http://www.bouncycastle.org/java.html: The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.5 to JDK 1.8. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.
  • The Legion of the Bouncy Castle Inc. 
package org.bouncycastle.tsp;

import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.tsp.Accuracy;

public class GenTimeAccuracy
{
    private Accuracy accuracy;

    public GenTimeAccuracy(Accuracy accuracy)
    {
        this.accuracy = accuracy;
    }
    
    public int getSeconds()
    {
        return getTimeComponent(accuracy.getSeconds());
    }

    public int getMillis()
    {
        return getTimeComponent(accuracy.getMillis());
    }

    public int getMicros()
    {
        return getTimeComponent(accuracy.getMicros());
    }

    private int getTimeComponent(
        ASN1Integer time)
    {
        if (time != null)
        {
            return time.getValue().intValue();
        }

        return 0;
    }
    
    public String toString()
    {                               // digits
        return getSeconds() + "." + format(getMillis()) + format(getMicros());
    }

    private String format(int v)
    {
        if (v < 10)
        {
            return "00" + v;
        }

        if (v < 100)
        {
            return "0" + v;
        }

        return Integer.toString(v);
    }
}