Java中调用超类的equals方法

我遇到一个问题，我试图使用子类的对象测试超类的

equals

方法：

我的超类是：

public class Excluded_DateTime implements Serializable {

private Date fromDate;   
private Time fromTime;
private Date toDate;   
private Time toTime;
private Valid active;

子类的不同之处在于将标识符作为键：

public class Classifier_Excluded_DateTime implements Serializable {

private Integer classifierExcludedDateTimeNo;    
private Excluded_DateTime classifierExcludedDateTime;   

因此，我想测试

Classifier\u Excluded\u DateTime

对象的相等性，而不使用字段

classifierxcludeddatetimeno

但是我发现超类的

equals

方法从未被调用

超类的

equals

和

hashCode

方法生成的NetBeans如下所示：

@Override
    public int hashCode() {        
        int hash = 7;
        hash = 23 * hash + (this.fromDate != null ? this.fromDate.hashCode() : 0);
        hash = 23 * hash + (this.fromTime != null ? this.fromTime.hashCode() : 0);
        hash = 23 * hash + (this.toDate != null ? this.toDate.hashCode() : 0);
        hash = 23 * hash + (this.toTime != null ? this.toTime.hashCode() : 0);
        hash = 23 * hash + (this.active != null ? this.active.hashCode() : 0);
        return hash;
    }

@Override
public boolean equals(Object obj) {        
    if (obj == null) {
        return false;
    }
    if (getClass() != obj.getClass()) {
        return false;
    }
    final Excluded_DateTime other = (Excluded_DateTime) obj;
    if (this.fromDate != other.fromDate && (this.fromDate == null || !this.fromDate.equals(other.fromDate))) {
        return false;
    }
    if (this.fromTime != other.fromTime && (this.fromTime == null || !this.fromTime.equals(other.fromTime))) {
        return false;
    }
    if (this.toDate != other.toDate && (this.toDate == null || !this.toDate.equals(other.toDate))) {
        return false;
    }
    if (this.toTime != other.toTime && (this.toTime == null || !this.toTime.equals(other.toTime))) {
        return false;
    }
    if (this.active != other.active) {
        return false;
    }
    return true;
}

@Override
public int hashCode() {                
    int hash = 7;
    hash = 79 * hash + (this.getClassifierExcludedDateTimeNo() != null ? this.getClassifierExcludedDateTimeNo().hashCode() : 0);
    return hash;
}

@Override
public boolean equals(Object obj) {        
    if (obj == null) {
        return false;
    }
    if (getClass() != obj.getClass()) {
        return false;
    }
    if (! super.equals(obj)) {            
        return false;
    }
    final Classifier_Excluded_DateTime other = (Classifier_Excluded_DateTime) obj;   

    if (this.getClassifierExcludedDateTimeNo() != other.getClassifierExcludedDateTimeNo() && (this.getClassifierExcludedDateTimeNo() == null || !this.classifierExcludedDateTimeNo.equals(other.ClassifierExcludedDateTimeNo))) {            
        return false;
    } 
    return true;
}

以及以下子类：

@Override
    public int hashCode() {        
        int hash = 7;
        hash = 23 * hash + (this.fromDate != null ? this.fromDate.hashCode() : 0);
        hash = 23 * hash + (this.fromTime != null ? this.fromTime.hashCode() : 0);
        hash = 23 * hash + (this.toDate != null ? this.toDate.hashCode() : 0);
        hash = 23 * hash + (this.toTime != null ? this.toTime.hashCode() : 0);
        hash = 23 * hash + (this.active != null ? this.active.hashCode() : 0);
        return hash;
    }

@Override
public boolean equals(Object obj) {        
    if (obj == null) {
        return false;
    }
    if (getClass() != obj.getClass()) {
        return false;
    }
    final Excluded_DateTime other = (Excluded_DateTime) obj;
    if (this.fromDate != other.fromDate && (this.fromDate == null || !this.fromDate.equals(other.fromDate))) {
        return false;
    }
    if (this.fromTime != other.fromTime && (this.fromTime == null || !this.fromTime.equals(other.fromTime))) {
        return false;
    }
    if (this.toDate != other.toDate && (this.toDate == null || !this.toDate.equals(other.toDate))) {
        return false;
    }
    if (this.toTime != other.toTime && (this.toTime == null || !this.toTime.equals(other.toTime))) {
        return false;
    }
    if (this.active != other.active) {
        return false;
    }
    return true;
}

@Override
public int hashCode() {                
    int hash = 7;
    hash = 79 * hash + (this.getClassifierExcludedDateTimeNo() != null ? this.getClassifierExcludedDateTimeNo().hashCode() : 0);
    return hash;
}

@Override
public boolean equals(Object obj) {        
    if (obj == null) {
        return false;
    }
    if (getClass() != obj.getClass()) {
        return false;
    }
    if (! super.equals(obj)) {            
        return false;
    }
    final Classifier_Excluded_DateTime other = (Classifier_Excluded_DateTime) obj;   

    if (this.getClassifierExcludedDateTimeNo() != other.getClassifierExcludedDateTimeNo() && (this.getClassifierExcludedDateTimeNo() == null || !this.classifierExcludedDateTimeNo.equals(other.ClassifierExcludedDateTimeNo))) {            
        return false;
    } 
    return true;
}

我可以通过修改这两个类的方法来做我想做的事情吗

---

我试图测试

Classifier\u Excluded\u DateTime

的两个实例是否相同，但没有在比较中包含字段

classifierExcludedDateTimeNo

。

您没有将

Classifier\u Excluded\u DateTime

声明为

Excluded\u DateTime

的子类。要做到这一点，您需要说：

public class Classifier_Excluded_DateTime extends Excluded_DateTime {

现在，似乎更像是将

Excluded\u DateTime

视为

Classifier\u Excluded\u DateTime

的一种委托，因为在

Classifier\u Excluded\u DateTime

中有一个成员实例变量，类型为

Excluded\u DateTime

（你说的

private排除了\u DateTime classifierxcludeddatetime；

）我不认为这是你的意图，因为你在文章中谈论的是子类和超类

---

（更新：删除了我认为没有显式的

super.equals（）

调用的错误）.

这两个类之间没有任何继承关联。你有一个组合关联。你到底想做什么？哇，你是对的，很抱歉我错过了。我会修改的-谢谢。我真傻，错过了两个类之间的

扩展

关系。谢谢！不像我错过了你对

supe的呼叫那样愚蠢r、 等于（…）

，这是我在发布原始答案时认为缺少的内容：-）