如何在我的Java代码中摆脱静态变量？

Question

Guys:

I would ask a question that may sounds silly. I need to remove using a class static variable which is a counter by senior teammate. he said I should only use static member when necessary, and it is thread unsafe. All I can figure out is to use synchronized key word. I would know if there is better solution. Here is below is my current code.

package gov.faa.infra.ifp.domain.dao.isc;

import static org.junit.Assert.assertTrue;
import static org.junit.Assert.assertNotNull;

import java.util.List;

import org.apache.log4j.Logger;

import gov.faa.infra.ifp.message.MessageCollectionBean;

public abstract class IdentifiableTest<T>{

private static int recordedMessageLength=0; 
private static Logger logger = Logger.getLogger(IdentifiableTest.class.getName());

abstract public void checkIndividualIdentifiable(T identifiableObject);

public void checkIdentifiable(T identifiableObject){
    checkMessageCollection();
    checkIndividualIdentifiable(identifiableObject);
}

public void checkIdentifiableList(List<T> identifiableList){
    checkMessageCollection();
    assertNotNull(identifiableList);
    assertTrue(identifiableList.size()>0);

    for (int i=0; i<identifiableList.size(); i++){          
        checkIndividualIdentifiable(identifiableList.get(i));
    }
}

public void checkMessageCollection(){

    if (MessageCollectionBean.getMessages()!=null){
        if (MessageCollectionBean.getMessages().length>recordedMessageLength){
            int i=MessageCollectionBean.getMessages().length-1;
            for (String message: MessageCollectionBean.getMessages()){
                if(i>=recordedMessageLength){
                    logger.debug(message+"##"+i+"th message in the total of "+MessageCollectionBean.getMessages().length+" messages. recordedMessageLength="+recordedMessageLength+"####Message Collection Bean");
                }
                i--;
            }
            recordedMessageLength=MessageCollectionBean.getMessages().length;
        }
    }

    assertTrue(MessageCollectionBean.getMessages()==null || MessageCollectionBean.getMessages().length==recordedMessageLength);
}

}

Answer 1

看起来它是由checkMessageCollection()计算的，因此使其成为方法调用的结果。