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処理時間の計測

Last updated at Posted at 2014-06-22

javaで処理時間を計測するにはSystemクラスのcurrentTimeMillisメソッドを使うのが一番簡単みたい?currentTimeMillisは現在の時間を所得するメソッドなので、計測したい処理の前後の時間を計測して、引き算で処理時間が求まるっていう感じですかね・・

time.java
long start = System.currentTimeMillis();

//計測したい処理を記述

long end = System.currentTimeMillis();
System.out.println((end - start)  + "ms");
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