scheduleitem.java

J2ME MIDP 2.0 无线设备编程的一些源码

//ScheduleItem.java 保存日程记录
package calendar;
import java.util.*;
import java.io.*;

public class ScheduleItem
{
    //定义日程类型
    public final static int PHONE =0;
    public final static int MEETING =1;
    public final static int TASK =2;
    public final static int EMAIL =3;
    public final static int NOTE =4;
    public final static int MISC =5;
    //定义类型名称
    protected final static String[ ] typeName={"Phone","Meeting","Task","Email","Note","Misc"};
    public int itemType; //日程类型
    public Date itemTime; //日程日期和时间
    public String itemName, itemMemo; //日程名称和说明
    //构造器
    public ScheduleItem()
    {
        itemType = MISC;
        itemTime = new Date(0);
        itemName = null;
        itemMemo = null;
    }
    //将数据转换为字节数组
    public byte[ ] getBytes()
    {//利用ByteArrayOutputStream 和 DataOutputStream 来完成这个操作
        ByteArrayOutputStream bdos = new ByteArrayOutputStream();
        DataOutputStream dos = new DataOutputStream( bdos );
        byte[ ] retV = null;
        try
        {
            dos.writeInt(itemType);
            dos.writeLong(itemTime.getTime());
            dos.writeUTF(itemName);
            dos.writeUTF(itemMemo);
            retV = bdos.toByteArray();
            dos.close();
            bdos.close();
        }
        catch(IOException e) { System.out.println(e.getMessage()); }
        finally
        {
            dos = null;
            bdos = null;
        }
        return retV;
    }
    //从字节数组中将数据读出，并转换为数据
    public boolean readBytes(byte[] src)
    {//ByteArrayInputStream 和 DataInputStream 来完成这个操作
        ByteArrayInputStream bdis = new ByteArrayInputStream(src);
        DataInputStream dis = new DataInputStream( bdis );
        boolean retV = false;
        try
        {
            itemType = dis.readInt();
            itemTime.setTime(dis.readLong());
            itemName = dis.readUTF();
            itemMemo = dis.readUTF();
            retV = true;
            dis.close();
            bdis.close();
        }
        catch(IOException e)
        { System.out.println(e.getMessage()); }
        finally
        {
            dis = null;
            bdis = null;
        }
        return retV;
    }
    //通过日程类型的值得到类型名称
    public static String getTypeName(int type)
    {
        return typeName[type];
    }
    //设置对象的值
    public void set(String name,int type,Date date,String memo)
    {
        itemName = name;
        itemType = type;
        itemMemo = memo;
        itemTime = date;
    }
    //检查年月日是否与参数中指定的日期相同
    public boolean isDateMatch(Calendar date)
    {
        Calendar cal = Calendar.getInstance();
        cal.setTime(itemTime);
        return (cal.get(Calendar.DAY_OF_MONTH) == date.get(Calendar.DAY_OF_MONTH)
                && cal.get(Calendar.MONTH) == date.get(Calendar.MONTH)
                && cal.get(Calendar.YEAR) == date.get(Calendar.YEAR));
            
    }
    //得到用1970/1/1日来表示的时间，这是为了能够让时间用于DateField对象
    public Date getTime()
    {
        Calendar cal = Calendar.getInstance();
        cal.setTime(itemTime);
        cal.set(Calendar.YEAR,1970);
        cal.set(Calendar.MONTH,Calendar.JANUARY);
        cal.set(Calendar.DAY_OF_MONTH,1);
        return cal.getTime();
    }
}