elapsed.java

java2参考大全上的例子的源码和自己的理解.

package 使用currenttimemilis;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

// Timing program execution.

class Elapsed {
  public static void main(String args[]) {
    long start, end;

    System.out.println("Timing a for loop from 0 to 1,000,000");

    // time a for loop from 0 to 1,000,000
    start = System.currentTimeMillis(); // get starting time
    for (int i = 0; i < 1000000; i++) {
      ;
    }
    end = System.currentTimeMillis(); // get ending time
    System.out.println("Elapsed time: " + (end - start));
  }
}