Convert Long to Float and Integer

Question

I have an object that has some cpu stats. The problem is that those that's are in type long (i think)

How can I convert this to usefull values like float and int?

I tried to cast it but I got

java.lang.ClassCastException: java.lang.Long cannot be cast to java.lang.Float

float value = (float) Docker.getStatistics("ENVX").getCpuStats().get("system_cpu_usage");

Why do you want to convert a `long` (or a `Long`) to a `float`? You'd lose precision. — Eran, Jan 03 '18 at 14:52
longs are certainly "usefull values". In fact more useful then float in most cases — OH GOD SPIDERS, Jan 03 '18 at 14:53
Possible duplicate of [Get Docker Container CPU Usage as Percentage](https://stackoverflow.com/questions/30271942/get-docker-container-cpu-usage-as-percentage) — OH GOD SPIDERS, Jan 03 '18 at 14:56
I mean I just wanted to show the actual data. This is an API and the values are in long. I want to show percentages of the cpu — sadas, Jan 03 '18 at 14:57

score 3 · Answer 1 · answered Jan 03 '18 at 14:53

3

I don't really understand why would you want to convert a 64-bit value to a 32-bit, risking to lose precision, but you can try with:

Long cpu = Docker.getStatistics("ENVX").getCpuStats().get("system_cpu_usage");
Float f = Float.valueOf(cpu.toString());

answered Jan 03 '18 at 14:53

Konstantin Yovkov

I mean. I think this should be the cpu percentage. I can't really use a long value. I need something like 0-100%. **Maybe I should convert to double?** – sadas Jan 03 '18 at 14:54
Then you don't need any `float`s, nor `double`s, but simple maths. :) – Konstantin Yovkov Jan 03 '18 at 14:54
Maybe I am an idiot then. I thought this was supposed to give the raw values already. – sadas Jan 03 '18 at 14:56

1 Answers1