Java：在接受参数时替换已弃用的show（）方法

Question

这是一个实现简单GUI的程序。

我通常会使用setVisible(true)替换show方法但是，当show()方法接受参数时，我不确定如何处理此问题，我已尝试{{1}但是我的编译器没有打动。在此先感谢

@SuppressWarnings("deprecated")

GUI对象类

import java.awt.*;
import java.awt.event.*;

声明Frame类的对象

public class UI2 extends Frame
{

构造

    public Button b;
    public TextField t;
    public FirstPanel p1;
    public SecondPanel p2;
    Choice c;

FirstPanel类

    UI2()
    {
         setLayout(new GridLayout(2,1));

         p1 = new FirstPanel(this);
         add(p1);

         p2 = new SecondPanel(this); 
         add(p2);
         validate();
    }
}

创建GUI方法

class FirstPanel extends Panel implements ActionListener
{
    UI2 myUI;
    public PopupMenu pm1;
    public PopupMenu pm2;
public MenuItem pm1_1, pm1_2, pm2_1, pm2_2;

FirstPanel(UI2 myUI)
{
    this.myUI = myUI;
    createTheGUI();
}

选择菜单项时将调用此方法

public void createTheGUI()
{
    pm1 = new PopupMenu("First Menu");
    pm2 = new PopupMenu("Second Menu");

    pm1_1 = new MenuItem("First Menu First Choice");
    pm1_2 = new MenuItem("First Menu Second Choice");
    pm2_1 = new MenuItem("Second Menu First Choice");
    pm2_2 = new MenuItem("Second Menu Second Choice");

    pm1_1.addActionListener(this);
    pm1_2.addActionListener(this);
    pm2_1.addActionListener(this);
    pm2_2.addActionListener(this);

    pm2_2.setEnabled(false);

    pm1.add(pm1_1);
    pm1.add(pm1_2);
    pm2.add(pm2_1);
    pm2.add(pm2_2);

    pm1.addActionListener(this);
    pm2.addActionListener(this);

    add(pm1);
    add(pm2);
}

一旦myUI对象被实例化就被调用

public void actionPerformed(ActionEvent e)
{
    Object source = e.getSource();
    if(source instanceof MenuItem)
    {
        handleMenuItems(e, (MenuItem)source);
    }
}

public void handleMenuItems(ActionEvent e, MenuItem source)
{
    String selected = source.getLabel();

    System.out.println("String Selected is: " + selected);
}
}