Sleep in java

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Option 1:

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Thread.sleep(4000);
Thread.sleep(4000);
Thread.sleep(4000);

Option 2:

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import java.util.concurrent.TimeUnit
TimeUnit.SECONDS.sleep(2);
import java.util.concurrent.TimeUnit TimeUnit.SECONDS.sleep(2);
import java.util.concurrent.TimeUnit

TimeUnit.SECONDS.sleep(2);