Java代码抽象，泛型，这里的泛型java代码看不懂

如何解决Java代码抽象，泛型，这里的泛型java代码看不懂

public abstract class BaseDataItem<V,T,ThisType extends BaseDataItem<V,ThisType>> implements DataItem<V,T> { }

    public abstract class SingularDataItem<Value,T> extends BaseDataItem<Value,SingularDataItem<Value,T>> {
    
        @Override
        protected int buildHashCode(HashCodeBuilder builder) {
            return builder.toHashCode();
        }
    
        @Override
        protected boolean isEquivalent(SingularDataItem<Value,T> o) {
            return true; // the parent class already verifies that the object is the same class
        }
    }

解决方法

嗯，我试过了，返回的输出是真的，这意味着无论我为类 Data 创建多少个不同的对象，它们都将始终相等，因此我不知道为什么要编写这样的代码，也许是这段代码可以从使用此代码的域的角度进行解释。

public class Test {

public static void main(String[] args) {

    SingularDataItem<String,String> singularDataItem = new Data("testing");
    SingularDataItem<String,String> singularDataItem2 = new Data("testing2");
    System.out.println(singularDataItem.isEquivalent(singularDataItem2));
}}


class Data extends SingularDataItem<String,String>{
private String name;

public Data(String name) {
    this.name = name;
}

public String getName() {
    return name;
}}

abstract class BaseDataItem<V,T,ThisType extends BaseDataItem<V,ThisType>> implements DataItem<V,T> {

int buildHashCode(HashCodeBuilder builder){
    return builder.toHashCode();
}

boolean isEquivalent(SingularDataItem<V,T> o){return true;}}

abstract class SingularDataItem<Value,T> extends BaseDataItem<Value,SingularDataItem<Value,T>> {

@Override
protected int buildHashCode(HashCodeBuilder builder) {
    return builder.toHashCode();
}

@Override
protected boolean isEquivalent(SingularDataItem<Value,T> o) {
    return true; // the parent class already verifies that the object is the same class
}}