JavaFX问题只读取变量的初始值,而从不读取新值?

我正在开发这个javaFX应用程序,该应用程序创建一个对象“StructureNode”,并在更新屏幕UI输入时更新其数据,然后我将该对象分配给“TrussMember”,该“TrussMember”包含两个“StructureNode“实例,最后使用“StructureSolver”来检索每个“TrussMember”中存在的“StructureNode”中的数据,并将其用作矩阵的索引。

问题是,除了这两个整数之外,所有值都能成功读取 private int x_index=1 , y_index=2; 他们总是返回初始值,无论是零、一还是一百。这个问题让我抓狂,希望你能帮上忙。

StructureNode class //对象封装数据

public class StructureNode {

    .
    .
    .
    private int x_index=0 , y_index=0;
    .
    .
    .
    public int getX_index() {
        //System.out.println("x_index = " + x_index);
        return x_index;
    }

    public void setX_index(int nex_index) {
        x_index = nex_index;
        System.out.println("x_index changed to " + x_index);
    }

    public int getY_index() {
        //System.out.println("y_index = " +y_index);
        return y_index;
    }

    public void setY_index(int ney_index) {
        y_index = ney_index;
        System.out.println("y_index changed to " + y_index);
    }

TrussModelBuider class //将“StructureNode”添加到“StructureMember”并将这些成员添加到名为“特拉斯”的更大模型中的类。

public class TrussModelBuider{

    private boolean isBuilt = false;
    private Truss structure;

    public TrussModelBuider(Truss truss){
        structure = truss;
    }

    @Deprecated
    public void addNode(double X, double Y){
        StructureNode n = new StructureNode();
        n.setCoordinates(new Coordinates(X, Y));
        structure.addJoint(n);
        System.out.println("+pt["+X+", "+Y+"]");
    }
    public void addNode(StructureNode n){
        structure.addJoint(n);
        System.out.println("+pt["+n.getCoordinates().getX_COO()+", "+n.getCoordinates().getY_COO()+"]");
    }

    public void removeNode(double X, double Y){
        structure.getJoints().remove(findNodeIndex(X,Y));
    }

    private int findNodeIndex(double X, double Y){
        int index = 0;
        for (int i = 0; i < structure.getJoints().size(); i++) {
            if (structure.getJoints().get(i).getCoordinates().getX_COO()==X
            && structure.getJoints().get(i).getCoordinates().getY_COO()==Y) {
                index = i;
                break;
            }
        }
        return index;
    }

    public void addMember(TrussMember member){
        structure.addMember(member);
        System.out.println("+mem "+member.getID()+": "+member.getStartJoint()+", "+member.getEndJoint());
    }
    public void removeMember(int ID){
        structure.getMembers().remove(findMember(ID));
    }
   

}

public class StructureSolver {

    private Truss structure;
    .
    .
    .
    public StructureSolver(Truss truss){
        structure = truss;
    }
    .
    .
    .
    public void setStructure(Truss structure) {
        this.structure = structure;
    }
    .
    .
    .
    private void createStructureStiffnessMatrix(){
        K = new StiffnessMatrix(structure.getJoints().size()*2);
        assignIds();

        for (TrussMember member: structure.getMembers()) {

            int Nx = member.getNx();
            int Ny = member.getNy();

            int Fx = member.getFx();
            int Fy = member.getFy();

            double lambdaX = calculateLambdaX(member);
            double lambdaY = calculateLambdaY(member);

            double lambdaXSq = lambdaX*lambdaX/ member.getLength();
            double lambdaYSq = lambdaY*lambdaY/ member.getLength();
            double lambdaXY = lambdaX*lambdaY/ member.getLength();

TrussMember class

public class TrussMember {

    private StructureNode startJoint, endJoint;
    .
    .
    .
    public TrussMember() {
    }

    public TrussMember(StructureNode startJoint, StructureNode endJoint) {
        this.startJoint = startJoint;
        this.endJoint = endJoint;
    }
    .
    .
    .    .
    .
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    public double getLength() {
        double calculatedLength = 0;
        Point2D p1 = new Point2D(startJoint.getCoordinates().getX_COO(),
                startJoint.getCoordinates().getY_COO());
        Point2D p2 = new Point2D(endJoint.getCoordinates().getX_COO(),
                endJoint.getCoordinates().getY_COO());
        calculatedLength = p1.distance(p2);
        return calculatedLength;
    }

    public StructureNode getStartJoint() {
        return startJoint;
    }

    public void setStartJoint(StructureNode startJoint) {
        this.startJoint = startJoint;
    }

    public StructureNode getEndJoint() {
        return endJoint;
    }

    public int getNx(){return getStartJoint().getX_index();}
    public int getNy(){return getStartJoint().getY_index();}

    public int getFx(){return getEndJoint().getX_index();}
    public int getFy(){return getEndJoint().getY_index();}

}

in the controller class #onActionMethod

        StructureSolver solver = new StructureSolver();
        solver.setStructure(truss);
        solver.solve();

我尝试使用另一个线程,并尝试使它们成为最终的,没有初始值,但总是相同的结果。