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如何使用TimeUnit枚举将纳秒转换为秒？
如何将值从纳秒转换为秒？ 这是代码段： import java.io.*; import java.util.concurrent.*; .. class Stamper { public static void main (String[] args) { long start = System.nanoTime(); //some try with nested loops long end = System.nanoTime(); long elapsedTime = end - start; System.out.println("elapsed: " + elapsedTime + "nano seconds\n"); //convert to seconds TimeUnit seconds = new …