java - java中的静态和非静态？

Question

这个问题已经有答案了:

Cannot make a static reference to the non-static method (8 个回答)

已关闭 9 年前。

错误:

Cannot make a static reference to the non-static method setSelectedInfoRole(SelectOption) from the type PeopleInfoViewModel.PeopleInfoData

代码如下:

    @Command
    @NotifyChange({ "peopleInfoList", "selectedFolderInfo" })
    public void encryptInfo() {
        Set selectedPeopleInfo=peopleInfoList.getSelection();
        if (selectedPeopleInfo == null) {
            showError(pageResourceBundle.getText("PLS_SELECT_AN_INFO_TO_CRYPT"));
            return;
        } 
        List<PeopleInfoRecord> folderRecord = new ArrayList<PeopleInfoRecord>();


        for (Object selectedObj : selectedPeopleInfo) {
            if (selectedObj instanceof PeopleInfoData) {
                PeopleInfoData peopleInfoData = (PeopleInfoData) selectedObj;
                ValidInfoRow validInfoRow = Services.folderService().findValidInfoByInfoCode(peopleInfoData.getPeopleInfoRecord().getInfoCode());

                if (InfoType.CHOOSE.equals(validInfoRow.getInfoType())) {
                    if (!CsdcStringUtils.isBlank(peopleInfoData.getPeopleInfoRecord().getInfoValue(), true)) {
                        PeopleInfoData.setSelectedInfoRole(new SelectOption<String>(peopleInfoData.getPeopleInfoRecord().getInfoValue()));
                    }
                }

            }
        }
    }

在上面的方法行

   PeopleInfoData.setSelectedInfoRole(new SelectOption<String>(peopleInfoData.getPeopleInfoRecord().getInfoValue()));

给出错误。

这是 Pojo 类:

public class PeopleInfoData {
        private ListModelList<SelectOption<String>> infoobj;

        private PeopleInfoRecord peopleInfoRecord;
        private SelectOption<String> selectedInfoRole;


        public SelectOption<String> getSelectedInfoRole() {
            return selectedInfoRole;
        }

        public void setSelectedInfoRole(SelectOption<String> selectedInfoRole) {
            this.selectedInfoRole = selectedInfoRole;
        }

        public ListModelList<SelectOption<String>> getInfoobj() {
            return infoobj;
        }

        public void setInfoobj(ListModelList<SelectOption<String>> infoobj) {
            this.infoobj = infoobj;
        }

    }

Answer 1

setSelectedInfoRole() 是一个非静态方法，您尝试以静态方式调用它PeopleInfoData. setSelectedInfoRole 这是错误的。您需要创建该类的对象，然后调用该方法。

new PeopleInfoData().setSelectedInfoRole(new SelectOption<String>(peopleInfoData.getPeopleInfoRecord().getInfoValue()));

但看起来您已经为该类创建了一个对象。您需要使用该对象来调用此方法。

PeopleInfoData peopleInfoData = (PeopleInfoData) selectedObj;
peopleInfoData.setSelectedInfoRole(new SelectOption<String>(peopleInfoData.getPeopleInfoRecord().getInfoValue()));