E:ShareJustApps_source_updatedJustApps_source_updated>javac justapps.java
.MCGameScheduler.java:225: cannot resolve symbol
symbol  : method setVisible  (boolean)
location: class MCGame.Scheduler
      this.setVisible(false);
      ^
1 error

已经设置好classpath。

scheduler.java的代码如下：
package MCGame;

import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;

import javax.swing.filechooser.FileFilter;
import java.io.*;
import java.util.*;

import Common.*;

public class Scheduler implements ActionListener {
  private JButton LoadButton;
  private JButton playButton;
  private JButton goback;
  private JButton gonext;
  private JButton realtimeplayButton;
  private JButton realtimestopButton;
  private JButton realtimesaveButton;
  private JButton realtimereturntonewpieceButton;
  private JButton realtimequitjustappsButton;
  private JButton realtimejustappsButton;
  private File filename1;
  private File fileget;

  private Interface interfaceframe;
  private ComposingDialog dialog;
  private RealTimeFrame realtime;

  private ComposerSignaller signal;
  
  
  public Scheduler(ComposerSignaller signaller) {
    signal = signaller;
    interfaceframe = new Interface(signal);

    //Load Button
    LoadButton = new JButton("Load");
    interfaceframe.getControlPanel().add(LoadButton);
    LoadButton.addActionListener(this);

    playButton = new JButton("COMPOSE  NOW");
    interfaceframe.getControlPanel().add(playButton);
    playButton.addActionListener(this);

    interfaceframe.show();
  }

  public void actionPerformed(ActionEvent evt) {
    Object source = evt.getSource();
    if (source == playButton) {
      System.out.println("playButton action performed");
      interfaceframe.setVisible(false);
      // if (dialog == null){ // first time
        dialog = new ComposingDialog(interfaceframe);
        goback = new JButton("Back");
        gonext = new JButton("Next");

        goback.addActionListener(this);
        gonext.addActionListener(this);

        dialog.getControlPanel().add(goback);
        dialog.getControlPanel().add(gonext);
        System.out.println("new dialog");
      // }

      dialog.start();
      // Pong added
      dialog.startCompose(); // From Pong: modify the Composer constructor to pass voices/instruments information to the composer
      System.out.println("playButton action performedaa");
    }
    else if (source == LoadButton){
      JFileChooser chooser = new JFileChooser();
      chooser.setCurrentDirectory(new File("."));
      chooser.setFileFilter(new FileFilter() {
        public boolean accept(File f) {
          return f.getName().toLowerCase()
                  .endsWith(".mcg")
                  || f.isDirectory();
        }
        public String getDescription() {
          return "Musical Composing Game Score Files";
        }
      });
      int r = chooser.showOpenDialog(interfaceframe);
      if ( r == JFileChooser.APPROVE_OPTION ) {
        fileget = chooser.getSelectedFile();
        System.out.println("file = "+fileget);
        Score score;
        try {
          ObjectInputStream in = new ObjectInputStream(new FileInputStream(fileget));
          score = (Score) in.readObject();
          interfaceframe.setVisible(false);
          gotoRealTimePage(score);
        } catch (IOException e2) {
          System.out.println("get file IOException: " + e2);
        } catch (ClassNotFoundException e3) {
          System.out.println("get file ClassNotFoundExcepetion " + e3);
        }
      } else if ( r == JFileChooser.CANCEL_OPTION) {
        System.out.println("Cancelled");
      }
/*
      JFileChooser chooser = new JFileChooser();
      chooser.setCurrentDirectory(new File("."));
      chooser.setFileFilter(new FileFilter()
      {  public boolean accept(File f)
         {  return f.getName().toLowerCase()
                    .endsWith(".txt")       // From Pong: Make it quick!
                    || f.isDirectory();
         }
         public String getDescription()
         { return "Txt Files"; }
      });
      int r = chooser.showOpenDialog(interfaceframe);
      if (r == JFileChooser.APPROVE_OPTION)
      { // filename = chooser.getSelectedFile().getPath();
           //scanZipFile();
         fileget = chooser.getSelectedFile();
      }

      System.out.println(fileget);
*/
    }
    else if (source == goback){        //Back to Input Stage
      dialog.dispose();
      interfaceframe.setVisible(true);
      //Composer.scoreOne.clearAll();
      //Composer.scoreOne = new Score(256, 120,4,1,2,0);
      //System.out.println("Composer, num_sentence=" + Composer.scoreOne.voiceList[0].getNumSentence());
      // ShowInput();
    }
    else if (source == gonext){       //Go to Real Time Page
      dialog.dispose();
      gotoRealTimePage(dialog.getScore());
    }
    else if (source == realtimeplayButton){
      System.out.println("Play Now");
      realtimeplayButton.setEnabled(false);
      //dialog.getScore().reset();                                      // reset the score from dialog
      realtime.getScore().reset();
      realtime.playScore();
    }
    else if (source == realtimestopButton){
      System.out.println("Reset");
      realtimeplayButton.setEnabled(true);
      realtime.stopAudio();
      //dialog.getScore().reset();                                      // reset the score from dialog
      realtime.getScore().reset();
      realtime.initAudio();                                           // init audio after playing the score
      realtime.resetSetting();                                        // restore interface setting
      // reset realtimepage setting?
    }
    else if (source == realtimesaveButton){
      //System.out.println("Save");
      JFileChooser chooser = new JFileChooser();
      chooser.setCurrentDirectory(new File("."));
      chooser.setFileFilter(new FileFilter() {
        public boolean accept(File f) {
          return f.getName().toLowerCase().endsWith(".mcg") || f.isDirectory();
        }
        public String getDescription() {
          return "Musical Composing Game Score Files";
        }
      });
      int r = chooser.showSaveDialog(realtime);
      if (r == JFileChooser.APPROVE_OPTION) {
        filename1 = chooser.getSelectedFile();
        //System.out.println(filename1);
        try {
          ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(filename1));
          out.writeObject(dialog.getScore());
          out.close();
        } catch (IOException e) {
          System.out.println("IOExceptionO " + e);
        }
      }
    }
    else if (source == realtimequitjustappsButton){
      System.exit(0);
    }
    else if (source == realtimejustappsButton){
      this.setVisible(false);
      }
    else if (source == realtimereturntonewpieceButton){
      }
  }

  private void gotoRealTimePage(Score iscore) {
    realtime = new RealTimeFrame( iscore,getInstrList(),interfaceframe.getMajorMinor() );

    realtimeplayButton = new JButton(" Play ");
    realtimeplayButton.addActionListener(this);
    realtime.getControlPanel().add(realtimeplayButton);

    realtimestopButton = new JButton(" Reset ");
    realtimestopButton.addActionListener(this);
    realtime.getControlPanel().add(realtimestopButton);

    realtimesaveButton = new JButton(" Save ");
    realtimesaveButton.addActionListener(this);
    realtime.getControlPanel().add(realtimesaveButton);

    realtimereturntonewpieceButton = new JButton(" Return to New Piece ");
    realtimereturntonewpieceButton.addActionListener(this);
    realtime.getControlPanel().add(realtimereturntonewpieceButton);

    realtimequitjustappsButton = new JButton(" Quit JustApps ");
    realtimequitjustappsButton.addActionListener(this);
    realtime.getControlPanel().add(realtimequitjustappsButton);

    realtimejustappsButton = new JButton(" JustApps ");
    realtimejustappsButton.addActionListener(this);
    realtime.getControlPanel().add(realtimejustappsButton);
    

    realtime.start();
    try {
      Thread.sleep(500);
    } catch (InterruptedException e) {
    }
    getInterfaceParamToRealFrame();
    realtime.initAudio();                                           // init audio after playing the score
    realtime.resetSetting();                                        // restore interface setting
  }

  private void getInterfaceParamToDialog() {                          // Transition from Interface to Dialog
  }

  private void getInterfaceParamToRealFrame() {                       // Transition from Dialog to RealTime
    // get from interfaceframe
    int SF  = interfaceframe.getSampling();
    int BPS = interfaceframe.getBitperSample();
    int NCh = interfaceframe.getChannel();
    int AuQ = interfaceframe.getAudioQuality();
    // set to RealTimeFrame
    realtime.setAudio(SF, BPS, NCh, AuQ);
  }
  public InstrList getInstrList() {
    return interfaceframe.getInstrList();
  }
}

this.setVisible(false);
改成
interfaceframe.setVisible(false);
看看
。。。
Scheduler类没有setVisible方法

realtimejustappsButton.setVisible(false);