如何在Eclipse RCP编程中从处理程序类将消息写入状态行

import org.eclipse.ui.IStatusLineManager;
import org.eclipse.ui.statushandlers.StatusManager;

public class MyHandler {
    private IStatusLineManager statusLineManager;

    public MyHandler() {
        statusLineManager = StatusManager.getManager().getStatusLineManager();
    }

    public void writeMessageToStatusLine(String message) {
        statusLineManager.setMessage(message);
    }
}

MyHandler handler = new MyHandler();
handler.writeMessageToStatusLine("Hello, world!");