Re: [問題] Swing有時會顯示出來 有時不會

[privatewind (傷神客)]

深感抱歉 早上趕著出門，忘了給code o(‧"‧)o

我主要是getContentPane.add(vc)
這個vc 是繼承Jpanel而來的

但是當我要把vc setVisible(true) 常出錯
時好時壞Orz


/**
 * @(#)test.java
 *
 *
 * @author
 * @version 1.00 2008/6/18
 */
import java.awt.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.media.*;
import java.awt.event.*;
import javax.media.Control;
import java.io.*;

class volumeChange extends JPanel implements ActionListener{
  private GainControl gain;
  private JButton jbadd=new JButton("+");
  private JButton jbsub=new JButton("-");
  private JLabel jl=new JLabel("音量改變 ");
  private Player player;
  public volumeChange(Player tp){
    super();
    setSize(130,33);
    setBorder(new EtchedBorder(EtchedBorder.RAISED));

    player=tp;
    gain=player.getGainControl();

    add(jl);

    add(jbadd);
    jbadd.addActionListener(this);
    jbadd.setMargin( new Insets(0,2,0,2) );

    add(jbsub);
    jbsub.addActionListener(this);
    jbsub.setMargin( new Insets(0,3,0,3) );


  }
  public void actionPerformed(ActionEvent e){
    if(e.getSource()==jbadd){
      float t=gain.getLevel();
      gain.setLevel( (float)(t+0.1>1.0?1.0:t+0.1) );
    }

    if(e.getSource()==jbsub){
      float t=gain.getLevel();
      gain.setLevel( (float)(t-0.1<0?0:t-0.1) );
    }
  }
}

public class test extends JFrame{
  private volumeChange vc;
  private Player player;
  private Component cpc;
  private Component visualWindow;
  private JDesktopPane jdp;
  //public Player getPlayer(){ return player; }
  public test(String title)throws Exception{
    super(title);
    setSize(500,500);
    setVisible(true);
    setLayout(null);
    addWindowListener( new WinAct(this) );

    File file=new File("C:\\123.mpg");
    player=Manager.createRealizedPlayer(new
MediaLocator(file.toURI().toURL()));

    vc=new volumeChange(player);
    vc.setLocation(320,370);
    getContentPane().add(vc);

    cpc=player.getControlPanelComponent();
    cpc.setBounds(50,370,260,30);
    getContentPane().add(cpc);

    visualWindow=player.getVisualComponent();
    visualWindow.setBounds(50,50,400,300);
    getContentPane().add(visualWindow);

  }
  public static void main(String[] args)throws Exception{
    test jf=new test("test");
  }
  static class WinAct extends WindowAdapter{
    private test jf;
    public WinAct(test tjf){
      jf=tjf;
    }
    public void windowClosing(WindowEvent e) {
      jf.player.stop();
      jf.player.deallocate();
      jf.dispose();
      System.exit(0);
    }
  }
}

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◆ From: 163.23.226.13
推 TonyQ:你是不是忘了layout的設定 ?.?
→ TonyQ:嗄 打完才看到是null layout ~
推 slalala:建議在MAIN的地方才將jf設 setVisiable
推 superlubu:應該是電腦太爛 XD 我試過跑沒有問題，可正常 display
推 superlubu:不過還是要等大概一秒才會見到東西出現
→ superlubu:另外... vc 根本沒有 call 過 setVisible 啊  XDDDD
→ privatewind:噗噗 是因為那時在找bug 才把那行用掉了 沒想到也可以
→ privatewind:所以就直接把不用setvisible(true) 的部份 給del了 囧
→ privatewind:感謝Slalala這樣的確就好了