Java Minesweeper

Question

this is my first swing app(i made it to help me better understand how this stuff works), and i have a few problems i need help fixing:
1: buttons are to large
2: a 3x3 field does not setup right
3: uses chn.util's Console IO for data input
4: want to be able to flag possilbe mines
i pretty much want my code looked through and if anyone sees anything pointless or something that might cause it to crash, let me know.
note: im still not entirely sure what main does... i just copied it from the tutorial page, if anyone can explain that ild apreciate that also
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.Random;
import java.util.ArrayList;
import chn.util.*;
import java.net.URL;
public class MineSweeper implements ActionListener
     int dimensions;
     JFrame MineSweeperFrame;
     JPanel MineSweeperPanel;
     JButton defaultBut;
     JButton[][] Buttons;
     JLabel[] labs;
     JLabel MineSweeperLabel;
     Location[][] Locations;
     ArrayList mineList;
     JFrame lossesFrame;
     JPanel lossesPanel;
     JLabel lossesLabel;
     static int lossCount;
     int numMines;
     public MineSweeper()
          ConsoleIO kb = new ConsoleIO();
          numMines=0;
          dimensions=0;
          while(dimensions<=0)
           System.out.println("How many columns/rows?");
           dimensions = kb.readInt();
          while(numMines>dimensions*dimensions -1 || numMines <= 0)
           System.out.println("How many Mines?");
           numMines = kb.readInt();
           if(numMines>dimensions*dimensions)
           System.out.println("Error: too many Mines.("+numMines+(numMines<dimensions*dimensions)+")");
           if(numMines<=0)
           System.out.println("Error: not enough Mines.("+numMines + (boolean)(numMines>=0) +")");
          setMines();
          MineSweeperLabel = new JLabel(" ");
          MineSweeperFrame = new JFrame("My Mine Sweeper");
          MineSweeperFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          MineSweeperFrame.setSize(new Dimension(250,200));
          MineSweeperPanel = new JPanel(new GridLayout(dimensions+1,dimensions));
          addWidgets();     
          MineSweeperFrame.getRootPane().setDefaultButton(defaultBut);
          MineSweeperFrame.getContentPane().add(MineSweeperPanel, BorderLayout.CENTER);
          MineSweeperFrame.pack();
          MineSweeperFrame.setVisible(true);
          lossesLabel = new JLabel("You Loose!");
          lossesFrame = new JFrame("Game Over");
          lossesFrame.setSize(new Dimension(300,500));
          lossesPanel = new JPanel(new GridLayout(1,2));
          lossesPanel.add(lossesLabel);
          lossesFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          lossesFrame.getContentPane().add(lossesPanel, BorderLayout.CENTER);     
          lossesFrame.pack();
     public void clearAllZeros(Location loc)//sets all buttons associated w/ a 0 to 0
          if(isNoConflict(loc))
               int x = loc.getX();
               int y = loc.getY();
               Buttons[x][y].setText("");
               Buttons[x][y].setEnabled(false);
               loc.setChecked(true);
               if(x<Locations.length-1 && !(Locations[x+1][y].isChecked()))
               clearAllZeros(Locations[x+1][y]);
               if(y<Locations.length-1 && !(Locations[x][y+1].isChecked()))
               clearAllZeros(Locations[x][y+1]);
               if(x>0 && !(Locations[x-1][y].isChecked()))
               clearAllZeros(Locations[x-1][y]);
               if(y>0 && !(Locations[x][y-1].isChecked()))
               clearAllZeros(Locations[x][y-1]);
               if(x<Locations.length-1 && y<Locations.length-1 && !(Locations[x+1][y+1].isChecked()))
               clearAllZeros(Locations[x+1][y+1]);
               if(x<Locations.length-1 && y>0 && !(Locations[x+1][y-1].isChecked()))
               clearAllZeros(Locations[x+1][y-1]);
               if(x>0 && y<Locations.length-1 && !(Locations[x-1][y+1].isChecked()))
               clearAllZeros(Locations[x-1][y+1]);
               if(x>0 && y>0 && !(Locations[x-1][y-1].isChecked()))
               clearAllZeros(Locations[x-1][y-1]);
               return;
          return;
     public boolean isNoConflict(Location loc)
          if(loc.nearMine() && !(loc.isMine()))
               Buttons[loc.getX()][loc.getY()].setText(""+loc.getTNum());
               Buttons[loc.getX()][loc.getY()].setMargin(new Insets(5, 5, 5, 5));
               Locations[loc.getX()][loc.getY()].setChecked(true);
               return false;
          else if(loc.isMine())
          return false;
          else return true;
     public void setMines()//randomly creates numMines mines(locations of mines are stored in mineList)
          mineList = new ArrayList();
          Locations = new Location[dimensions][dimensions];
          for(int i = 0; i < Locations.length;i++)
          for(int j = 0; j < Locations.length;j++)
          Locations[i][j] = new Location(i,j);
          Random r = new Random();
          int i = 0;
          int r1;
          int r2;
          while(i<numMines)
           r1=r.nextInt(dimensions);
           r2=r.nextInt(dimensions);
           if(!(Locations[r1][r2].isMine()))
                Locations[r1][r2].setMine();
                mineList.add(Locations[r1][r2]);
                i++;
          for(int j = 0; j<Locations.length;j++)
          for(int k=0; k<Locations.length;k++)
          setMineNeighbors(j,k);
     public void setMineNeighbors(int first, int second)
       int MineNeighbors = numMineNeighbors(first,second);
       for(int j = 0; j<MineNeighbors;j++)
       //if((isMine[((Location)nonMineNeighbors.get(j)).getX()][((Location)nonMineNeighbors.get(j)).getY()].isMine()))
        Locations[first][second].numPlusPlus();
        Locations[first][second].setNearMine();
     private class Location
          private boolean mine;
          private boolean locChecked;
          private boolean nearMine;
          private int myX;
          private int myY;
          private int myNum;
          public Location(int x, int y)
               nearMine=false;
               myNum =0;
               mine=false;
               locChecked = false;
               myX=x;
               myY=y;
          public boolean nearMine()
               return nearMine;
          public void setNearMine()
               nearMine=true;
          public void numPlusPlus()
               myNum++;
          public String getTNum()
               if(getNum()==1)
               return "<html><font color=blue>"+getNum()+"</font></html>";
               if(getNum()==2)
               return "<html><font color=green>"+getNum()+"</font></html>";
               if(getNum()==3)
               return "<html><font color=orange>"+getNum()+"</font></html>";
               if(getNum()==4)
               return "<html><font color=red>"+getNum()+"</font></html>";
               if(getNum()==5)
               return "<html><font color=purple>"+getNum()+"</font></html>";
               if(getNum()==6)
               return "<html><font color=brown>"+getNum()+"</font></html>";
               if(getNum()==7)
               return "<html><font color=black>"+getNum()+"</font></html>";
               if(getNum()==8)
               return "<html><font color=yellow>"+getNum()+"</font></html>";
               else
               return ""+getNum();
          public int getNum()
               return myNum;
          public int getX()
               return myX;
          public void setMine()
               mine =true;
          public boolean isMine()
               return mine;
          public int getY()
               return myY;
          public boolean isChecked()
               return locChecked;
          public void setChecked(boolean bol)
               locChecked = bol;
          public void resetStatus()
               for(int i = 0; i < Locations.length; i++)
               for(int j = 0; j < Locations.length; j++)
                Locations[i][j].setChecked(false);
                Buttons[i][j].setText("");
     public int numMineNeighbors(int firstNum, int secondNum)
          int num =0;
          if(firstNum < 0 || firstNum > Locations.length || secondNum < 0 || secondNum > Locations.length)
          return 0;
          if(!(firstNum+1 >= Locations.length))
          if(Locations[firstNum+1][secondNum].isMine())
          num++;
          if(!(secondNum+1 >= Locations.length))
          if(Locations[firstNum][secondNum+1].isMine())
          num++;
          if(!(secondNum-1 < 0))
          if(Locations[firstNum][secondNum-1].isMine())
          num++;
          if(!(firstNum-1 < 0))
          if(Locations[firstNum-1][secondNum].isMine())
          num++;
          if(!(firstNum+1 >= Locations.length || secondNum+1 >= Locations.length))
          if(Locations[firstNum+1][secondNum+1].isMine())
          num++;
          if(!(firstNum+1 >= Locations.length || secondNum-1 < 0))
          if(Locations[firstNum+1][secondNum-1].isMine())
          num++;
          if(!(firstNum-1 < 0 || secondNum+1 >= Locations.length))
          if(Locations[firstNum-1][secondNum+1].isMine())
          num++;
          if(!(firstNum-1 < 0 || secondNum-1 < 0))
          if(Locations[firstNum-1][secondNum-1].isMine())
          num++;
          return num;
     public static void createAndShowGUI()
          JFrame.setDefaultLookAndFeelDecorated(true);
          new MineSweeper();
     public void actionPerformed(ActionEvent a)
          String nums = a.getActionCommand();
          if(nums.equals("+")||nums.equals("-"))
               if(nums.equals("-"))
               defaultBut.setText("+");
               for(int b = 0; b<Buttons.length; b++)
               for(int c = 0; c<Buttons.length; c++)
                Buttons[b][c].setText("");
                Buttons[b][c].setEnabled(true);
                Locations[b][c].setChecked(false);
               setMines();
          String fnum="";
          String snum="";
          if(nums.length()>=3)
           int numf=0;
           int numss=0;
           fnum = nums.substring(0,nums.indexOf(" "));
           snum = nums.substring(nums.indexOf(" ")+1,nums.length());
           /*numf = nums.substring(0,nums.indexOf(" ")).length()-1;
           numss = nums.substring(nums.indexOf(" "),nums.length()-1).length()-1;
           for(int i =0; i < fnum.length(); i++)
           numf += ((((int)fnum.charAt(i))-48)*Math.pow(10,fnum.length()-i-1));
           for(int j =0; j < snum.length(); j++)
           numss += ((((int)snum.charAt(j))-48)*Math.pow(10,snum.length()-j-1));
          if(Locations[numf][numss].isMine())
               defaultBut.setText("-");
               for(int f =0; f<Buttons.length;f++)
              for(int g =0; g<Buttons.length;g++)
              Buttons[f][g].setEnabled(false);
               lossCount++;
               lossesLabel.setText("Losses: " +lossCount);
               lossesFrame.setVisible(true);
          if(numf >= 0 && numss >= 0 && numf <dimensions && numss < dimensions)
           Buttons[numf][numss].setText(Locations[numf][numss].getTNum() +"");
           Buttons[numf][numss].setMargin(new Insets(5, 5, 5, 5));
           Locations[numf][numss].setChecked(true);
           if(Locations[numf][numss].getNum()==0)
           clearAllZeros(Locations[numf][numss]);
           if(Locations[numf][numss].isMine())
           Buttons[numf][numss].setText("�");
          /*System.out.println((((int)fnum)-48) + "" + (((int)snum)-48));
          System.out.println(a.getActionCommand());*/     
          int count =0;
          for(int d =0; d<Locations.length;d++)
          for(int e =0; e<Locations.length;e++)
          if(!(Locations[d][e].isChecked()))
          count++;
          System.out.println("num unchecked "+(count-numMines));
          if(count==numMines)
               lossesLabel.setText("You Win!");
               lossesFrame.setVisible(true);
               System.out.println("You Win!");
     private void addWidgets()
          MineSweeperPanel.add(MineSweeperLabel);
          int ammount = dimensions-2;
          for(int i = 0; i<ammount/2-1; i++)
          MineSweeperPanel.add(new JLabel(""));
          defaultBut = new JButton("+");
          defaultBut.setMargin(new Insets(5, 5, 5, 5));
          defaultBut.addActionListener(this);
          MineSweeperPanel.add(defaultBut);
          if(dimensions%2==0)
          for(int i = 0; i<ammount/2+1; i++)
          MineSweeperPanel.add(new JLabel(""));
          if(dimensions%2!=0)
          for(int i = 0; i<ammount/2+2; i++)
          MineSweeperPanel.add(new JLabel(""));
          Buttons = new JButton[dimensions][dimensions];
          /*for(int i = 0; i < but1.length;i++)
           for(int j = 0; j < but1.length; j++)
                String first="";
               String last="";
                for(int k = 0; k <= i;k++)//adds i+1 \0 to string first(buttons[0][0]= "\0 \0",buttons[1][1]= "\0\0 \0\0")
                 first += "\0";
                 for(int l = 0; l <= j;l++)//adds j+1 \0 to string last
                 last += "\0";
                 but1[i][j]= new JButton(first + " " + last);
                 but1[i][j].addActionListener(this);
                 pan1.add(but1[i][j]);
          Buttons = new JButton[dimensions][dimensions];
          for(int i = 0; i < Buttons.length;i++)
           for(int j = 0; j < Buttons.length; j++)
            Buttons[i][j] = new JButton("");
            Buttons[i][j].setMaximumSize(new Dimension(5,5));
            Buttons[i][j].setActionCommand(i + " " + j);
            Buttons[i][j].addActionListener(this);
            defaultBut.setMargin(new Insets(5, 5, 5, 5));
            MineSweeperPanel.add(Buttons[i][j]);
     public static void main(String[] args)
       javax.swing.SwingUtilities.invokeLater(new Runnable()
                     public void run()
                         createAndShowGUI();
}

Answer 1

to make a (very) simple jar, run the JarMaker code in reply #3 here
http://forum.java.sun.com/thread.jspa?forumID=54&threadID=596973
(simple in the sense, it will only work under the simplest of conditions)
after you copy/paste it, you need to include
import java.awt.*;
before compiling (missed that line when posted)
this must be run in the same directory as minesweeper.java.
instructions are on the gui when run.
basically - you check the checkboxes for all the files you want to include in
the jar, and you also select the radio button for the .class file that contains 'main'
this only works with all files in the one directory, so if you have e.g. images in
images/flag.gif, they will need to go into the same directory as the minesweeper.java file,
and the minesweeper.java file modified - so do this with a backup copy of
your program in a temp directory,leaving the original unmodified.
if the jar file is successfully made, double-click it, see how it goes. Then move the
Minesweeper.jar file to some other directory, double-click and see if it works OK there.
Once you see the end result, you can go back to the jar docs and see if they
make any more sense, and if so, you can do it from the command prompt.
final point
if you have images, your code needs to get/load them as a resource e.g.
Image image = javax.imageio.ImageIO.read(new java.net.URL(getClass().getResource("Save.gif"), "Save.gif"));