java - 无法在类对象的 ArrayList 中存储值。 (代码已编辑)

Question

这基本上是一个 Java 代码转换器。它涉及一个 GUI，让用户输入类类型、名称和方法。为了存储这些值，我创建了一个类 VirtualClass与 ArrayList<VirtualClass> classes存储变量boolean isPrivate , String className和String methodName 。然而，我发现ArrayList中没有存储任何内容。 ...请帮我看看问题出在哪里

下面是类(class)VirtualClass

import java.util.*;

public class VirtualClass {

    private static ArrayList<VirtualClass> classes = new ArrayList<VirtualClass>();
    private boolean isPrivate;
    private String className;
    private String methodName;

    public void setVirtualClass(String name, String method, boolean isP){
        this.className = name;
        this.isPrivate = isP;
        this.methodName = method;
    }

    public void createClass(String name, String method, boolean isP){
        this.className = name;
        this.isPrivate = isP;
        this.methodName = method;
        classes.add(this);
    }

作为引用，这里有一些 GUI 中的相关代码，可让用户创建类

public class GuiAddClass extends JFrame{
    private VirtualClass stObject;
        ...

private class Handler implements ActionListener{

    public void actionPerformed(ActionEvent event){

        String cName = inputClassName.getText();
        String mName = inputMethodName.getText();
        boolean isP = true;

        if (classObject.checkName(cName) == false){

            JOptionPane.showMessageDialog(null, "Class name invalid. " +
                    "\nEntered name should not contain java keywords or equal to other existing names. " +
                    "\nPlease try again."); 

        } else if (classObject.checkName(cName) == true) {

            JOptionPane.showMessageDialog(null, "Class saved."); 
                    // this message pane has popped up
            cName = inputClassName.getText();
            mName = inputMethodName.getText();

            if (event.getSource() == publicButton) {
                isP = false;
            } else if (event.getSource() == privateButton) {
                isP = true;
            }
            stObject = new VirtualClass();
            stObject.createClass(cName, mName, isP);
        }

    }// end actionPerformed()

}// end Handler class

这是另一个类中的几个方法，用于显示最终的 javaCode

public String getClassName(){
    String cName = "classname";
    String c = "c";
    for (int i=0; i<classes.size(); i++){
        c = classes.get(i).className;
    }
    cName = c;
    return cName;
}    

public String getMethodName(){
    String mName = "methodname";
    String m = "m";
    for (int i=0; i<classes.size(); i++){
    m = classes.get(i).methodName;
    }
    mName = m;
    return mName;
}

public boolean getIsPrivate(){
    boolean isP = false;
    for (int i=0; i<classes.size(); i++){
        isP = classes.get(i).isPrivate;
    }
    return isP;
}

这里是生成Java代码的方法

    public String getJavaCode(){
        String javaCode = (classObject.getPublic() + " class " + 
stObject.getClassName() + stObject.getListSize() + 
"{\n"+"\t"+"public void "+stObject.getMethodName()+"{\n"+"\t}"+"\n}");
        return javaCode;

我的程序中显示的内容是这样的，其中 c 应该是类名，m 应该是方法名，0 = classes.size()

public class c0{
    public void m{
    }
}

谁能帮我找出问题所在吗？我只是不知道，我收到的答案似乎不起作用。请帮忙!

Answer 1

从您发布的信息来看，您将 VirtualClass stObject 启动到 actionPerformed 方法中似乎很奇怪。这意味着每次您重新创建对象时。

使您的VirtualClass stObject成为全局，例如:

private VirtualClass stObject;

...

stObject = new VirtualClass();

private class Handler implements ActionListener{

    public void actionPerformed(ActionEvent event){

    ...

   stObject.createClass(cName, mName, isP);