我有很多抽象类的子类,每个子类声明一个具有相同名称的公共静态final字段.我想在抽象超类中使用这个字段而不初始化它,并希望每个子类都被强制初始化它.
我正在考虑这个问题,因为抽象类的所有子类都声明了一个名为UNIQUE_ID的公共静态最终字符串字段,并且每个子类都必须声明具有该名称的字段.
我希望我的问题很清楚,如果不是,请告诉我.
可以或多或少地与此相提并论吗？
我的抽象类看起来像：
public abstract class ExperimentPanelModel extends Panelizable {
protected String nextButtonText;
protected String backButtonText;
protected String skipButtonText;
protected Properties currentFile;
protected List<Properties> pastFiles = new ArrayList<Properties>();
public ExperimentPanelModel(Properties argcurrentfile,List<Properties> argpastfiles) {
currentFile = argcurrentfile;
pastFiles = argpastfiles;
nextButtonText = "Next";
backButtonText = "Back";
skipButtonText = "Skip";
}
...
}
该抽象类的一些非抽象子类看起来像(注意它们都声明了公共静态最终字符串UNIQUE_ID)：
public class ConfigurationGUI extends ExperimentPanelModel {
public static final String UNIQUE_ID = "ConfigurationGUI";
public static final String DATA_MODIFIED = "DataModified";
Date dateOfLastSession;
int ExperimentalSession;
int ExperimentOrder;
boolean nextButtonEnabled = false;
public ConfigurationGUI(Properties argcurrentfile,List<Properties> argpastfiles) {
super(argcurrentfile,argpastfiles);
nextButtonText = "Confirm";
backButtonText = "Abort";
}
...
}
一个例子：
public class Introduction extends ExperimentPanelModel {
public static final String UNIQUE_ID = "Introduction";
public static final String INSTRUCTIONS_XML_FILE = "instructions.xml";
public static final String THIS_INSTRUCTION_PROPERTY = UNIQUE_ID;
private String thisInstructionText = UNIQUE_ID;
Properties readInstructionsProperties = new Properties();
public Introduction(Properties argcurrentfile,List<Properties> argpastfiles) {
...
最后一个：
public class Instruction1 extends ExperimentPanelModel {
public static final String UNIQUE_ID = "Instruction1";
public static final String INSTRUCTIONS_XML_FILE = "instructions.xml";
public static final String THIS_INSTRUCTION_PROPERTY = UNIQUE_ID;
...
}
