

System.out.println(soFar);

} else {

for (T t : lists[i]) {

soFar.add(t); //"guess" item
getCombinations(soFar, i + 1, lists); //recurse on rest of lists
soFar.remove(soFar.size() - 1); //cleanup
}
}
}

public static void main(String args[]) {

List<string> A = Arrays.asList("one","two","three");
List<string> B = Arrays.asList("four","five");

getCombination(A,B);
}
}

What I have tried:

This is the current output:

[one, four]
[one, five]
[two, four]
[two, five]
[three, four]
[three, five]
I have the above code that gets all combinations of two lists, and I got the output, but I want to remove the combinations [one, five] and [two, four]. I've tried the following without avail.

if(soFar.get(i).equals("one, five")) {
soFar.remove("one, five");
}
Posted
Updated 4-Apr-16 19:55pm

1 solution

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Solution 1

You need to use Iterator and call remove() on iterator instead of using for loop.

Iterator (Java Platform SE 7 )[^]
   

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