java - 在javafx中填充表格 View

Question

我在 javafx 中有一个 TableView ，我想用对象类型 Course 填充它。这个想法是，在我的 Course 类中，我有一个复合主键，它是一个不同的类 CourseId。我想在 TableView 的一列中添加 CourseId 类中存在的 courseno，但我不知道如何获取它。

我的类(class)类(class):

package com.licenta.ascourses.ui.model;

import java.io.Serializable;

public class Course implements Serializable {

    private CourseId idCourse = new CourseId();
    private int year;
    private int semester;
    private String discipline;
    private String professor;

    public Course() {

    }

    public Course(CourseId idCourse, int year, int semester) {
        super();
        this.idCourse = idCourse;
        this.year = year;
        this.semester = semester;
    }

    public Course(CourseId idCourse, int year, int semester, String discipline, String professor) {
        this.idCourse=idCourse;
        this.year = year;
        this.semester = semester;
        this.discipline = discipline;
        this.professor = professor;
    }

    public CourseId getIdCourse() {
        return idCourse;
    }

    public void setIdCourse(CourseId idCourse) {
        this.idCourse = idCourse;
    }

    public int getYear() {
        return year;
    }

    public void setYear(int year) {
        this.year = year;
    }

    public int getSemester() {
        return semester;
    }

    public void setSemester(int semester) {
        this.semester = semester;
    }

    public String getDiscipline() {
        return discipline;
    }

    public void setDiscipline(String discipline) {
        this.discipline = discipline;
    }

    public String getProfessor() {
        return professor;
    }

    public void setProfessor(String professor) {
        this.professor = professor;
    }



}

我的 courseId 类(class):

package com.licenta.ascourses.ui.model;

import java.io.Serializable;



public class CourseId implements Serializable {

    private int idDiscipline;
    private int idProfessor;
    private int courseNo;

    public CourseId()   {

    }

    public CourseId(int idDiscipline, int idProfessor, int courseNo) {
        super();
        this.idDiscipline = idDiscipline;
        this.idProfessor = idProfessor;
        this.courseNo = courseNo;
    }

    public int getIdDiscipline() {
        return idDiscipline;
    }

    public void setIdDiscipline(int idDiscipline) {
        this.idDiscipline = idDiscipline;
    }

    public int getIdProfessor() {
        return idProfessor;
    }

    public void setIdProfessor(int idProfessor) {
        this.idProfessor = idProfessor;
    }

    public int getCourseNo() {
        return courseNo;
    }

    public void setCourseNo(int courseNo) {
        this.courseNo = courseNo;
    }

    public boolean equals(Object o) {

        return true;
    }

    public int hashCode() {

        return 1;
    }

}

columnNumarCurs.setCellValueFactory(new PropertyValueFactory<Course, Integer>(""));
        columnAn.setCellValueFactory(new PropertyValueFactory<Course, Integer>("year"));
        columnSemestru.setCellValueFactory(new PropertyValueFactory<Course, Integer>("semester"));
        columnDisciplina.setCellValueFactory(new PropertyValueFactory<Course, String>("discipline"));
        columnProfesor.setCellValueFactory(new PropertyValueFactory<Course, String>("professor"));

Answer 1

setCellValueFactory 方法需要 Callback<CellDataFeatures, ObservableValue> :即映射 CellDataFeatures 的函数反对ObservableValue包含要显示的值。由于您拥有的值是 int ，并假设columnNumarCurs是 TableColumn<Course, Number> ，适当的ObservableValue类型是 IntegerProperty 。所以你可以这样做:

columnNumarCurs.setCellValueFactory(
    cellData -> new SimpleIntegerProperty(cellData.getValue().getIdCourse().getCourseNo()));