Question

我正在为Eclipse编写一个小插件（使用SWT），该插件创建带有几个按钮的视图。为了不产生冗余代码，我想创建某种工厂方法来为我创建按钮。呼叫将类似于：

Button button0 = createButton(new Button(parent, SWT.PUSH), "Test DB zurücksetzen", btnHight, btnWidth, new FormAttachment(0, 2), new FormAttachment(0,2));

到目前为止，我的工厂是这样的：

private Button createButton(Button buttonToCreate, String buttonText, int height, int width, FormAttachment left, FormAttachment top) {

    buttonToCreate.setText(buttonText);
    FormData formData = new FormData();
    formData.height = height;
    formData.width = width;
    formData.left = left;
    formData.top = top;
    buttonToCreate.setLayoutData(formData);

    buttonToCreate.addSelectionListener(new SelectionAdapter() {
        @Override
        public void widgetSelected(SelectionEvent e) {
            Actions.editPropertys(); 
        }
    });

    return buttonToCreate;

}

我的问题是：如何将要执行的Actions类的Method作为参数传递给工厂？

Answer 1

您可以将其作为方法的Runnable参数进行传递。

例如：

private Button createButton(Button buttonToCreate, String buttonText, int height, int width, FormAttachment left, FormAttachment top, Runnable actionOnSelection) {

  // ...
    buttonToCreate.addSelectionListener(new SelectionAdapter() {
        @Override
        public void widgetSelected(SelectionEvent e) {
            actionOnSelection.run(); // change here
        }
    });
}

并调用它：

Button button0 = createButton(new Button(parent, SWT.PUSH), "Test DB zurücksetzen", btnHight, btnWidth, new FormAttachment(0, 2), new FormAttachment(0,2), 
                Actions::editPropertys); // other change here

将静态方法传递给按钮工厂（Java）

1 个答案: