Question

我有一个带有帮助按钮的package com.tv.ravindra; /** * Created by Ravindra on 22/01/16. */ public class DemoClass extends Activity { ListView list_demo; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.demo); list_demo = (ListView) findViewById(R.id.list_demo); ArrayList<String> arrayList = new ArrayList<String>(); arrayList.add("One"); arrayList.add("Two"); arrayList.add("Three"); arrayList.add("Four"); DemoAdapter adapter = new DemoAdapter(DemoClass.this,arrayList); list_demo.setAdapter(adapter); } public class DemoAdapter extends BaseAdapter { Activity activity; ArrayList<String> arrayList = new ArrayList<String>(); public DemoAdapter(Activity activity,ArrayList<String> arrayList) { this.activity = activity; this.arrayList = arrayList; } @Override public int getCount() { return arrayList.size(); } @Override public Object getItem(int position) { return position; } @Override public long getItemId(int position) { return position; } public class ViewHolder { TextView header_text_tv; RelativeLayout child_ll; } @Override public View getView(int position, View convertView, ViewGroup parent) { final ViewHolder _viewHolder; if (convertView == null) { _viewHolder = new ViewHolder(); LayoutInflater _layInflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE); convertView = _layInflater.inflate(R.layout.demo_item, null); _viewHolder.header_text_tv = (TextView)convertView.findViewById(R.id.header_text_tv); _viewHolder.child_ll = (RelativeLayout)convertView.findViewById(R.id.child_ll); convertView.setTag(_viewHolder); } else { _viewHolder = (ViewHolder) convertView.getTag(); } _viewHolder.header_text_tv.setText(arrayList.get(position)); for(int i=0;i<=10;i++) { TextView msg = new TextView(activity); msg.setBackgroundColor(activity.getResources().getColor(R.color.bg_blue_color)); msg.setText("Number "+i); msg.setPadding(10, 10, 10, 10); msg.setTextColor(getResources().getColor(R.color.white)); RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,ViewGroup.LayoutParams.WRAP_CONTENT); params.setMargins(10, 10, 10, 10); msg.setLayoutParams(params); _viewHolder.child_ll.addView(msg); } return convertView; } } }。当用户点击“帮助”时，我需要打开一个不同的窗口，其中JMenuBar显示游戏说明。当用户在其外部点击时，可以关闭该窗口。我想我丢失了代码，因为它不起作用：

Window.java

.jpg

Menu.java

public class Window extends JWindow
{
  //java.net.URL imgIntro = getClass().getResource("/images/intro.jpg");
  ImageIcon imIntro = new ImageIcon(getClass().getResource("/images/intro.jpg"));

  //java.net.URL imgRegles = getClass().getResource("/images/rules.jpg");
  ImageIcon imRules = new ImageIcon(getClass().getResource("/images/rules.jpg"));

  static Thread t = new Thread();
  static int thread = 0;
  static JButton bouton;
  static int X;
  static int Y;

  public Window( int X, int Y, int type) {

    super();
    Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
    setSize(X,Y);
    setLocation( (dim.width - X)/2 , (dim.height - Y)/2);
    setVisible(true);
    Container fen = getContentPane();

    if (type == 1 ) bouton = new JButton(imIntro);
    else            bouton = new JButton(imRules);

    bouton.setPreferredSize(new Dimension(X, Y) );
    fen.add( bouton);
    bouton.setVisible( true );

    show();


   /* if window introduction,
      just display for 5 secondes */

    if( type == 1 ) {
        try {
            Thread.sleep(5000);
            thread = 1;
        }
        catch( java.lang.InterruptedException ex ) {
            JOptionPane.showMessageDialog(null, "erreur");
            }
        dispose();

    }


    /* if window of rules
       only close it when user clicks */

    else if ( type == 2 ) {
        bouton.addActionListener( new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                     dispose();
                }
        });
    }

 }
}

使用MCVE编辑

    public class Menu extends JMenuBar implements ActionListener{

     Interface map;

            JMenu m5;

    public Menu(Interface map){
            super();
            this.map=map;
           m5 = new JMenu ("Help");//dislay instructions / rules

            this.add(m5);

    public void actionPerformed(ActionEvent evt){

//.../
                      else if(evt.getSource () == m5){
                          //new JWindow
                          Window rules = new Window( 700, 457, 2);

                      }
    }
    }

Answer 1

我建议您在说明窗口使用JDialog，而不是JFrame。例如，请参阅here。

public class Test {

    JFrame mainFrame = new JFrame();
    JDialog instructions = new JDialog(mainFrame);

    public Test() {

        gui();
    }

    public void gui() {

        instructions.setSize(200, 200);

        JMenuBar mb = new JMenuBar();
        JMenu help = new JMenu("Help");
        mb.add(help);
        JMenuItem instructionsMenu = new JMenuItem("Instructions");
        help.add(instructionsMenu);
        instructionsMenu.addActionListener(e -> instructions.setVisible(true));

        mainFrame.setJMenuBar(mb);
        mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        mainFrame.setSize(600, 400);
        mainFrame.setVisible(true);
    }

    public static void main(String[] args) {

        SwingUtilities.invokeLater(() -> new Test());
    }
}

备注：

调用setVisible作为您为窗口做的最后一件事。

在真实程序中，如果您在窗口中有组件，请拨打pack()而不是设置其大小。

Start Swing from the EDT。

Answer 2

为什么没有if条件的else-if条件？这会产生语法错误。

另外，显示窗口的代码应该是这样的：

dispose();
Window rules = new Window( 700, 457, 2);
rules.show();

如何在单击JButton时在JWIndow上显示图像？

使用MCVE编辑

2 个答案: