очень нужно написать программу на java

Uses crt;
var n,i,j,l,sum,min:integer;
a:array[1..20,1..20]of integer;
begin
clrscr;
write('n=');
readln(n);
randomize;
Writeln('Ishodnaja matrica:');
for i:=1 to n do begin
for j:=1 to n do begin
a[i,j]:=random(10);
write(a[i,j]:3);
end;
writeln;
end;
For l:=1 to 2*n-1 do
begin
sum:=0;
if l<=n then
begin
for i:=1 to l do
for j:=1 to l do
if j=l-i+1 then sum:=sum+a[i,j];
if sum<min then min:=sum;
end
else if l>n then
begin
for i:=l-n+1 to n do
for j:=l-n+1 to n do
if j=l-i+1 then sum:=sum+a[i,j];
if sum<min then min:=sum;
end;
writeln('Summa diagonali ',l,' = ',sum);
end;
writeln;
readln
end.