Leetcode @Rectangle Area 223

Find the left down corner and right up corner of shared area .



public class Solution {
    public int computeArea(int A, int B, int C, int D, int E, int F, int G, int H) {
        int ac = (D-B)*(C-A);
        int eg = (H-F)*(G-E);
        int share1x = Math.max(A, E);
        int share1y= Math.max(B, F);
        int share2x = Math.min(C, G);
        int share2y= Math.min(D, H);
     
        return ac+eg-(share2y-share1y)*(share2x-share1x);
    }
}