java - NetBeans Matisse - 从另一个类访问 jframe 组件

Question

来自 Netbeans 的 Matisse 代码已被阻止。我遇到的问题是，我必须从不同包中的另一个类将 setBackground 设置为 JLabel，但我无法执行此操作，因为我无法访问 JLabel 由于其私有(private)且被阻止的代码。

有什么办法可以解决这个问题吗？

Answer 1

"The Matisse code from Netbeans is blocked"

您可以编辑它，如图 here

"because i have no access to the JLabel due to its private and blocked code"

只需为另一个类中的标签编写一个getter方法

public class OtherClass .. {
    private JLabel jLabel1;

    public JLabel getLabel() {
        return jLabel1;
    }
}

import otherpackage.OtherClass;

public class MainFrame extends JFrame {
    private OtherClass otherClass;
    ...
    private void jButtonActionPerformed(ActionEvent e) {
         JLabel label = otherClass.getLabel();
         label.setBackground(...)
    }
}

<小时/>

"Access jframe component from another class"

听起来您正在使用多个框架。请参阅The Use of Multiple JFrames, Good/Bad Practice?

<小时/>

更新

" I have a MAIN frame made in matisse but due to some reasons i have to set the background of an textField inside matisse from another class when X validation happens in the other class"

然后您可以做的是将 Main 框架的引用传递给另一个类，并在 Main 框架中拥有一个 setter 。比如(我会提供一个访问的接口(interface))

public interface Gettable {
    public void setLabelBackground(Color color);
}

public class Main extends JFrame implements Gettable {
    private JLabel jLabel1;
    private OtherPanel otherPanel;

    public void initComponents() {
        otherPanel = new OtherPanel(Main.this); // see link above to edit this area
    }

    @Override
    public void setLabelBackground(Color color) {
        jLabel1.setBackground(color);
    }
}

public class OtherPanel extends JPanel {
    private Gettable gettable;

    public OtherPanel(Gettable gettable) {
        this.gettable = gettable;
    }

    private void jButtonActionPerformed(ActionEvent e) {
        gettable.setLabelBackground(Color.RED);
    }
}