实现：在Service1中，将在方法transerValue中的service2中返回值，但当稍后调用CalledLaterMethod时，但当我尝试访问CalledLaterMethod中的transerValue时，它为空。有没有可能将值存储在transerValue中，并等待CalledLaterMethod被调用并获得该值？对于任何解决方案，请让我知道

@Data
@AllArgsConstructor
@NoArgsConstructor
@Builder
public class Class1{
  private String param1;
  private String param2;
}

@Data
@AllArgsConstructor
@NoArgsConstructor
@Builder
public class Class2{
  private String param4;
  private String param5;
}

@Slf4j
@Service
public class Service1{
// with method for validationString
  public Class1 validationString(String val1, String val2){
        String present = "PRESENT";
        String empty = "EMPTY";
        String param1Transfer = "";
        String param2Transfer = "";
         if(val1.isEmpty()) param1Transfer = empty;
        else param1Transfer = present;
        if(val2.isEmpty()) param2Transfer = empty;
        else param2Transfer = present;
         Class1 class1 = Class1.builder()
                .param1(param1Transfer)
                .param2(param2Transfer)
                .build();
        return Service2.transerValue(class1);
  }
}

@Slf4j
@Service
public class Service2{
   public static Class1 transerValue(Class1 class1){
   //log will work
   log.info("Well this data show ={}",class1 );
   return class1;
   }
   //this method CalledLaterMethod will be called later and i must get the value being transfer in transerValue
   // and must not change the parameter of CalledLaterMethod
   public static Class2 CalledLaterMethod(OtherClass1 other1,OtherClass other2 ){
   // i tried
   //this is null
   Class1 class1 = new Class1();
   Class1 classClone = transerValue(class1)
   log.info(classClone);
   //trying to do
  Class2 class2 = Class2.builder.
   .param4(classClone.getParam1)
   .param5(classClone.getParam2)
   build();
   return class2;
   }
}