Thread: Need help with java code (Lunar Lander game).

Hi there guys, i've got an assignment in university due tomorrow. And im struggling on finishing my code. Its 2D btw.

Basically we have to make a Lunar Lander type game (Accelerating, gravity, crash zone, land pad etc).

Ive done all the gravity, acceleration.

But i'm having trouble making the certain areas of my screen a crash zone and land pad.

The crash zone is basically all the floor (no including the land pad). so that when the image hits the crash zone it changes to an explosiong gif,

And the land pad i need to have the lander speed low enough and it to land on the land pad to be a successfull landing if that makes sense?

Basically I can't get my head around how i tell it that the floor area is solid and is a crash zone and that the land pad is solid and able to land on?

Lunar Lander

sort of like that game but not as many complex cliffs etc.

Any helps appreciated cheers - Jay.

/** * Write a description of class LunarLander here. * * @author (your name) * @version (a version number or a date) */   //Functionality import javax.swing.JFrame; // window functionality import java.awt.Color; // RGB color stuff   import javax.swing.Timer; // import timer functionality import java.awt.event.*; // functionality for the event fired by the timer   import java.awt.*; // Graphics stuff from the AWT library, e.g. Graphics import javax.swing.*; // Graphics stuff from the Swing library, e.g. JLabel import java.awt.image.BufferedImage; // Graphics drawing canvas import java.awt.event.KeyEvent; import java.util.Random; public class LunarLander extends JFrame{   // The Java window private static JFrame window;   // Graphics "Handle" private static Graphics gr;   // Image Storage private static Image theBackground; // Background Image private static Image theLander; // PNG of the Lunar Lander private static Image theBang; // Animated Explosion public static Random randomGen= new Random();   private static int landerX = randomGen.nextInt(800 - 50), landerY = 50; // Starting position of the lander private static boolean explosion=false; // Sets explosion to false public static int speedY = 0; public static int speedX = 0; public static double speedStopping = 1; public static int speedAccelerating = 2; public static int topLandingSpeed = 5;     // Main Method, Create window public static void main(String[] args) {   //Window Setup window = new JFrame(); // Renames the new window   window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // Sets the X to close window.setTitle("Moon Lander, Can you be the first man on the moon!"); // Title Name window.setSize(800, 600); // Window Size window.setResizable(true); // Disables resizable window window.setLocationRelativeTo(null); // Sets location to top of the screen   BufferedImage canvas=new BufferedImage(800,600,BufferedImage.TYPE_INT_ARGB); // Creates A Canvas gr=canvas.getGraphics(); // Creates handle for drawing on the canvas JLabel label=new JLabel(new ImageIcon(canvas)); // Creates label to draw on window.add(label);   window.setVisible(true); // Displays above   //Loading Images theBackground = GameImage.loadImage("Images//Background.png"); // Loads background theLander = GameImage.loadImage("Images//LunarLander.png"); // Loads lander theBang = GameImage.loadImage("Images//explosion.gif"); // Loads Explosion   GameKeyboard.initialise(); // Starts keyboard input       //Timer Setup ActionListener taskPerformer = new ActionListener() { public void actionPerformed(ActionEvent evt) // Calls the actionPerformed() method { doTimerAction(); } }; Timer ScreenTimer = new Timer(75, taskPerformer); // Creates Timer ScreenTimer.start(); // Starts Timer }   // Method to draw all needed images, then timer resets to display on the screen private static void doTimerAction() {   gr.drawImage(theBackground, 0, 0, null); // Overwrites everything with the background image   // User Instructions gr.setColor( Color.red ); // Sets colour red gr.setFont(new Font("Arial", Font.BOLD, 16)); // Sets font gr.drawString("Arrow keys to move, land on the platform to win", 200,200); // Output and location       // Get keys pressed from the keyboard char key= GameKeyboard.getKey(); int specialKey=GameKeyboard.getSpecialKey();     //Keyboard Binding     if (landerY >= 500){ gr.drawImage(theBang, landerX, landerY, null); gr.setColor( Color.red ); // Sets colour red gr.setFont(new Font("Arial", Font.BOLD, 16)); // Sets font gr.drawString("You have crashed! Restart game!", 200,400); }else{     if (specialKey == 38){ speedY -= speedAccelerating; }else{ speedY += speedStopping; }   if (specialKey == 37){ speedX -= speedAccelerating; }else{ speedX += speedStopping; }   if (specialKey == 39){ speedX += speedAccelerating; }else{ speedX -= speedStopping; }   landerX += speedX; landerY += speedY;         gr.setColor( Color.red ); // Sets colour red gr.setFont(new Font("Arial", Font.BOLD, 16)); // Sets font gr.drawString("speedX" + speedX + "speedY" + speedY + "speedAccelerating" +speedAccelerating + "speedStopping" + speedStopping + "landerY" + landerY + "landerX" + landerX, 200,400); gr.drawImage(theLander, landerX, landerY, null); // Draws lander and its position   } window.repaint(); // Re paints everything onto the screen } }