这将达到目的。您可以将数字5更改为5以外的其他数字。1,2,3，..，6,8
public static void main(String[] args) { List<String> list = new linkedList<String>(); for(int i = 5; i > 0; i-- ){ wrapWithNumber(list, i); } for (String string : editListToBeInTriangleShape(list)) { System.out.println(string); };}private void wrapWithNumber(List<String> list, final int ba) { list.add(0, String.format("%d",ba)); for (int i = 1; i < list.size(); i++) { String newformat = "%1$d " + list.get(i) + " %1$d"; list.remove(list.get(i)); list.add(i,String.format(newformat, ba)); } String lastFormat = "%1$d"; for(int i = 0; i < 2 * list.size();i++){ lastFormat += " %1$d"; } if(list.size() != 1) { list.add(String.format(lastFormat, ba)); }}private List<String> editListToBeInTriangleShape(final List<String> list) { final List<String> returnList = new linkedList<String>(); for (int i = list.size(); i > 0; i--) { String s = list.get(list.size()-i); int possition = list.size()*2 + s.length()/2; returnList.add(String.format("%"+possition+"s", s)); } return returnList;}放出这个：
1 1 2 1 1 2 3 2 11 2 3 4 3 2 1 1 2 3 4 5 4 3 2 1 1 2 3 4 4 4 4 4 3 2 1 1 2 3 3 3 3 3 3 3 3 3 2 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
