java Arrays.sort 2d array

使用

Overloaded Arrays＃Sort（T [] a，Comparator c）

Comparator

double[][] array= {{1, 5},{13, 1.55},{12, 100.6},{12.1, .85} };java.util.Arrays.sort(array, new java.util.Comparator<double[]>() {    public int compare(double[] a, double[] b) {        return Double.compare(a[0], b[0]);    }});