我尝试做经典问题来实现一个算法来打印n对括号的所有有效组合。我找到了这个程序(完美运行):publicstaticvoidaddParen(ArrayListlist,intleftRem,intrightRem,char[]str,intcount){if(leftRem0){//tryaleftparen,iftherearesomeavailablestr[count]='(';addParen(list,leftRem-1,rightRem,str,count+1);}if(rightRem>leftRem){//tryarightparen,ifthere’samatchin