对String s = "11.1,56.1,2.9,34.3,1.03,24.2" 不能使用jdk自带排序方法

public class Test {
public static void main(String[] args) {
sortStr("11.1,56.1,2.9,34.3,1.03,24.2");
}
private static void sortStr(String s) {

String str[] = s.split(",");
double d[] = new double[str.length];
try {
for (int i = 0; i < str.length; i++) {
d[i] = Double.valueOf(str[i]);
}

for (int i = 0; i < d.length - 1; i++) {
for (int j = 0; j < d.length - i - 1; j++) {
if (d[j] < d[j + 1]) {
double temp = d[j];
d[j] = d[j + 1];
d[j + 1] = temp;
}
}
}
System.out.println(d.toString());
} catch (Exception e) {
System.out.println(e);
}
}
}