long start,end;
start = System.currentTimeMillis();
for (int i = 0; i < 2000000000; i++) {}
end = System.currentTimeMillis();
System.out.println("Run Time:" + (end - start) + "(ms)");
long start,end;
start = System.currentTimeMillis();
for (int i = 0; i < 2000000000; i++) {}
end = System.currentTimeMillis();
System.out.println("Run Time:" + (end - start) + "(ms)");