java - java抽象接口(interface)中的用户对象

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我看到抽象内容就是接口(interface)传递的变量值。请告诉我如何运行这些功能

public interface Style {

    void display();
}

public abstract class ActionFrame {

//Pass the parameter to the function is the interface
    void addStyle(Style style) {
    }
}

public class Test {
    public static void main(String[] args) {
            //Call class abstract 
            CActionFrame cActionFrame = new CActionFrame();
            //Call function addStyle with parameter is the interface : Style
            cActionFrame.addStyle(new Style() {
            //Override function display() in Style 
                @Override
                public void display() {
//I want to display text : "This is Test" but when run result is not output display
                    System.out.println("This is Test");
                }
            });
//How to call display ()
           cActionFrame.?
        }
    }

我的问题是你遇到过很多这样的说法。

btnButton.addActionListener(new ActionListener() {

    @Override
    public void actionPerformed(ActionEvent ae) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }
});

Answer 1

如果我理解正确的话，您想调用传递的 Style 对象的 display 方法，对吗？然后是这样的:

public interface Style {

    public void display();
}

public abstract class ActionFrame {
    private Style mStyle;
    public void addStyle(Style style) {
        mStyle = style;
    }
    public Style getStyle(){
        return mStyle;
    }
}

public class Test {
    public static void main(String[] args) {
        CActionFrame cActionFrame = new CActionFrame();
        cActionFrame.addStyle(new Style() {

            @Override
            public void display() {
                System.out.println("aaaaaaaaaaaaaaa");
            }
        });


        cActionFrame.getStyle().display();
    }
}