import java.util.*; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); while(sc.hasNext()){ String str=sc.nextLine(); char[] ch=str.toCharArray(); StringBuilder sb=new StringBuilder(); for(int i=0;i<ch.length>=0;i--) if(arr[i].length()>0) System.out.print(arr[i]+" "); } } } 这个可以适用于多个间隔符</ch.length>