java - after => Null Pointer -

java - after => Null Pointer -

i got code, , trying compare timestamp array:

timestamp oldesttstamp = timestamp[0]; boolean found = false; int temp = 0; (int j = 1; j<timestamp.length; j++){ if(oldesttstamp == null && timestamp[j] == null){} else if(oldesttstamp.after(timestamp[j])){ oldesttstamp = timestamp[j]; //retrieve oldest timestamp index in array found = true; temp = j; }

this how assign timestamp:

timestamp[index] = new timestamp(system.currenttimemillis());

your if status written in unusual way, , checks if both timestamps null. mean write

if (oldesttstamp != null && timestamp[j] != null && oldesttstamp.after(timestamp[j])) { ...

this way after() method called if both oldesttstamp , timestamp[j] non-null.

java timestamp