使用setData()获取使用SWT小部件附加的所有键/值对

import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class SetDataExample {
    public static void main(String[] args) {
        Display display = new Display();
        Shell shell = new Shell(display);

        Button button = new Button(shell, SWT.PUSH);
        button.setText("Click me");

        // 设置附加数据
        button.setData("key1", "value1");
        button.setData("key2", 42);

        // 获取附加数据
        String value1 = (String) button.getData("key1");
        int value2 = (int) button.getData("key2");

        System.out.println("Value 1: " + value1);
        System.out.println("Value 2: " + value2);

        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch()) {
                display.sleep();
            }
        }
        display.dispose();
    }
}