weird recursion issue

gistfile1.txt

//weird recursion gen permutation paranthesis
package com.internet;

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

public class PintAllPermutationOfParanthesis {
    public static void printAllParanthesis(List<String> finalOp, int open, int close, int n){
        if(close==n){
            //for(String ls:finalOp) {
                finalOp.stream().forEach(System.out::print);
                //finalOp.clear();
                System.out.println();
            //}
        return;
        }
        else {
            if (open > close) {
                finalOp.add("}");
                printAllParanthesis(finalOp, open, close+1, n);
            }
            if (open < n) {
                finalOp.add("{");
                printAllParanthesis(finalOp, open+1, close, n);

            }
        }
    }
    public static void main(String[] args){
        PintAllPermutationOfParanthesis printPara=new PintAllPermutationOfParanthesis();
        List<String> str =new ArrayList<>();
        printAllParanthesis(str,0,0,3);
    }
}