请问这是一个什么类？
public class PairValue<FIRST, SECOND> implements Serializable{
public FIRST first;
public SECOND second;
public PairValue (FIRST first, SECOND second) {
this.first = first;
this.second = second;
}
}
public class PairValue<FIRST, SECOND> implements Serializable{
public FIRST first;
public SECOND second;
public PairValue (FIRST first, SECOND second) {
this.first = first;
this.second = second;
}
}
