// For complete examples and data files, please go to https://github.com/aspose-tasks/Aspose.Tasks-for-Java
// The path to the documents directory.
String dataDir = Utils.getDataDir(UpdatedTaskLinkDataToMpp.class);

long OneSec = 10000000;// microsecond * 10
long OneMin = 60 * OneSec;
long OneHour = 60 * OneMin;

Project project = new Project(dataDir + "Aspose\\SampleNewMSP.mpp");
Task task1 = project.getRootTask().getChildren().add("First task");

java.util.Calendar cal = java.util.Calendar.getInstance();
cal.set(2013, 12, 10, 8, 0, 0);
project.set(Prj.START_DATE, cal.getTime());
task1.set(Tsk.START, cal.getTime());
task1.set(Tsk.DURATION, project.getDuration(OneHour * 24, TimeUnitType.Hour));

Task summary = project.getRootTask().getChildren().add("Summary task");
summary.getChildren().add(task1);

project.getRootTask().getChildren().add(summary);

cal.setTime(task1.get(Tsk.START));
cal.add(java.util.Calendar.DATE, 10);
task1.set(Tsk.DEADLINE, cal.getTime());

task1.set(Tsk.NOTES_TEXT, "The first task.");
task1.set(Tsk.DURATION_FORMAT, TimeUnitType.DayEstimated);
task1.set(Tsk.CONSTRAINT_TYPE, ConstraintType.FinishNoLaterThan);

cal.setTime(task1.get(Tsk.DEADLINE));
cal.add(java.util.Calendar.DATE, -1);
task1.set(Tsk.CONSTRAINT_DATE, cal.getTime());

// Create 10 new tasks
for (int i = 0; i < 10; i++) {
    String taskName = "Task " + (i + 2);
    Task task = summary.getChildren().add(taskName);
    task.set(Tsk.START, task1.get(Tsk.START));
    long lDuration = (long) task1.get(Tsk.DURATION).toDouble();
    lDuration = (long) (lDuration + (OneHour * 8 * (i + 1)));
    task.set(Tsk.DURATION, project.getDuration(lDuration, TimeUnitType.Hour));
    task1.set(Tsk.DURATION_FORMAT, TimeUnitType.Day);

    cal.setTime(task1.get(Tsk.DEADLINE));
    cal.add(java.util.Calendar.DATE, 1 + i);
    task.set(Tsk.DEADLINE, cal.getTime());
    task.set(Tsk.FINISH,
            project.get(Prj.CALENDAR).getFinishDateByStartAndWork(task.get(Tsk.START), task.get(Tsk.DURATION)));
    summary.getChildren().add(task);
}

// Save the Project
project.save(dataDir + "Aspose\\WritingUpdatedTaskDataToMpp.mpp", SaveFileFormat.MPP);