Simple question on Embedding Java applets

[gasper91]

Hey,

I'm trying to embed a java applet I made that is a connect four game made with one class. I understand that you need

<APPLET CODE="ConnectFour.class" WIDTH="650" HEIGHT="400">
</APPLET>

and then inside the tags you need PARAM tags with parameters. What exactly do I need to put in for the parameters. Does this mean my private fields or what? I'm not sure what I'm doing here so if I'm lacking information than just tell me what you need and I'll do my best to let you know.

[doWhile]

See The APPLET Tag for more information on the applet tag and parameters.

[Norm]

What exactly do I need to put in for the parameters

The parameters can be read by the applet. See the applet method: getParameter??

Leave the .class off the code= attrbute. The value is supposed to be the class name not a file name.

[gasper91]

Hmm, I'm still not completely getting it. Is it possible that my connect four game shouldn't take any parameters? Here is the code:

import acm.graphics.*;
import acm.program.*;
import java.awt.event.*;
import java.util.*;
import java.awt.*;


public class ConnectFour extends StudentTestableGraphicsProgram
{
//~ Instance/static variables .............................................
//Game board dimensions
private static final int GAME_BOARD_WIDTH = 400;
private static final int GAME_BOARD_HEIGHT = 350;

//static size of the ovals used in the array
private static final int OVAL = 55;

//Array Dimensions
private static final int ROW = 6;
private static final int COLUMN = 7;

//Sets up the player's colors
private static final Color ONE_COLOR = Color.RED;
private static final Color TWO_COLOR = Color.BLUE;

//Creates a new array used for the game baord
private GOval[][] board = new GOval[ROW][COLUMN];

//Title
private GLabel connectFourTitle;

//During the game it is either player 1's turn,
//player 2's turn, or game over. So three
//booleans are created.
private boolean player1Turn;
private boolean player2Turn;
private boolean gameOver;

//Stores colors that are used to
//decide on a game winner
private Color color1;
private Color colorWin;
private Color colorWin2;
private Color colorWin3;
private Color colorWin4;

//Keeps a count to decide if there is a
//game winner.
private int sameColor;

//Status label changes as players turns switch
//and if the game is over.
private GLabel statusLabel;

//Initializes reset button
private GRect resetRect;
private GLabel resetLabel;
//~ Methods .................................................. .............

// ----------------------------------------------------------
/**
* Sets up the initial state of the application.
* This method implements the various methods created.
*
*/
public void init()
{
addMouseListeners();

//Basis initializations.
player1Turn = true;
player2Turn = false;
gameOver = false;

//Displays game board and title.
gameBoard();
gameTitle();

//Initializes the game status.
statusLabel = new GLabel("Red's turn", 475, 250);
statusLabel.setFont("Arial-bold-34");
statusLabel.setColor(ONE_COLOR);
add(statusLabel);

//Sets up reset button
resetRect = new GRect(480, 300, 138, 85);
resetRect.setColor(Color.BLACK);
resetRect.setFilled(true);
resetRect.setFillColor(Color.GREEN);
add(resetRect);

resetLabel = new GLabel("RESET", 485, 350);
resetLabel.setColor(Color.BLACK);
resetLabel.setFont("Arial-bold-38");
add(resetLabel);

}

// ----------------------------------------------------------
/**
* Places a game piece in the appropriate spot.
* @param e An object representing the mouse click event being handled
*/
public void mouseClicked(MouseEvent e)
{
//Only the column needs to be read when placing
//a game piece
int columnClick = (e.getX() - 82) / OVAL;

//Used for RESET button
int x = e.getX();
int y = e.getY();
GObject resetClicked = getElementAt(x, y);

//Calls resetGame method to clear board.
if ((resetClicked == resetRect) || (resetClicked == resetLabel))
{
resetGame();
}

//Determines where a game piece you be placed,
//calls the method to check for a win, and
//determines what the color the game piece should
//be.
if (player1Turn)
{
for (int row = 5; row >= 0; row--)
{
GOval drop = board[row][columnClick];
color1 = drop.getFillColor();

if (color1.equals(Color.WHITE))
{
drop.setFillColor(ONE_COLOR);
player1Turn = false;
player2Turn = true;
statusLabel.setLabel("Blue's Turn");
statusLabel.setColor(TWO_COLOR);
if (checkWin(ONE_COLOR))
{
gameOver = true;
statusLabel.setLabel("Red wins");
statusLabel.setColor(ONE_COLOR);
break;
}
break;
}
}
}
else if (player2Turn)
{
for (int row = 5; row >= 0; row--)
{
GOval drop = board[row][columnClick];
color1 = drop.getFillColor();
if (color1.equals(Color.WHITE))
{
drop.setFillColor(TWO_COLOR);
player1Turn = true;
player2Turn = false;
statusLabel.setLabel("Red's Turn");
statusLabel.setColor(ONE_COLOR);
if (checkWin(TWO_COLOR))
{
gameOver = true;
statusLabel.setLabel("Blue wins");
statusLabel.setColor(TWO_COLOR);
break;
}
break;
}
}
}

//Makes it so it is "no ones turn" if the game
//is over that way no more moves can be made.
if (gameOver)
{
player1Turn = false;
player2Turn = false;
}
}

/**
* This method sets up the game board.
* @return board returns the game board
*
*/
public GOval[][] gameBoard()
{
//Large yellow rectangle.
GRect rect = new GRect(75, 75, GAME_BOARD_WIDTH, GAME_BOARD_HEIGHT);
rect.setFilled(true);
rect.setColor(Color.BLACK);
rect.setFillColor(Color.YELLOW);
add(rect);

//Creates an array of white ovals to symbolize the slots.
for (int row = 0; row < ROW; row++)
{
for (int column = 0; column < COLUMN; column++)
{
int x = column * OVAL + 75;
int y = row * OVAL + 75;

GOval oval = new GOval(x + 7, y + 7, OVAL - 7, OVAL - 7);
oval.setFilled(true);
oval.setColor(Color.BLACK);
oval.setFillColor(Color.WHITE);
add(oval);

board[row][column] = oval;
}
}

return board;

}
/**
* Places a game title label.
* @return connectFour returns label.
*/
public GLabel gameTitle()
{
connectFourTitle = new GLabel("CONNECT FOUR", 140, 60);
connectFourTitle.setFont("Arial-bold-34");
add(connectFourTitle);

return connectFourTitle;
}

/**
* Checks to see if a player won.
* @param color enters a color to be checked for.
* @return true false winner or no winner.
*/
public boolean checkWin(Color color)
{
//Check for vertical win.
for (int row = 0; row < ROW; row++)
{
sameColor = 0;
for (int col = 0; col < COLUMN; col++)
{
colorWin = board[row][col].getFillColor();
if (colorWin.equals(color))
{
sameColor++;
if (sameColor == 4)
{
return true;
}
}
else
{
sameColor = 0;
}
}
}

//Check for horizontal win.
for (int col = 0; col < COLUMN; col++)
{
sameColor = 0;
for (int row = 0; row < ROW; row++)
{
colorWin = board[row][col].getFillColor();
if (colorWin.equals(color))
{
sameColor++;
if (sameColor == 4)
{
return true;
}
}
else
{
sameColor = 0;
}
}
}
//Check diagonal win with downward slope.
for (int row = 0; row < 3; row++)
{
for (int col = 0; col < 4; col++)
{
colorWin = board[row][col].getFillColor();
colorWin2 = board[row + 1][col + 1].getFillColor();
colorWin3 = board[row + 2][col + 2].getFillColor();
colorWin4 = board[row + 3][col + 3].getFillColor();
if (colorWin.equals(color) && colorWin2.equals(color) &&
colorWin3.equals(color) && colorWin4.equals(color))
{
return true;
}
}
}
//Check diagnoal win with positive slope.
for (int row = 3; row < 6; row++)
{
for (int col = 0; col < 4; col++)
{
colorWin = board[row][col].getFillColor();
colorWin2 = board[row - 1][col + 1].getFillColor();
colorWin3 = board[row - 2][col + 2].getFillColor();
colorWin4 = board[row - 3][col + 3].getFillColor();
if (colorWin.equals(color) && colorWin2.equals(color) &&
colorWin3.equals(color) && colorWin4.equals(color))
{
return true;
}
}
}

return false;

}

/**
* Resets the game.
*/
public void resetGame()
{
gameBoard();
statusLabel.setLabel("Red's Turn");
statusLabel.setColor(Color.RED);
gameOver = false;
player1Turn = true;
}

}

[Norm]

Is it possible that my connect four game shouldn't take any parameters

yes. Parameters allow you to tailor your program for a particular environment or execution. If there is nothing you need to tell your code about where it is or what it is to do, you don't need parameters.

[gasper91]

java.lang.NoClassDefFoundError: acm/program/StudentTestableGraphicsProgram
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknow n Source)
at sun.plugin2.applet.Applet2ClassLoader.findClass(Un known Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(U nknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Un known Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Un known Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unk nown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unk nown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionR unnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: acm.program.StudentTestableGraphicsProgram
at sun.plugin2.applet.Applet2ClassLoader.findClass(Un known Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(U nknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Un known Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Un known Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 13 more



This is what I'm getting, the java thing pops up when I try to run the applet online, but after the loading bar starts I get this error.

[Norm]

NoClassDefFoundError: acm/program/StudentTestableGraphicsProgram
The java program can not find the class referenced in the message.
You need to add the jar file that the class is in to the classpath for the java command:

java -classpath THEJARFILEHERE.jar;. YOURCLASSNAMEHERE

That was for programs.

For applets, add the jar file to the <APPLET tag's archive= attribute