我目前正在开发一个应用程序，在内部有一个HashMap，用于存储与字符串关联的已创建任务，声明如下：
private Map<String, Task> _tabs = new HashMap<String,Task>();
它在终端中工作正常，但目前我正在为所述应用程序开发一个javafx GUI，起初，我认为我需要一个ListView对象来列出任务，我做了如下：
@FXML
private ListView<Task> lstView = new ListView<Task>();
@FXML
private CheckBox verified;
@FXML
private CheckBox finished;
@FXML
private TextField name;
@FXML
private TextArea description;
@FXML
private Button refresh;
@FXML
private TextField tf;
@FXML
private TextField taskName;
@FXML
private TextField assignee;
@FXML
private TextArea comment;
@FXML
private TableColumn taskName;
@FXML
private TableColumn taskAuthor;
@FXML
private TableColumn taskAssignee;
ScreenController controller;
@FXML
public void refreshList() {
lstView.setItems(FXCollections.observableArrayList(shl.mapToArray())); //shl is my Shell object that stores the Map and is inherited by this javaFX controller class.
lstView.getSelectionModel().setSelectionMode(SelectionMode.MULTIPLE);
lstView.setOnMouseClicked(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
System.out.println("clicked on " + lstView.getSelectionModel().getSelectedItem());
shl.setCurrentTab((Task) lstView.getSelectionModel().getSelectedItem());
taskName.setText(shl.getCurrentTab().getName());
description.setText(shl.getCurrentTaskDescription());
name.setText(shl.getCurrentTab().getAssignee());
comment.setText(shl.getCurrentTab().getComment());
}
});
}
这也有效。但是，请注意我使用了我编写的mapToAray()方法，它基本上返回了一个Task列表。
我写的是ListView会显示这样的元素。
TaskName - AssignedUser
这很好，但现在我也要显示任务的创建者，我不再将ListView视为我需要的对象。所以我试图切换到TableView，但我无法让它工作，接收地图......
@FXML
private TableView<String,Task> taskTable = new TableView<String,Task>();
@FXML
public void refreshList() {
taskTable.setItems((FXCollections.observableMap(shl.getTabs())); //I know that setItems() requires a ListView object, I just don't see how to do this without it
taskTable.getSelectionModel().setSelectionMode(SelectionMode.MULTIPLE);
taskTable.setOnMouseClicked(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
System.out.println("clicked on " + taskTable.getSelectionModel().getSelectedItem());
shl.setCurrentTab((Task) taskTable.getSelectionModel().getSelectedItem());
taskName.setText(shl.getCurrentTab().getName());
description.setText(shl.getCurrentTaskDescription());
name.setText(shl.getCurrentTab().getAssignee());
comment.setText(shl.getCurrentTab().getComment());
}
});
}
注意：三个表格列为c1，c2和c3
我需要我的桌子显示如下内容：
任务名称|任务作者|任务受让人
攀岩 | Dwayne JOHNSON | Hulk HOGAN
修改
我忘了粘贴我的Task类，这里是：
package main.entities;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import javax.naming.NoPermissionException;
public class Task implements Serializable{
/**
*
*/
private static final long serialVersionUID = -5416272475989116821L;
private List<File> _files = new ArrayList<File>();
private User _assignee;
private boolean _status = false;
private Shell _shl;
private String _name;
private String _description;
private String _lastEditDate;
private User _lastEditor;
private String comment;
private String author;
/**
* @param shl
* @param name
* @param description
* @param assignee
*/
public Task(Shell shl, String name, String description, String assignee){
this._shl = shl;
this._name = name;
this._description = description;
this._assignee = shl.findUser(assignee);
this.author = shl.getCurrentUser().getName();
shl.addTask(this);
}
/**
* (non-Javadoc)
* @see java.lang.Object#toString()
*/
public String toString(){
return _name+" - "+_assignee;
}
/**
* @return description string
*/
public String getDescription(){
return this._description;
}
/**
* @param description
*/
public void setDescription(String description){
this._description = description;
}
/**
* @param String fileName: name of the file that will be created with the tab saved object locally
*/
public void save(String fileName){
try{
ObjectOutputStream stream =
new ObjectOutputStream(
new BufferedOutputStream(
new FileOutputStream(fileName)));
this.setTabName(fileName);
stream.writeObject(this);
stream.flush();
stream.close();
}catch(IOException ioe){
ioe.printStackTrace();
}
}
/**
* @param name
*/
private void setTabName(String name) {
this.setName(name);
}
/**
* @param file name: String
* @param userID: String
*/
public void deleteFile(String fileName, String uID){
_shl.removeFile(_shl.getFile(fileName));
}
/**
* @param fileName
* @return null
* @throws IOException
*/
public File downloadFile(String fileName) throws IOException{
return null;
//TODO
//This method is probably deprecated by javaFX fileChooser
}
/**
* @param trabalhador
* @throws NoPermissionException
*/
public void setAssignee(User trabalhador) {
this._assignee = trabalhador;
}
/**
* @param Verification
* @return boolean status
*/
public boolean checkStatus(){
return _status;
}
/**
* changes status to opposite
* @throws NoPermissionException
*/
public void changeStatus() throws NoPermissionException{
if (_shl.getCurrentUser() instanceof Manager){
if (this._status == true)
this._status = false;
else this._status = true;
}
else throw new NoPermissionException("You need Manager rights to change Status");
}
/**
* @return void;
*/
public String getAssignee(){
return this._assignee.getID();
}
/**
* @return task name
*/
public String getName() {
return _name;
}
/**
* @param _name
*/
public void setName(String _name) {
this._name = _name;
}
/**
* @param f
*/
public void addFile(File f) {
this._files.add(f);
}
/**
* @return date of last edition
*/
public String getLastEditDate() {
return _lastEditDate;
}
/**
* @param _lastEditDate
*/
public void setLastEditDate(String _lastEditDate) {
this._lastEditDate = _lastEditDate;
}
/**
* @return last editor
*/
public User getLastEditor() {
return _lastEditor;
}
/**
* @param _lastEditor
*/
public void setLastEditor(User _lastEditor) {
this._lastEditor = _lastEditor;
}
public File getFile() {
//TODO
return null;
}
public void setComment(String text) {
this.comment = text;
}
public String getComment() {
return this.comment;
}
}
答案 0 :(得分：1)
您可以通过这种方式将地图用作表格视图：
请注意我在这里使用Strings作为示例数据，而不是任务。
public class MapTableView extends Application {
@Override
public void start(Stage stage) {
// sample data
Map<String, String> map = new HashMap<>();
map.put("one", "One");
map.put("two", "Two");
map.put("three", "Three");
// use fully detailed type for Map.Entry<String, String>
TableColumn<Map.Entry<String, String>, String> column1 = new TableColumn<>("Key");
column1.setCellValueFactory(new Callback<TableColumn.CellDataFeatures<Map.Entry<String, String>, String>, ObservableValue<String>>() {
@Override
public ObservableValue<String> call(TableColumn.CellDataFeatures<Map.Entry<String, String>, String> p) {
// this callback returns property for just one cell, you can't use a loop here
// for first column we use key
return new SimpleStringProperty(p.getValue().getKey());
}
});
TableColumn<Map.Entry<String, String>, String> column2 = new TableColumn<>("Value");
column2.setCellValueFactory(new Callback<TableColumn.CellDataFeatures<Map.Entry<String, String>, String>, ObservableValue<String>>() {
@Override
public ObservableValue<String> call(TableColumn.CellDataFeatures<Map.Entry<String, String>, String> p) {
// for second column we use value
return new SimpleStringProperty(p.getValue().getValue());
}
});
ObservableList<Map.Entry<String, String>> items = FXCollections.observableArrayList(map.entrySet());
final TableView<Map.Entry<String,String>> table = new TableView<>(items);
table.getColumns().setAll(column1, column2);
Scene scene = new Scene(table, 400, 400);
stage.setScene(scene);
stage.show();
}
public static void main(String[] args) {
launch();
}
}