惠州JavaFX树视图的用户域模型是什么？_北大青鸟IT学校

JavaFX树视图的用户域模型是什么？这是大家在学习Java的过程都会遇到的问题，那么下面我们一起来看看惠州北大青鸟学术部老师是怎么解答的。

以下代码显示了如何使用用户域模型数据与TreeView。

创建Employee类以捕获用户域模型，并且代码使用循环将所有员工添加到树视图。

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import java.util.Arrays; 

import java.util.List; 

import javafx.application.Application; 

import javafx.beans.property.SimpleStringProperty; 

import javafx.scene.Node; import javafx.scene.Scene; 

import javafx.scene.control.TreeItem; 

import javafx.scene.control.TreeView; 

import javafx.scene.image.Image; 

import javafx.scene.image.ImageView; 

import javafx.scene.layout.VBox; 

import javafx.scene.paint.Color; 

import javafx.stage.Stage; 

public class Main extends Application {

     List<Employee> employees = Arrays.<Employee>asList(

             new Employee("a1", "A"),

             new Employee("a2", "A"),

             new Employee("e1", "E"));

     private final Node rootIcon =  new ImageView(new Image(getClass().getResourceAsStream("root.png")));

     TreeItem<String> rootNode = new TreeItem<String>("Root",rootIcon);

     public static void main(String[] args) {

         Application.launch(args);

     }

     @Override

     public void start(Stage stage) {

         rootNode.setExpanded(true);

         for (Employee employee : employees) {

             TreeItem<String> empLeaf = new TreeItem<String>(employee.getName());

             boolean found = false;

             for (TreeItem<String> depNode : rootNode.getChildren()) {

                 if (depNode.getValue().contentEquals(employee.getDepartment())){

                     depNode.getChildren().add(empLeaf);

                     found = true;

                     break;

                 }

             }

             if (!found) {

                 TreeItem depNode = new TreeItem(employee.getDepartment());

                 rootNode.getChildren().add(depNode);

                 depNode.getChildren().add(empLeaf);

             }

         }

         stage.setTitle("Tree View Sample");

         VBox box = new VBox();

         final Scene scene = new Scene(box, 400, 300);

         scene.setFill(Color.LIGHTGRAY);

        TreeView<String> treeView = new TreeView<String>(rootNode);

         treeView.setShowRoot(true);

         treeView.setEditable(true);

         box.getChildren().add(treeView);

         stage.setScene(scene);

         stage.show();

     }

     public static class Employee {

         private final SimpleStringProperty name;

         private final SimpleStringProperty department;

         private Employee(String name, String department) {

             this.name = new SimpleStringProperty(name);

             this.department = new SimpleStringProperty(department);

         }

         public String getName() {

             return name.get();

         }

         public void setName(String fName) {

             name.set(fName);

         }

         public String getDepartment() {

             return department.get();

         }

         public void setDepartment(String fName) {

             department.set(fName);

         }

     }

 }

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