I add components to contentPane, but JFrame still does not show them

Question

I converted a small game I was making from AWT to Swing.(The game is just MineSweeper.) I made all the necessary adjustments like, Button to JButton and add() to getContentPane().add(), but when I show the JFrame, it does not show any components that I added. I have run test programs to see if I am adding the components correctly and they work.
I print out the number of components contained in the frame by using getComponentCount() and the number is correct. It just will not show up in the JFrame. I have tried everything I can think of, no matter how strange and it still will not show the components.
I have attached all the code to the bottom of this message. Can someone please take a look and see what I am missing.
Thanks.
Here's the code. The main file is at the end and is the one causing the problems. All the rest is just support stuff and should not be relavent, but I included it in case I missed something there.
//Timer is just a custom timer
import java.util.Date;
public class Timer {
     Date curr;
     public Timer() {
          curr=new Date();
     public void start() {
          curr=new Date();
     public int getSeconds() {
          return (int)(((new Date().getTime())-curr.getTime())/1000);
//Cover subclasses JButton for initial look
import java.awt.*;
import javax.swing.*;
public class Cover extends JButton {
     Dimension size;
     public Cover() {
          super("");
          size=new Dimension(20,20);
          setSize(size);
     public Cover(String l) {
          super("");
          size=new Dimension(20,20);
          setSize(size);
     public void setSize(Dimension s) {
          super.setSize(size);
     public Dimension getPreferredSize() {
          return size.getSize();
     public Dimension getMinimumSize() {
          return size.getSize();
     public Dimension getMaximumSize() {
          return size.getSize();
//Flag subclasses JButton to flag a mine
import java.awt.*;
import javax.swing.*;
public class Flag extends JButton {
     Dimension size;
     public Flag() {
          super("F");
          size=new Dimension(20,20);
     public Flag(String l) {
          super("F");
          size=new Dimension(20,20);
     public void setSize(Dimension s) {
          super.setSize(size);
     public Dimension getPreferredSize() {
          return size.getSize();
     public Dimension getMinimumSize() {
          return size.getSize();
     public Dimension getMaximumSize() {
          return size.getSize();
//Reveal subclasses JPanel to show what's underneath
import java.awt.*;
import javax.swing.*;
public class Reveal extends JPanel {
     Dimension size;
     int number;
     Color color[];
     public Reveal(int n) {
          super();
          size=new Dimension(20,20);
          number=n;
          color=new Color[10];
          color[0]=Color.black;
          color[1]=Color.orange;
          color[2]=Color.cyan;
          color[3]=Color.yellow;
          color[4]=Color.green;
          color[5]=Color.magenta;
          color[6]=Color.blue;
          color[7]=Color.pink;
          color[8]=Color.darkGray;
          color[9]=Color.red;
          //for(int x=0;x<10;x++) {
          //     System.out.println(x+"="+color[x]);
          setBackground(Color.black);
     public void paintComponent(Graphics g) {
          int width=getWidth();
          int height=getHeight();
          FontMetrics fm=g.getFontMetrics();
          int fw=0;
          int fh=fm.getAscent();
          g.setColor(color[number]);
          if(number==9) {
               fw=fm.stringWidth("M");
               g.drawString("M",width/2-(fw/2),height/2+(fh/2));
          else if(number!=0) {
               fw=fm.stringWidth(""+number);
               g.drawString(""+number,width/2-(fw/2),height/2+(fh/2));
          g.setColor(Color.white);
          g.drawRect(1,1,width-2,height-2);
          //System.out.println("number="+number);
     public void setNumber(int n) {
          number=n;
     public int getNumber() {
          return number;
     public Dimension getPreferredSize() {
          return size.getSize();
     public Dimension getMinimumSize() {
          return size.getSize();
     public Dimension getMaximumSize() {
          return size.getSize();
//MineSweeper just launches the program and subclasses JFrame
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class MineSweeper extends JFrame implements ComponentListener {
     public MineSweeper(String s) {
          super(s);
          addComponentListener(this);
     public void quit() {
          System.exit(0);
     public void componentHidden(ComponentEvent e){}
     public void componentMoved(ComponentEvent e){}
     public void componentResized(ComponentEvent e){
          System.out.println("resized");
          MineSweeper temp=(MineSweeper)e.getSource();
          System.out.println("count="+temp.getContentPane().getComponentCount());
     public void componentShown(ComponentEvent e){}
     public static void main(String args[]) {
          MineSweeper t=new MineSweeper("Inside Moves");
          t.addWindowListener(new WindowAdapter() {
               public void windowClosing(WindowEvent e) {
                    System.exit(0);
          GameManager manager=new GameManager(t);
//GameManager is the main program. This is where the JFrame is realized
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
public class GameManager implements MouseListener, ActionListener, Runnable {
     JPanel display;
     JPanel gameInfo;
     MineSweeper screen;
     JButton reset;
     JTextField tMine,time;
     Container pane;
     int clickX,clickY;
     int minesLeft;
     int gridX[],gridY[],mine[];
     static final int MAX_X=30;
     static final int MAX_Y=24;
     static final int MAX_MINE=667;
     JComponent grid[][];
     int board[][];
     int number[][];
     final static int OB=64;
     final static int BLANK=0;
     final static int MINE=1;
     final static int REVEAL=128;
     int level;
     final static int EASY=0;
     final static int MEDIUM=1;
     final static int HARD=2;
     final static int CUSTOM=3;
     int state;
     final static int START=1;
     final static int PLAYING=2;
     final static int DONE=3;
     Timer timer;
     int timeDisp;
     public GameManager(MineSweeper s) {
          screen=s;
          pane=screen.getContentPane();
          pane.setLayout(new BorderLayout());
          display=new JPanel();
          gameInfo=new JPanel(new GridLayout(1,3));
          reset=new JButton("Reset");
          tMine=new JTextField(20);
          time=new JTextField("0",20);
          grid=new JComponent[MAX_X+2][MAX_Y+2];
          board=new int[MAX_X+2][MAX_Y+2];
          number=new int[MAX_X+2][MAX_Y+2];
          gridX=new int[4];
          gridY=new int[4];
          mine=new int[4];
          level=EASY;
          gridX[0]=8;
          gridY[0]=8;
          mine[0]=10;
          gridX[1]=16;
          gridY[1]=16;
          mine[1]=40;
          gridX[2]=30;
          gridY[2]=16;
          mine[2]=99;
          gridX[3]=0;
          gridY[3]=0;
          mine[3]=0;
          minesLeft=mine[level];
          tMine.setText(""+minesLeft);
          state=START;
          timer=new Timer();
          reset.addActionListener(this);
          setup();
          Thread t=new Thread(this);
          t.start();
          /*System.out.println("count="+pane.getComponentCount());
          Component cc[]=pane.getComponents();
          for(int i=0;i<cc.length;i++) {
               System.out.println("cc="+cc);
     public void setup() {
          boolean done;
          for(int x=0;x<=gridX[level]+1;x++) {
               for(int y=0;y<=gridY[level]+1;y++) {
                    if(x==0 || x==gridX[level]+1 || y==0 || y==gridY[level]+1) {
                         board[x][y]=OB;
                         number[x][y]=-1;
                    else {
                         board[x][y]=BLANK;
          for(int i=0;i<mine[level];i++) {
               done=false;
               while(!done) {
                    int x=(int)((Math.random()*gridX[level])+1.0);
                    int y=(int)((Math.random()*gridY[level])+1.0);
                    if(board[x][y]==BLANK) {
                         board[x][y]=MINE;
                         done=true;
                         //System.out.println("Mine x="+x+" y="+y);
          for(int y=1;y<=gridY[level];y++) {
               System.out.print("\n");
               for(int x=1;x<=gridX[level];x++) {
                    number[x][y]=0;
                    if(board[x][y]==MINE) {
                         number[x][y]=9;
                         System.out.print(""+number[x][y]);
                         continue;
                    else {
                         //System.out.println("For board pos x="+x+" y="+y);
                         for(int i=-1;i<=1;i++) {
                              for(int j=-1;j<=1;j++) {
                                   //System.out.print(""+board[x+i][y+j]);
                                   if(board[x+i][y+j]!=OB && board[x][y]==BLANK) {
                                        number[x][y]+=board[x+i][y+j];
                              //System.out.print("\n");
                         System.out.print(""+number[x][y]);
          System.out.print("\n");
          screen.setVisible(false);
          display.removeAll();
          pane.removeAll();
          display.setLayout(new GridLayout(gridY[level],gridX[level]));
          for(int y=1;y<=gridY[level];y++) {
               for(int x=1;x<=gridX[level];x++) {
                    Cover temp=new Cover();
                    //System.out.println("new button="+temp);
                    grid[x][y]=temp;
                    //System.out.println("display="+display.add(temp));
                    //display.add(temp);
                    temp.addMouseListener(this);
          //System.out.println("count="+display.getComponentCount());
          screen.setSize(gridX[level]*20,gridY[level]*20+30);
          pane.add(gameInfo,BorderLayout.NORTH);
          pane.add(display,BorderLayout.CENTER);
          minesLeft=mine[level];
          timeDisp=0;
          tMine.setText(""+minesLeft);
          time.setText(""+timeDisp);
          state=START;
          //System.out.println("gameInfo="+gameInfo);
          //System.out.println("display="+display);
          //screen.pack();
          screen.setVisible(true);
     void revealAround(int x,int y) {
          int index;
          Reveal tempRev=new Reveal(number[x][y]);
          grid[x][y]=tempRev;
          board[x][y]=(board[x][y]|REVEAL);
          index=(x-1)+((y-1)*gridX[level]);
          display.remove(index);
          display.add(tempRev,index);
          if(number[x][y]==0) {
               for(int i=-1;i<=1;i++) {
                    for(int j=-1;j<=1;j++) {
                         if(!(i==0 && j==0)) {
                              if((board[x+i][y+j]&REVEAL)!=REVEAL && board[x+i][y+j]!=OB) {
                                   revealAround(x+i,y+j);
     void startTimer() {
          timer.start();
     public void run() {
          while(true) {
               if(state==PLAYING) {
                    if(timer.getSeconds()>timeDisp) {
                         timeDisp=timer.getSeconds();
                         time.setText(""+timeDisp);
               else {
                    try {
                         Thread.sleep(1000);
                    catch (InterruptedException e) {
     public void actionPerformed(ActionEvent e) {
          if(e.getActionCommand().equals("Reset")) {
               setup();
     public void mouseClicked(MouseEvent e) {
          if(state==START) {
               startTimer();
               state=PLAYING;
          if(state==PLAYING) {
               Component tempComp=(Component)e.getSource();
               boolean found=false;
               int index=0;
               int buttonPressed=e.getModifiers();
               for(int x=1;x<=gridX[level];x++) {
                    if(found) {
                         break;
                    for(int y=1;y<=gridY[level];y++) {
                         if(tempComp==grid[x][y]) {
                              clickX=x;
                              clickY=y;
                              found=true;
                              break;
               index=(clickX-1)+((clickY-1)*gridX[level]);
               if(buttonPressed==InputEvent.BUTTON1_MASK && !(grid[clickX][clickY] instanceof Flag)) {
                    Reveal tempRev=new Reveal(number[clickX][clickY]);
                    grid[clickX][clickY]=tempRev;
                    board[clickX][clickY]=board[clickX][clickY]|REVEAL;
                    display.remove(index);
                    display.add(tempRev,index);
               else if(buttonPressed==InputEvent.BUTTON3_MASK) {
                    if(display.getComponent(index) instanceof Cover) {
                         Flag tempFlag=new Flag();
                         grid[clickX][clickY]=tempFlag;
                         display.remove(index);
                         display.add(tempFlag,index);
                         tempFlag.addMouseListener(this);
                         minesLeft--;
                    else if(display.getComponent(index) instanceof Flag) {
                         Cover tempCov=new Cover();
                         grid[clickX][clickY]=tempCov;
                         display.remove(index);
                         display.add(tempCov,index);
                         tempCov.addMouseListener(this);
                         minesLeft++;
                    tMine.setText(""+minesLeft);
               if(number[clickX][clickY]==0) {
                    revealAround(clickX,clickY);
               screen.setVisible(true);
     public void mousePressed(MouseEvent e) {}
     public void mouseReleased(MouseEvent e) {}
     public void mouseEntered(MouseEvent e) {}
     public void mouseExited(MouseEvent e) {}

Answer 1

setBounds() is only used for absolute positioning. I
am using layout managers, so it should no be used.
Thanks for you reply.Oh I get I did not look at your source code enought... can you post only the part that is bugy!?!?!
JRG