Java 如何传递绘制组件和对象所需的逻辑？

因此，我实例化了一个对象，其中包含与该对象关联的二维数据矩阵。我在这个数据矩阵上执行我的所有逻辑，现在我准备看到这个2D矩阵的视觉效果

我想根据矩阵中的值打印实心矩形或空心矩形

以下是我在伪代码方面遇到的问题：

public void paintComponent(Graphics g)
{
    g.setColor(Color.gray);
    g.fillRect(0,0, 500, 500);

    // I need the logic from the instantiated logic from the main method but I cant pass the object into the paintComponent method when I tried. How can I access the objectGrid object from the main method in this method? 

}

public static void main(String[] args) {
    Class newObject = new Class();

    //Do operations on newly instantiated object
    newObject.performOperation;

    // Start a new JFrame object which will call the paintComponent method automatically
    // But I want to pass newObject to paintComponent method and I don't know how to do it

    JFrame window = new JFrame();
    window.setSize(500, 500);
    window.setVisible(true);
}

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我希望这是有道理的。谢谢

您需要一个扩展

JFrame

public class MyClass{
    //...
}

public class MyFrame extends JFrame{
    private MyClass obj;

    public MyFrame(MyClass obj){
        this.obj = obj;
        //...
    }

    //...

    public void paintComponent(Graphics g){
        // Paint obj in here
    }

}

然后，您可以这样使用：

MyClass obj = new MyClass();
MyFrame frame = new MyFrame(obj);
//...
frame.setVisible(true);

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谢谢你。这工作做得很好。谢谢你。它甚至导致干净的代码将我的逻辑类和视图类分开。