Java数组排序，比较大小

public class AvgTest {
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
double[] a=new double[3];
for(int i=0;i<a.length;i++){
System.out.println("请输入第"+(i+1)+"个数:");
a[i]=Double.parseDouble(sc.next());
}
double max=0.0d,min=0.0d;
Arrays.sort(a);
max=a[a.length-1];
min=a[0];
System.out.println("最大值是:"+max);
System.out.println("最小值是："+min);
}
}