learning java ATW ScrollPane

import java.awt.*;

public class ScrollPaneTest {
    public static void main(String[] args) {
        var f = new Frame("测试窗口");

        var sp = new ScrollPane(ScrollPane.SCROLLBARS_ALWAYS);

        sp.add(new TextField());
        sp.add(new Button("click"));

        f.add(sp);

        f.setBounds(,,,);

        f.setVisible(true);

    }
}

result: