Arrays.sort(twoDim, new Comparator<int[]>() {
@Override
public int compare(int[] o1, int[] o2) {
return Integer.compare(o2[0], o1[0]);
}
});Arrays.sort(twoDim, new Comparator<int[]>() {
@Override
public int compare(int[] o1, int[] o2) {
return ((Integer) o2[0]).compareTo(o1[0]);
}
});import java.util.*;
public class Test {
public static void main(String args[]) {
int[][] twoDim = { {1, 2}, {3, 7}, {8, 9}, {4, 2}, {5, 3} };
Arrays.sort(twoDim, Comparator.comparingInt(a -> a[0])
.reversed());
System.out.println(Arrays.deepToString(twoDim));
}
}