sortcomparator.java

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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("deseralize error");
			
		}
		if (name_1.compareTo(name_2)==0){
			return RecordComparator.EQUIVALENT;
		}else if (name_1.compareTo(name_2)<0)
		{
			return RecordComparator.PRECEDES;
		}
		return RecordComparator.FOLLOWS;
	}
}