Measuring Time 🕰

Many applications require a very precise time measurement. For this purpose, Java provides static methods in System class. 🔆

1️⃣ - currentTimeMillis(): Returns current time in MilliSeconds since Epoch Time, in Long.
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long startTime = System.currentTimeMillis();
long estimatedTime = System.currentTimeMillis() - startTime;

2️⃣ - nanoTime(): Returns the current value of the most precise available system timer, in NanoSeconds, in long.

nanoTime() is meant for measuring relative time interval instead of providing absolute timing.

long startTime = System.nanoTime();
long estimatedTime = System.nanoTime() - startTime;

#java #time
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