windowstime.java

本次实验中用Java实现的Calendar具有跨平台运行能力

package edu.swjtu.sist.java.calendar;

/**
 * 该类通过本地方法private static native boolean setTime(int year, int month, int day, int hour, int min, int sec);
 * 来将应用程序的修改后的时间应用为真实的系统时间。
 * 
 * 需要使用JNI分别实现windows下的*.DLL，和linux下的*.SO
 * 
 * @author [e-mail]
 * @version 1.0
 */
public class WindowsTime
{

    public WindowsTime()
    {
    }
    
    public static boolean hasModified=false;
    
    private static native boolean setTime(int year, int month, int day, int hour, int min, int sec);

    public static void setLocalTime(int year, int month, int day, int hour, int min, int sec)
        throws TimeOutException
    {
        if(year < 1980)
            throw new TimeOutException("year");
        if((month < 0) | (month > 12))
            throw new TimeOutException("month");
        if((day < 1) | (day > 31))
            throw new TimeOutException("day");
        if((hour < 0) | (hour > 23))
            throw new TimeOutException("hour");
        if((min < 0) | (min > 59))
            throw new TimeOutException("minutes");
        if((sec < 0) | (sec > 59))
            throw new TimeOutException("seconds");
        if(!setTime(year, month, day, hour, min, sec))
            throw new TimeOutException("All");
        else
            return;
    }

    static 
    {
        System.loadLibrary("SetSysTime");
    }
}