Thread: How to Java code onto Eclipse and make it work?

Hello guys,

I am confused as to how copy code for a game, Connect 4, onto Eclipse and make it work.
The problem is I am not sure whether to create a new 'Package' and paste the code there or make a 'Class' and paste it there or whether it's a combination of both.

Or maybe I need an interface....

Here is the code:

<package Default;   import java.awt.BorderLayout; import java.awt.Color; import java.awt.Container; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.Random; import javax.swing.BorderFactory; import javax.swing.ButtonGroup; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JRadioButton;   public class C4Options implements ActionListener {   private JFrame optionsWindow; private Random randomNo; public String randomColor;   private JRadioButton[] optionButton1; private JRadioButton[] optionButton2; private JRadioButton[] optionButton3; private JRadioButton[] optionButton4; private JRadioButton[] optionButton5; private JRadioButton[] optionButton6;  	C4Main main;	C4Check check;   public String previousPlayer1PieceColour; public String previousPlayer2PieceColour; public String previousBoardColour; public String previousPlayer1PieceType; public String previousPlayer2PieceType; public String previousGameType;   // make all components public C4Options(C4Main main, C4Check check) { this.main = main; this.check = check;   // initiate previous setting variables	previousPlayer1PieceColour = main.pieceColourPlayer1;	previousPlayer2PieceColour = main.pieceColourPlayer2;	previousBoardColour = main.boardColour;	previousPlayer1PieceType = main.pieceTypePlayer1;	previousPlayer2PieceType = main.pieceTypePlayer2;	previousGameType = main.gameType;   // make the window	optionsWindow = new JFrame("Options"); Container content = optionsWindow.getContentPane(); JPanel controlArea = new JPanel(new GridLayout(2, 4));	optionButton1 = new JRadioButton[10];	optionButton2 = new JRadioButton[10];	optionButton3 = new JRadioButton[10];	optionButton4 = new JRadioButton[5];	optionButton5 = new JRadioButton[5];	optionButton6 = new JRadioButton[2];   // radio button options in array   String[] pColorsPlayer1 = { "Red", "Orange", "Yellow", "Green", "Blue", "Purple", "Pink", "White", "Black", "Random" };	controlArea.add(new choicePanel("Piece Colour Player 1:",	pColorsPlayer1, optionButton1));   String[] pColorsPlayer2 = { "Red ", "Orange ", "Yellow ", "Green ", "Blue ", "Purple ", "Pink ", "White ", "Black ", "Random " };	controlArea.add(new choicePanel("Piece Colour Player 2:",	pColorsPlayer2, optionButton2));   String[] bColor = { "Red Board", "Orange Board", "Yellow Board", "Green Board", "Blue Board", "Purple Board", "Pink Board", "White Board", "Black Board", "Random Board" };	controlArea	.add(new choicePanel("Board Colour:", bColor, optionButton3));   String[] pTypePlayer1 = { "Circle", "Square", "Triangle", "Star", "Random " };	controlArea.add(new choicePanel("Piece Type Player 1:", pTypePlayer1,	optionButton4));   String[] pTypePlayer2 = { "Circle ", "Square ", "Triangle ", "Star ", "Random " };	controlArea.add(new choicePanel("Piece Type Player 2:", pTypePlayer2,	optionButton5));   String[] gameType = { "Player v Player", "Player v Comp" };	controlArea.add(new choicePanel("Game Type:", gameType, optionButton6));   // button panel JPanel buttonPane = new JPanel();	buttonPane.setLayout(new FlowLayout());	buttonPane.setPreferredSize(new Dimension(300, 40));	buttonPane.setBackground(Color.lightGray); // Color.lightGray // buttonPane.setBorder(BorderFactory.createLineBorder(Color.black));   // make buttons JButton okButton = new JButton("Ok", null); JButton cancelButton = new JButton("Cancel", null);   // make action commands	okButton.setActionCommand("ok");	cancelButton.setActionCommand("cancel");   // add listeners	okButton.addActionListener(this);	cancelButton.addActionListener(this);   // add hover over text	okButton.setToolTipText("Apply changes");	cancelButton.setToolTipText("Cancel any changes made");   // add buttons	buttonPane.add(okButton);	buttonPane.add(cancelButton);	content.add(buttonPane, BorderLayout.SOUTH);   for (int i = 0; i < optionButton1.length; i++) {	optionButton1[i].addActionListener(this); } for (int i = 0; i < optionButton2.length; i++) {	optionButton2[i].addActionListener(this); } for (int i = 0; i < optionButton3.length; i++) {	optionButton3[i].addActionListener(this); } for (int i = 0; i < optionButton4.length; i++) {	optionButton4[i].addActionListener(this); } for (int i = 0; i < optionButton5.length; i++) {	optionButton5[i].addActionListener(this); } for (int i = 0; i < optionButton6.length; i++) {	optionButton6[i].addActionListener(this); }  	setSelected();	unselect();	content.add(controlArea, BorderLayout.CENTER);	optionsWindow.setSize(400, 500);	optionsWindow.setLocationRelativeTo(null);	optionsWindow.setVisible(true);	optionsWindow.setResizable(false);	optionsWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); }   // adds choices on screen public class choicePanel extends JPanel { public choicePanel(String title, String[] buttonLabels, JRadioButton[] button) {   super(new GridLayout(10, 1)); // 3, 2	setBackground(Color.lightGray);	setBorder(BorderFactory.createTitledBorder(title));   ButtonGroup group = new ButtonGroup(); int halfLength = (buttonLabels.length / 2);// Assumes even length   for (int i = 0; i < buttonLabels.length; i++) { // < half length  	button[i] = new JRadioButton(buttonLabels[i]);	group.add(button[i]);	add(button[i]);	button[i].setActionCommand(buttonLabels[i]);   // button[i + halfLength] = new JRadioButton(buttonLabels[i + // halfLength]); // group.add(button[i + halfLength]); // add(button[i + halfLength]);; // button[i + halfLength].setActionCommand(buttonLabels[(i + // halfLength)]);   } } }   // set radio buttons highlighted when clicked public void setSelected() {	optionButton1[main.selection1].setSelected(true);	optionButton2[main.selection2].setSelected(true);	optionButton3[main.selection3].setSelected(true);	optionButton4[main.selection4].setSelected(true);	optionButton5[main.selection5].setSelected(true);	optionButton6[main.selection6].setSelected(true); }   public void previousSelected() {   // reset selection for previous piece colour for player 1 if (previousPlayer1PieceColour.equals("Red")) {	main.selection1 = 0; } if (previousPlayer1PieceColour.equals("Orange")) {	main.selection1 = 1; } if (previousPlayer1PieceColour.equals("Yellow")) {	main.selection1 = 2; } if (previousPlayer1PieceColour.equals("Green")) {	main.selection1 = 3; } if (previousPlayer1PieceColour.equals("Blue")) {	main.selection1 = 4; } if (previousPlayer1PieceColour.equals("Purple")) {	main.selection1 = 5; } if (previousPlayer1PieceColour.equals("Pink")) {	main.selection1 = 6; } if (previousPlayer1PieceColour.equals("White")) {	main.selection1 = 7; } if (previousPlayer1PieceColour.equals("Black")) {	main.selection1 = 8; } if (previousPlayer1PieceColour.equals("Random")) {	main.selection1 = 9; }   // reset selection for previous piece colour for player 2 if (previousPlayer2PieceColour.equals("Red")) {	main.selection2 = 0; } if (previousPlayer2PieceColour.equals("Orange")) {	main.selection2 = 1; } if (previousPlayer2PieceColour.equals("Yellow")) {	main.selection2 = 2; } if (previousPlayer2PieceColour.equals("Green")) {	main.selection2 = 3; } if (previousPlayer2PieceColour.equals("Blue")) {	main.selection2 = 4; } if (previousPlayer2PieceColour.equals("Purple")) {	main.selection2 = 5; } if (previousPlayer2PieceColour.equals("Pink")) {	main.selection2 = 6; } if (previousPlayer2PieceColour.equals("White")) {	main.selection2 = 7; } if (previousPlayer2PieceColour.equals("Black")) {	main.selection2 = 8; } if (previousPlayer2PieceColour.equals("Random")) {	main.selection2 = 9; }   // reset selection for previous board colour if (previousBoardColour.equals("Red")) {	main.selection3 = 0; } if (previousBoardColour.equals("Orange")) {	main.selection3 = 1; } if (previousBoardColour.equals("Yellow")) {	main.selection3 = 2; } if (previousBoardColour.equals("Green")) {	main.selection3 = 3; } if (previousBoardColour.equals("Blue")) {	main.selection3 = 4; } if (previousBoardColour.equals("Purple")) {	main.selection3 = 5; } if (previousBoardColour.equals("Pink")) {	main.selection3 = 6; } if (previousBoardColour.equals("White")) {	main.selection3 = 7; } if (previousBoardColour.equals("Black")) {	main.selection3 = 8; } if (previousBoardColour.equals("Random")) {	main.selection3 = 9; }   // reset selection for previous player 1 piece type if (previousPlayer1PieceType.equals("Circle")) {	main.selection4 = 0; } if (previousPlayer1PieceType.equals("Square")) {	main.selection4 = 1; } if (previousPlayer1PieceType.equals("Triangle")) {	main.selection4 = 2; } if (previousPlayer1PieceType.equals("Star")) {	main.selection4 = 3; } if (previousPlayer1PieceType.equals("Random")) {	main.selection4 = 4; }   // reset selection for previous player 2 piece type if (previousPlayer2PieceType.equals("Circle")) {	main.selection5 = 0; } if (previousPlayer2PieceType.equals("Square")) {	main.selection5 = 1; } if (previousPlayer2PieceType.equals("Triangle")) {	main.selection5 = 2; } if (previousPlayer2PieceType.equals("Star")) {	main.selection5 = 3; } if (previousPlayer2PieceType.equals("Random")) {	main.selection5 = 4; }   // reset selection for previous game type if (previousGameType.equals("Player")) {	main.selection6 = 0; } if (previousGameType.equals("Computer")) {	main.selection6 = 1; }   }   // set selections public void cancelSelections() { String a = previousPlayer1PieceColour; String b = previousPlayer2PieceColour; String c = previousBoardColour; String d = previousPlayer1PieceType; String e = previousPlayer2PieceType; String f = previousGameType; }   // unselect(); radio buttons if one colour is selected public void unselect() {   if (main.pieceColourPlayer1.equals("Red")) {	optionButton2[0].setEnabled(false); } else {	optionButton2[0].setEnabled(true); }   if (main.pieceColourPlayer1.equals("Orange")) {	optionButton2[1].setEnabled(false); } else {	optionButton2[1].setEnabled(true); }   if (main.pieceColourPlayer1.equals("Yellow")) {	optionButton2[2].setEnabled(false); } else {	optionButton2[2].setEnabled(true); }   if (main.pieceColourPlayer1.equals("Green")) {	optionButton2[3].setEnabled(false); } else {	optionButton2[3].setEnabled(true); }   if (main.pieceColourPlayer1.equals("Blue")) {	optionButton2[4].setEnabled(false); } else {	optionButton2[4].setEnabled(true); }   if (main.pieceColourPlayer1.equals("Purple")) {	optionButton2[5].setEnabled(false); } else {	optionButton2[5].setEnabled(true); }   if (main.pieceColourPlayer1.equals("Pink")) {	optionButton2[6].setEnabled(false); } else {	optionButton2[6].setEnabled(true); }   if (main.pieceColourPlayer1.equals("White")) {	optionButton2[7].setEnabled(false); } else {	optionButton2[7].setEnabled(true); }   if (main.pieceColourPlayer1.equals("Black")) {	optionButton2[8].setEnabled(false); } else {	optionButton2[8].setEnabled(true); }   if (main.pieceColourPlayer2.equals("Red")) {	optionButton1[0].setEnabled(false); } else {	optionButton1[0].setEnabled(true); }   if (main.pieceColourPlayer2.equals("Orange")) {	optionButton1[1].setEnabled(false); } else {	optionButton1[1].setEnabled(true); }   if (main.pieceColourPlayer2.equals("Yellow")) {	optionButton1[2].setEnabled(false); } else {	optionButton1[2].setEnabled(true); }   if (main.pieceColourPlayer2.equals("Green")) {	optionButton1[3].setEnabled(false); } else {	optionButton1[3].setEnabled(true); }   if (main.pieceColourPlayer2.equals("Blue")) {	optionButton1[4].setEnabled(false); } else {	optionButton1[4].setEnabled(true); }   if (main.pieceColourPlayer2.equals("Purple")) {	optionButton1[5].setEnabled(false); } else {	optionButton1[5].setEnabled(true); }   if (main.pieceColourPlayer2.equals("Pink")) {	optionButton1[6].setEnabled(false); } else {	optionButton1[6].setEnabled(true); }   if (main.pieceColourPlayer2.equals("White")) {	optionButton1[7].setEnabled(false); } else {	optionButton1[7].setEnabled(true); }   if (main.pieceColourPlayer2.equals("Black")) {	optionButton1[8].setEnabled(false); } else {	optionButton1[8].setEnabled(true); }   }   // get random shape for pieces public String getShape(int r) { switch (r) {   case 0: return "Circle"; case 1: return "Square"; case 2: return "Triangle"; case 3: return "Star"; default: break; } return ""; }   // get random colour for pieces public String getColour(int r) { switch (r) { case 0: return "Red"; case 1: return "Orange"; case 2: return "Yellow"; case 3: return "Green"; case 4: return "Blue"; case 5: return "Purple"; case 6: return "Pink"; case 7: return "White"; case 8: return "Black"; default: break; } return ""; }   // get random colour for board public void getBoard(int r) { switch (r) { case 0: { System.out.println("Colour : Red");	main.connectFourPane.setBackground(Color.red);	main.blackBorder();	main.selection3 = 9;	setSelected(); break; } case 1: { System.out.println("Colour : Orange");	main.connectFourPane.setBackground(Color.orange);	main.blackBorder();	main.selection3 = 9;	setSelected(); break; } case 2: { System.out.println("Colour : Yellow");	main.connectFourPane.setBackground(Color.yellow);	main.blackBorder();	main.selection3 = 9;	setSelected(); break; } case 3: { System.out.println("Colour : Green");	main.connectFourPane.setBackground(Color.green);	main.blackBorder();	main.selection3 = 9;	setSelected(); break; } case 4: { System.out.println("Colour : Blue");	main.connectFourPane.setBackground(Color.blue);	main.blackBorder();	main.selection3 = 9;	setSelected(); break; } case 5: { System.out.println("Colour : Purple");	main.connectFourPane.setBackground(new Color(160, 32, 240));	main.blackBorder();	main.selection3 = 9;	setSelected(); break; } case 6: { System.out.println("Colour : Pink");	main.connectFourPane.setBackground(Color.pink);	main.blackBorder();	main.selection3 = 9;	setSelected(); break; } case 7: { System.out.println("Colour : White");	main.connectFourPane.setBackground(Color.white);	main.blackBorder();	main.selection3 = 9;	setSelected(); break; } case 8: { System.out.println("Colour : Black");	main.connectFourPane.setBackground(Color.black);	main.whiteBorder();	main.selection3 = 9;	setSelected(); break; } default: break; } }   // return colour id public int getColourId(String colour) { if (colour.equals("Red")) { return 0; } if (colour.equals("Orange")) { return 1; } if (colour.equals("Yellow")) { return 2; } if (colour.equals("Green")) { return 3; } if (colour.equals("Blue")) { return 4; } if (colour.equals("Purple")) { return 5; } if (colour.equals("Pink")) { return 6; } if (colour.equals("White")) { return 7; } if (colour.equals("Black")) { return 8; } return -1; }   // return board colour id public int getPreviousBoardId() { if (previousBoardColour.equals("Red")) { return 0; } if (previousBoardColour.equals("Orange")) { return 1; } if (previousBoardColour.equals("Yellow")) { return 2; } if (previousBoardColour.equals("Green")) { return 3; } if (previousBoardColour.equals("Blue")) { return 4; } if (previousBoardColour.equals("Purple")) { return 5; } if (previousBoardColour.equals("Pink")) { return 6; } if (previousBoardColour.equals("White")) { return 7; } if (previousBoardColour.equals("Black")) { return 8; } return -1; }   // action performed by buttons etc public void actionPerformed(ActionEvent e) { if (e.getActionCommand() == ("ok")) { System.out.println("Applying changes...");	optionsWindow.dispose();   if (previousGameType == "Player" && main.gameType == "Computer") {	main.resetBoard(); } if (previousGameType == "Computer" && main.gameType == "Player") {	main.resetBoard(); }   }   // return and set all previous settings that were saved before if (e.getActionCommand() == ("cancel")) { System.out.println("Cancelling...");   // store what was originally saved	main.pieceColourPlayer1 = previousPlayer1PieceColour;	main.pieceColourPlayer2 = previousPlayer2PieceColour;	main.pieceTypePlayer1 = previousPlayer1PieceType;	main.pieceTypePlayer2 = previousPlayer2PieceType; int boardId = getPreviousBoardId();	getBoard(boardId);	main.boardColour = getColour(boardId);   // select what was originally selected	previousSelected();	setSelected();   // set previous game type	main.gameType = previousGameType;	check.resetImages();	optionsWindow.dispose(); }   // starting player 1 action listeners   if (e.getActionCommand() == ("Red")) { System.out.println("Colour : Red");	main.pieceColourPlayer1 = "Red";	main.selection1 = 0;	setSelected();	check.resetImages();	unselect(); } if (e.getActionCommand() == ("Orange")) { System.out.println("Colour : Orange");	main.pieceColourPlayer1 = "Orange";	main.selection1 = 1;	setSelected();	check.resetImages();	unselect(); } if (e.getActionCommand() == ("Yellow")) { System.out.println("Colour : Yellow");	main.pieceColourPlayer1 = "Yellow";	main.selection1 = 2;	setSelected();	check.resetImages();	unselect(); } if (e.getActionCommand() == ("Green")) { System.out.println("Colour : Green");	main.pieceColourPlayer1 = "Green";	main.selection1 = 3;	setSelected();	check.resetImages();	unselect(); } if (e.getActionCommand() == ("Blue")) { System.out.println("Colour : Blue");	main.pieceColourPlayer1 = "Blue";	main.selection1 = 4;	setSelected();	check.resetImages();	unselect(); } if (e.getActionCommand() == ("Purple")) { System.out.println("Colour : Purple");	main.pieceColourPlayer1 = "Purple";	main.selection1 = 5;	setSelected();	check.resetImages();	unselect(); } if (e.getActionCommand() == ("Pink")) { System.out.println("Colour : Pink");	main.pieceColourPlayer1 = "Pink";	main.selection1 = 6;	setSelected();	check.resetImages();	unselect(); } if (e.getActionCommand() == ("White")) { System.out.println("Colour : White");	main.pieceColourPlayer1 = "White";	main.selection1 = 7;	setSelected();	check.resetImages();	unselect(); } if (e.getActionCommand() == ("Black")) { System.out.println("Colour : Black");	main.pieceColourPlayer1 = "Black";	main.selection1 = 8;	setSelected();	check.resetImages();	unselect(); } if (e.getActionCommand() == ("Random")) { System.out.println("Colour : Random");	randomNo = new Random(); int r = randomNo.nextInt(4);	main.pieceColourPlayer1 = getColour(r);	main.selection1 = 9;	setSelected();	check.resetImages();	unselect(); }   // starting player 2 action listeners   if (e.getActionCommand() == ("Red ")) { System.out.println("Colour : Red");	main.pieceColourPlayer2 = "Red";	main.selection2 = 0;	setSelected();	check.resetImages();	unselect(); } if (e.getActionCommand() == ("Orange ")) { System.out.println("Colour : Orange");	main.pieceColourPlayer2 = "Orange";	main.selection2 = 1;	setSelected();	check.resetImages();	unselect(); } if (e.getActionCommand() == ("Yellow ")) { System.out.println("Colour : Yellow");	main.pieceColourPlayer2 = "Yellow";	main.selection2 = 2;	setSelected();	check.resetImages();	unselect(); } if (e.getActionCommand() == ("Green ")) { System.out.println("Colour : Green");	main.pieceColourPlayer2 = "Green";	main.selection2 = 3;	setSelected();	check.resetImages();	unselect(); } if (e.getActionCommand() == ("Blue ")) { System.out.println("Colour : Blue");	main.pieceColourPlayer2 = "Blue";	main.selection2 = 4;	setSelected();	check.resetImages();	unselect(); } if (e.getActionCommand() == ("Purple ")) { System.out.println("Colour : Purple");	main.pieceColourPlayer2 = "Purple";	main.selection2 = 5;	setSelected();	check.resetImages();	unselect(); } if (e.getActionCommand() == ("Pink ")) { System.out.println("Colour : Pink");	main.pieceColourPlayer2 = "Pink";	main.selection2 = 6;	check.resetImages();	setSelected();	unselect(); } if (e.getActionCommand() == ("White ")) { System.out.println("Colour : White");	main.pieceColourPlayer2 = "White";	main.selection2 = 7;	setSelected();	check.resetImages();	unselect(); } if (e.getActionCommand() == ("Black ")) { System.out.println("Colour : Black");	main.pieceColourPlayer2 = "Black";	main.selection2 = 8;	setSelected();	check.resetImages();	unselect(); } if (e.getActionCommand() == ("Random ")) { System.out.println("Colour : Random");	randomNo = new Random(); int r = randomNo.nextInt(5) + 4;	main.pieceColourPlayer2 = getColour(r);	main.selection2 = 9;	setSelected();	check.resetImages();	unselect(); }   // starting board action listeners   if (e.getActionCommand() == ("Red Board")) { System.out.println("Colour : Red");	main.connectFourPane.setBackground(Color.red);	main.blackBorder();	main.selection3 = 0;	setSelected();	main.boardColour = "Red"; } if (e.getActionCommand() == ("Orange Board")) { System.out.println("Colour : Orange");	main.connectFourPane.setBackground(Color.orange);	main.blackBorder();	main.selection3 = 1;	setSelected();	main.boardColour = "Orange"; } if (e.getActionCommand() == ("Yellow Board")) { System.out.println("Colour : Yellow");	main.connectFourPane.setBackground(Color.yellow);	main.blackBorder();	main.selection3 = 2;	setSelected();	main.boardColour = "Yellow"; } if (e.getActionCommand() == ("Green Board")) { System.out.println("Colour : Green");	main.connectFourPane.setBackground(Color.green);	main.blackBorder();	main.selection3 = 3;	setSelected();	main.boardColour = "Green"; } if (e.getActionCommand() == ("Blue Board")) { System.out.println("Colour : Blue");	main.connectFourPane.setBackground(Color.blue);	main.blackBorder();	main.selection3 = 4;	setSelected();	main.boardColour = "Blue"; } if (e.getActionCommand() == ("Purple Board")) { System.out.println("Colour : Purple");	main.connectFourPane.setBackground(new Color(160, 32, 240));	main.blackBorder();	main.selection3 = 5;	setSelected();	main.boardColour = "Purple"; } if (e.getActionCommand() == ("Pink Board")) { System.out.println("Colour : Pink");	main.connectFourPane.setBackground(new Color(255, 110, 180));	main.blackBorder();	main.selection3 = 6;	setSelected();	main.boardColour = "Pink"; } if (e.getActionCommand() == ("White Board")) { System.out.println("Colour : White");	main.connectFourPane.setBackground(Color.white);	main.blackBorder();	main.selection3 = 7;	setSelected();	main.boardColour = "White"; } if (e.getActionCommand() == ("Black Board")) { System.out.println("Colour : Black");	main.connectFourPane.setBackground(Color.black);	main.whiteBorder();	main.selection3 = 8;	setSelected();	main.boardColour = "Black"; } if (e.getActionCommand() == ("Random Board")) { System.out.println("Colour : Random");	randomNo = new Random(); int r = randomNo.nextInt(9);	getBoard(r);	main.boardColour = "Random"; }   // starting piece type action listeners player 1 if (e.getActionCommand() == ("Circle")) {	main.pieceTypePlayer1 = "Circle";	main.selection4 = 0;	setSelected();	check.resetImages(); } if (e.getActionCommand() == ("Square")) {	main.pieceTypePlayer1 = "Square";	main.selection4 = 1;	setSelected();	check.resetImages(); } if (e.getActionCommand() == ("Triangle")) {	main.pieceTypePlayer1 = "Triangle";	main.selection4 = 2;	setSelected();	check.resetImages(); } if (e.getActionCommand() == ("Star")) {	main.pieceTypePlayer1 = "Star";	main.selection4 = 3;	setSelected();	check.resetImages(); } if (e.getActionCommand() == ("Random ")) {	randomNo = new Random(); int r = randomNo.nextInt(4);	main.pieceTypePlayer1 = getShape(r);	main.selection4 = 4;	setSelected();	check.resetImages(); }   // starting piece type action listeners player 2 if (e.getActionCommand() == ("Circle ")) {	main.pieceTypePlayer2 = "Circle";	main.selection5 = 0;	setSelected();	check.resetImages(); } if (e.getActionCommand() == ("Square ")) {	main.pieceTypePlayer2 = "Square";	main.selection5 = 1;	setSelected();	check.resetImages(); } if (e.getActionCommand() == ("Triangle ")) {	main.pieceTypePlayer2 = "Triangle";	main.selection5 = 2;	setSelected();	check.resetImages(); } if (e.getActionCommand() == ("Star ")) {	main.pieceTypePlayer2 = "Star";	main.selection5 = 3;	setSelected();	check.resetImages(); } if (e.getActionCommand() == ("Random ")) {	randomNo = new Random(); int r = randomNo.nextInt(4);	main.pieceTypePlayer2 = getShape(r);	main.selection5 = 4;	setSelected();	check.resetImages(); }   // options for different game types if (e.getActionCommand() == ("Player v Player")) { System.out.println("Player verses Player ...");	main.gameType = "Player";	main.selection6 = 0;	setSelected(); } if (e.getActionCommand() == ("Player v Comp")) { System.out.println("Player versus computer ...");	main.gameType = "Computer";	main.selection6 = 1;	setSelected(); }   } }>

You DIDN'T NEED to post all of that code, incorrectly to boot. Please read the Announcement topic at the top of the sub-forum to learn how to properly post code and other useful guidance.

Is this the first thing you've ever done or tried to do in Eclipse? If so, do a simple HelloWorld tutorial in the IDE to learn the basics of using it. You can get back to the turorials/samples by selecting "Help", the "Welcome".

Good luck.

Edit. Crossposted here.

Yes, this is my first post here. Sorry for posting it in the wrong place.

I read the Beginners Eclipse Tutorial and found it to be helpful. However, I am still not sure as to how my code will work since it has many classes not just and I wonder if I need an Interface?

I don't think you know what an Interface is, so I'm not sure why you keep wondering if it is some kind of Holy Grail to solve your problems. Stop it.

In the tutorial, you should have started a new project. You may have created a new package in that project. Either in the new package or in the default package (which Eclipse tells you is to be avoided), you created a new class called HelloWorld. In the new class HelloWorld, you typed code that would be compiled and run. You can do the same for this game code, except instead of typing the new code for each class, you'll copy from the stuff you downloaded and paste it into each class. To do that:

Create a new project, and in the new project create a package. Call them whatever you want. In the new package, create a new class for each of the classes you posted with the same name as each of them. I have no idea how many there are. Copy the classes one at a time and paste them into the classes you just created. You should be able to copy over the entire new class except leave the line at the top that declares the package.

I'm sure you'll have errors to clean up when you're done. Eclipse will help with that.