//1.将字符串通过正则表达式切割成字符串数组
String ss = "91 27 46 38 50";
String [] arr = ss.split(" ");
//2.将字符串转换成数字Integer.parseInt(arr[i])并将其存储在一个等长度的int数组中
int [] arr1 = new int[arr.length];
for(int i =0; i < arr1.length ; i++) {
arr1[i] = Integer.parseInt(arr[i]);
}
//3.排序
Arrays.sort(arr1);
//4.将排序后的结果遍历并拼接成一个字符串
/*String str = ""; //这里用String 会每次都产生String对象 会产生很多垃圾，所以用Stringbuilder
for(int i =0;i<arr1.length;i++) {
if(i == arr1.length-1) {
str += arr1[i];
}else {
str += arr1[i] +",";
}
}
System.out.println(str);*/
StringBuilder st = new StringBuilder();
for(int i =0;i<arr1.length;i++) {
if(i == arr1.length-1) {
st.append(arr1[i]);
}else {
st.append(arr1[i] + ",");
}
}
System.out.println(st);