java 控制台输入数字..并排序

       public static void main(String[] args) {

                    

                     Scanner scanner=new Scanner(System.in);   

                     System.out.println(" 请输入数字 , 用逗号分开即可： ");

               String num=scanner.next();        

               String st[]= num.split(",");

               for(int i=st.length-1;i>=1;i--){

                   for(int j=0;j<=i-1;j++) {

                       if(st[j].compareTo(st[j+1])>0) {

                            String temp=null;

                           temp=st[j];

                           st[j]=st[j+1];

                           st[j+1]=temp;

                       }

                   }

               }    

               for(String a:st){

                      System.out.println(" 排序后： ");

                    System.out.print(a+" ");

               }

              }