sortcomparator.java

基于j2me的手机应用程序-电话本

/*
 * 按名字排序
 */
package PhoneBook;
import javax.microedition.rms.*;


public class SortComparator implements RecordComparator {
	private String name_1 , name_2;

	public int compare(byte[] rec1,byte[] rec2){
		BookAccount account = null;
		try{		
		account = BookAccount.deserialize(rec1);
		name_1 = account.getUserName();
		
		account = BookAccount.deserialize(rec2);
		name_2 = account.getUserName();
		
		account = null;
		
		}catch(Exception e){
			account = null;
			System.out.println("deserialize error");
		}
		//按照名字顺序排序
		if(name_1.compareTo(name_2)==0)
		  {
		     return RecordComparator.EQUIVALENT;
		  }
		  else if(name_1.compareTo(name_2)<0)
		  {
		    return RecordComparator.PRECEDES;
		 }
				
		return RecordComparator.FOLLOWS;
	}
}