Date.getTime（）给出2000年1月1日的时间

Question

I have observed this unusual behavior in a few laptops. I had some issue running in the application we developed. On debugging it we found that new Date.getTime() is pointing to an old date . After that we tried to run a small program on those machines. The following is the code we used.

import java.util.Date;
import java.util.concurrent.ConcurrentHashMap;

public class Test {

    public static void main(String... args)  {
        System.out.println(new Date().getTime());
        ConcurrentHashMap chm = new ConcurrentHashMap();

        for (int i = 0; i < 100000; i++) {
            chm.put(i, new Date().getTime());

                if (Long.parseLong(String.valueOf(chm.get(i))) < 1332334082344l) {
                    System.out
                            .println(Long.parseLong(String.valueOf(chm.get(i))));
                }



        }

        System.out.println("dONE "+chm.size()+" "+chm.get(1000));
    }
}

The output is something like "946684800617" if a few case. When we saw the date it points to Jan 1st 2000 and some milliseconds. This is not happening in all the laptops.

Wanted to know why this is happening so that we can work over it.

PS : We are using windows 7 (pro),Lenovo ThinkPad L420

Answer 1

This doesn't answer your question a such but your code is so complex it could have unintended consequences. Can you try running this which does the same thing?

public class Test {
    public static void main(String... args) {
        int length = 100000;
        System.out.println(System.currentTimeMillis());
        long[] times = new long[length];
        for (int i = 0; i < length; i++) {
            times[i] = System.currentTimeMillis();
            if (times[i] < 1332334082344L)
                System.out.println(times[i]);
        }
        System.out.println("Done " + times.length + " " + times[1000]);
    }
}