java - javafx2中的可编辑表

Question

我使用 javafx2 在运行时创建了带有可编辑单元格的表格。按 Enter 键时，表格单元格已编辑但未更新，并且表类 set 方法在 Bankmodal.java 中的 tab_bankname.set(tab_bankname); 位置显示错误，错误消息

The method set(String) is undefined for the type String

表类名称:bankmodal.java

import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;

public class bankmodal {

    public final StringProperty tab_bankname;
    public final StringProperty tab_bankaccno;
    public final StringProperty tab_accname;
    public final StringProperty tab_uniqueno;
    public final StringProperty  tab_address;
    public final StringProperty  tab_accounttype;
    public final StringProperty  tab_ifsc;
    public final StringProperty  tab_micr;

    public  bankmodal(String tab_uniqueno,String tab_accname,String tab_bankaccno,
                String tab_address,String tab_accounttype,String tab_ifsc,String tab_micr,String tab_bankname)
    {

        this.tab_bankaccno = new SimpleStringProperty(tab_bankaccno);
        this.tab_address = new SimpleStringProperty(tab_address);
        this.tab_accounttype = new SimpleStringProperty(tab_accounttype);
        this.tab_ifsc = new SimpleStringProperty(tab_ifsc);
        this.tab_accname = new SimpleStringProperty(tab_accname);
        this.tab_uniqueno = new SimpleStringProperty(tab_uniqueno);
        this.tab_micr = new SimpleStringProperty(tab_micr);
        this.tab_bankname = new SimpleStringProperty(tab_bankname);
    }


    public String getTab_bankname() {
        return tab_bankname.get();
    }


    public void setTab_bankname(String tab_bankname) {
        tab_bankname.set(tab_bankname);
    }


    public String getTab_bankaccno() {
        return tab_bankaccno.get();
    }


    public void setTab_bankaccno(String tab_bankaccno) {
        tab_bankaccno.set(getTab_bankaccno());
    }


    public String getTab_accname() {
        return tab_accname.get();
    }


    public void setTab_accname(String tab_accname) {
        tab_accname.set(tab_accname);
    }


    public String getTab_uniqueno() {
        return tab_uniqueno.get();
    }


    public void setTab_uniqueno(String tab_uniqueno) {
        tab_uniqueno.set(tab_uniqueno);
    }


    public String getTab_address() {
        return tab_address.get();
    }


    public void setTab_address(String tab_address) {
        tab_address.set(tab_address);
    }


    public String getTab_accounttype() {
        return tab_accounttype.get();
    }


    public void setTab_accounttype(String tab_accounttype) {
        tab_accounttype.set(tab_accounttype);
    }


    public String getTab_ifsc() {
        return tab_ifsc.get();
    }


    public void setTab_ifsc(String tab_ifsc) {
        tab_ifsc.set(tab_ifsc);
    }


    public String getTab_micr() {
        return tab_micr.get();
    }


    public void setTab_micr(String tab_micr) {
        tab_micr.set(tab_micr);
    }
}

Controller 类名称:Bank.java

public void fetchData(){
    bankDetails.setEditable(true);
    try{
        bank = FXCollections.observableArrayList();
        ps = con.prepareStatement("select clientid,clientname,accountnumber,bankaddress,accounttype,ifsccode,branchname,bankname from bank");
        rs = ps.executeQuery();
        while(rs.next()){
            bank.add(new bankmodal(rs.getString(1), rs.getString(2), rs.getString(3), rs.getString(4), rs.getString(5),rs.getString(6),rs.getString(7),rs.getString(8)));

        }

        tab_uniqueno.setCellValueFactory(new PropertyValueFactory("tab_uniqueno"));

        tab_accname.setCellValueFactory(new PropertyValueFactory("tab_accname"));
        tab_accname.setCellFactory(TextFieldTableCell.<bankmodal>forTableColumn());
        tab_accname.setOnEditCommit(
            new EventHandler<CellEditEvent<bankmodal, String>>() {
                @Override
                public void handle(CellEditEvent<bankmodal, String> t) {
                    ((bankmodal) t.getTableView().getItems().get(
                        t.getTablePosition().getRow())
                        ).setTab_accname(t.getNewValue());
                }
            }
        );
        tab_bankaccno.setCellValueFactory(new PropertyValueFactory("tab_bankaccno"));
        tab_bankaccno.setCellFactory(TextFieldTableCell.<bankmodal>forTableColumn());
        tab_bankaccno.setOnEditCommit(
            new EventHandler<CellEditEvent<bankmodal, String>>() {
                @Override
                public void handle(CellEditEvent<bankmodal, String> t) {
                    ((bankmodal) t.getTableView().getItems().get(
                        t.getTablePosition().getRow())
                        ).setTab_bankaccno(t.getNewValue());
                }
            }
        );
        tab_address.setCellValueFactory(new PropertyValueFactory("tab_address"));
        tab_address.setCellFactory(TextFieldTableCell.<bankmodal>forTableColumn());
        tab_address.setOnEditCommit(
            new EventHandler<CellEditEvent<bankmodal, String>>() {
                @Override
                public void handle(CellEditEvent<bankmodal, String> t) {
                    ((bankmodal) t.getTableView().getItems().get(
                        t.getTablePosition().getRow())
                        ).setTab_address(t.getNewValue());
                }
            }
        );
        tab_accounttype.setCellValueFactory(new PropertyValueFactory("tab_accounttype"));
        tab_accounttype.setCellFactory(TextFieldTableCell.<bankmodal>forTableColumn());
        tab_accounttype.setOnEditCommit(
            new EventHandler<CellEditEvent<bankmodal, String>>() {
                @Override
                public void handle(CellEditEvent<bankmodal, String> t) {
                    ((bankmodal) t.getTableView().getItems().get(
                        t.getTablePosition().getRow())
                        ).setTab_accounttype(t.getNewValue());
                }
            }
        );
        tab_ifsc.setCellValueFactory(new PropertyValueFactory("tab_ifsc"));
        tab_ifsc.setCellFactory(TextFieldTableCell.<bankmodal>forTableColumn());
        tab_ifsc.setOnEditCommit(
            new EventHandler<CellEditEvent<bankmodal, String>>() {
                @Override
                public void handle(CellEditEvent<bankmodal, String> t) {
                    ((bankmodal) t.getTableView().getItems().get(
                        t.getTablePosition().getRow())
                        ).setTab_ifsc(t.getNewValue());
                }
            }
        );
        tab_micr.setCellValueFactory(new PropertyValueFactory("tab_micr"));
        tab_micr.setCellFactory(TextFieldTableCell.<bankmodal>forTableColumn());
        tab_micr.setOnEditCommit(
            new EventHandler<CellEditEvent<bankmodal, String>>() {
                @Override
                public void handle(CellEditEvent<bankmodal, String> t) {
                    ((bankmodal) t.getTableView().getItems().get(
                        t.getTablePosition().getRow())
                        ).setTab_micr(t.getNewValue());
                }
            }
        );
        tab_bankname.setCellValueFactory(new PropertyValueFactory("tab_bankname"));
        tab_bankname.setCellFactory(TextFieldTableCell.<bankmodal>forTableColumn());
        tab_bankname.setOnEditCommit(
            new EventHandler<CellEditEvent<bankmodal, String>>() {
                @Override
                public void handle(CellEditEvent<bankmodal, String> t) {
                    ((bankmodal) t.getTableView().getItems().get(
                        t.getTablePosition().getRow())
                        ).setTab_bankname(t.getNewValue());
                }
            }
        );

        bankDetails.setItems(null);

        bankDetails.setItems(bank);
    }
    catch(Exception e)
    {e.printStackTrace();}
}

主类名称:Main.java

Answer 1

看看这个方法:

public void setTab_bankname(String tab_bankname) {
    tab_bankname.set(tab_bankname);
}

这里，tab_bankname可以是你的参数String tab_bankname或者你的成员字段public final StringProperty tab_bankname，目前还不清楚你引用的是什么。

运行时出现以下错误:

The method set(String) is undefined for the type String

因为在运行时tab_bankname有一个对参数的引用，它是一个String，它没有方法set(String)。

通常，您的 IDE 会在编译时给出相同的错误，以避免运行时异常。

为了避免这种困惑:

第一个解决方案:使用“this”(并用它更新所有的 setter/getter )

这确保了 this.tab_bankname 是一个 StringProperty

public void setTab_bankname(String tab_bankname) {
    this.tab_bankname.set(tab_bankname);
}

第二种解决方案:不要在参数中使用与您的任何成员相同的名称

public void setTab_bankname(String _bankName) {
    tab_bankname.set(_bankName);
}

您还可以快速阅读 Code Conventions for the Java TM Programming Language以避免将来出现此类困惑。