Rectangle Area

public class Solution {
public int computeArea(int A, int B, int C, int D, int E, int F, int G, int H) {
int area = (D-B)*(C-A)+(H-F)*(G-E);
if(C<=E||D<=F||A>=G||B>=H)
return area;
int top = Math.min(D,H);
int bt = Math.max(B,F);
int left = Math.max(A,E);
int right = Math.min(C,G);
return area - (top-bt)*(right-left);
}
}