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Setting a picture to random coordinates?

so I'm trying to write a flappy bird like coin collector game, and when I try to set the coin images coordinates to a random number the screen freezes. Any help?
Heres my player class:
package gamepackage;
import java.util.Random;
import org.newdawn.slick.*;
import org.newdawn.slick.geom.Rectangle;
import org.newdawn.slick.state.*;
public class Playing extends BasicGameState{
Image coin;
Image guy;
int coincounter = 0;
float x = 30, y = 90;
int coiny = 20, coinx= 1000;
public Playing(int state){
}
public void init(GameContainer gc, StateBasedGame sbg)throws SlickException{
guy = new Image("res/PlaneMovie1.gif");
coin = new Image("res/coin.gif");
}
public void render(GameContainer gc, StateBasedGame sbg, Graphics g)throws SlickException{
g.drawString("Coins:" + coincounter, 70, 70);
g.drawImage(coin, coinx, coiny);
g.drawImage(guy, x, y);
}
public void update(GameContainer gc, StateBasedGame sbg, int delta)throws SlickException{
Input input = gc.getInput();
coinx --;
if(input.isKeyDown(Input.KEY_SPACE)){ y -= 1 ; }
if(input.isKeyDown(Input.KEY_SPACE) == false){ y += .5;}
if(y == coiny){ coincounter += 1;coinx = 1000; coiny -= 20;}
if(coinx == -175){coinx = 1000; coiny += 20;}
}
public int getID(){
return 1;
}
}

Trouble with sprite animation slick2d

We are having trouble making our character animate in a java slick2d game. The tutorial I seen shows doing it how I have done it. Right now it only shows the 1st image when going left or right. It never cycles between the 2 images set in walkLeft and walkRight.
import org.newdawn.slick.*;
import org.newdawn.slick.state.*;
public class Game extends BasicGameState {
Animation cowboy;
Animation movingLeft;
Animation movingRight;
Image background;
boolean quit = false;
int[] animationDuration = {200,200};
float cowboyPositionX = 0;
float cowboyPositionY = -370;
float shiftX = cowboyPositionX + 200;
float shiftY = cowboyPositionY + 830;
public Game(int state) {
}
public void init(GameContainer gc, StateBasedGame sbg)
throws SlickException {
background = new Image("images/background.png");
Image[] walkLeft = { new Image("images/cowboyleft1.png"), new Image("images/cowboyleft2.png") };
Image[] walkRight = { new Image("images/cowboyright1.png"), new Image("images/cowboyright2.png") };
movingLeft = new Animation(walkLeft, animationDuration, false);
movingRight = new Animation(walkRight, animationDuration, false);
cowboy = movingRight;
}
public void render(GameContainer gc, StateBasedGame sbg, Graphics g)
throws SlickException {
background.draw(cowboyPositionX, cowboyPositionY);
cowboy.draw(shiftX, shiftY);
g.drawString("Cowboy's X:" + cowboyPositionX + "\nCowboy's Y: "
+ cowboyPositionY, 400, 20);
}
public void update(GameContainer gc, StateBasedGame sbg, int delta)
throws SlickException {
Input input = gc.getInput();
if (input.isKeyDown(Input.KEY_LEFT)) {
cowboy = movingLeft;
cowboyPositionX += horizontalSpeed;
if (cowboyPositionX > 0) {
cowboyPositionX -= delta * horizontalSpeed;
}
}
if (input.isKeyDown(Input.KEY_RIGHT)) {
cowboy = movingRight;
cowboyPositionX -= horizontalSpeed;
if (cowboyPositionX < -2975.0) {
cowboyPositionX += delta * horizontalSpeed;
}
}
public int getID() {
return 1;
}
}

In your update method try inserting cowboy.update(delta); that should work. It worked for the program that I have been working on.

Illegal start of expression java slick

I have this problem, and it keeps on throwing the illegal start of expression, and I checked the brackets, and I think they're fine. Here's the code: Also, it says that theres an error at line 30, which I don't really understand....
public class Menu extends BasicGameState {
Image playNow;
Image exitGame;
public String mouse = "No Input Yet!";
public Menu(int state) {
}
#Override
public void init(GameContainer gc, StateBasedGame sbg) throws SlickException {
playNow = new Image("res/playNow.png");
exitGame = new Image("res/exitGame.png");
}
#Override
public void render(GameContainer gc, StateBasedGame sbg, Graphics g) throws SlickException {
g.drawString(mouse, 590, 10);
g.drawString("Welcome to my Game!", 100, 50);
playNow.draw(100,100);
exitGame.draw(100, 200);
}
//slick counts from the bottom-left of the display, not the top-left, like java does
#Override
public void update(GameContainer gc, StateBasedGame sbg, int delta) throws SlickException {
Input input = gc.getInput();
int mousex = Mouse.getX();
int mousey = Mouse.getY();
mouse = "Mouse coordinate x: " + mousex + " y: " + mousey;
// x-min:105 x-max:300 y-min: y-max:300
if(input.isMouseButtonDown(0)) {
if(mousex>100 && mousex<300) && (mousey>400 && mousey< 435) { //error
sbg.enterState(1);
}
if(mousex>100 && mousex<300) && (mousey>300 && mousey <335) { //error
System.exit(0);
}
}
}
#Override
public int getID() {
return 0;
}
}
I really need help quickly.

In Java, the condition for an if must be completely surrounded by parentheses. Change
if(mousex>100 && mousex<300) && (mousey>400 && mousey< 435) {
to
if((mousex>100 && mousex<300) && (mousey>400 && mousey< 435)) {
... and the other if condition similarly.
The compiler thought that (mousex>100 && mousex<300) was the entire condition, and && (mousey>400 && mousey< 435) didn't make sense as the body for the condition.

Mouse Over Area for slick2d?

I cannot find an answer in Google, but is there a Mouse Over Area for Slick2D? Google just gives me results of Java's MouseOverArea. I just want to know if there is a MouseOverArea for Slick2D, and how it looks like.
Here is my code:
Game class
import org.newdawn.slick.*;
import org.newdawn.slick.state.*;
public class Game extends StateBasedGame {
public static final String gamename = "Life - Alpha";
public static int splash = 0;
public static int menu = 1;
public static int loading = 2;
public static int play= 3;
public Game(String gamename) {
super(gamename);
}
public void initStatesList(GameContainer gc) throws SlickException {
this.addState(new SplashScreen (splash));
this.addState(new Menu (menu));
this.addState(new Exit (exit));
this.addState(new Loading (loading));
this.addState(new Play(play));
this.enterState(0);
}
public static void main(String[] args) {
AppGameContainer app;
try {
app = new AppGameContainer(new Game(gamename));
app.setDisplayMode(800, 600, false);
app.start();
} catch (SlickException e) {
e.printStackTrace();
}
}
}
SplashScreen class:
import org.newdawn.slick.GameContainer;
import org.newdawn.slick.Graphics;
import org.newdawn.slick.Image;
import org.newdawn.slick.SlickException;
import org.newdawn.slick.state.BasicGameState;
import org.newdawn.slick.state.StateBasedGame;
public class SplashScreen extends BasicGameState {
Image splash;
private int elapsedTime;
private final int DELAY = 3000;
public SplashScreen(int state) {
}
public void init(GameContainer gc, StateBasedGame sbg) throws SlickException {
splash = new Image("res/SplashScreen.png");
}
public void render(GameContainer gc, StateBasedGame sbg, Graphics g) throws SlickException {
g.drawImage(splash, 0, 0);
}
public void update(GameContainer gc, StateBasedGame sbg, int delta) throws SlickException {
elapsedTime += delta;
if(elapsedTime >= DELAY) {
sbg.enterState(1);
}
}
public int getID() {
return 0;
}
}
Menu class:
import org.lwjgl.input.Mouse;
import org.newdawn.slick.*;
import org.newdawn.slick.state.*;
public class Menu extends BasicGameState {
public Menu(int state) {
}
public void init(GameContainer gc, StateBasedGame sbg) throws SlickException {
}
public void render(GameContainer gc, StateBasedGame sbg, Graphics g) throws SlickException {
Image background = new Image("res/Background.png");
g.drawImage(background, 0, 0);
Image logo = new Image("res/Logo.png");
g.drawImage(logo, 275, 50);
Image playButton = new Image("res/Play button.png");
g.drawImage(playButton, 210, 250);
}
public void update(GameContainer gc, StateBasedGame sbg, int delta) throws SlickException {
Input input = gc.getInput();
int xpos = Mouse.getX();
int ypos = Mouse.getY();
if ((xpos > 300 && xpos < 510) && (ypos > 230 && ypos < 260)) {
if (input.isMousePressed(0)) {
sbg.enterState(2);
}
//I want to put the Slick2D MouseOverArea code here...
//So then when I put the mouse over the playButton, something will display.
}
}
public int getID() {
return 1;
}
}
Loading class:
import org.newdawn.slick.*;
import org.newdawn.slick.state.*;
public class Loading extends BasicGameState {
private int elapsedTime;
private final int DELAY = 5000;
public Loading(int state) {
}
public void init(GameContainer gc, StateBasedGame sbg) throws SlickException {
}
public void render(GameContainer gc, StateBasedGame sbg, Graphics g) throws SlickException {
Image background = new Image("res/Back.png");
g.drawImage(background, 0, 0);
Image loading = new Image("res/Loading.png");
g.drawImage(loading, 210, 150);
}
public void update(GameContainer gc, StateBasedGame sbg, int delta) throws SlickException {
elapsedTime += delta;
if(elapsedTime >= DELAY) {
sbg.enterState(3);
}
}
public int getID() {
return 2;
}
}
Play class:
I'm working on it still... but this class doesn't need the MouseOverArea, the Menu class does.
So that was my code above. I just need a MouseOverArea for Slick2D. Google doesn't help. Hope you can.
Also, can you have a TextField in Slick2D? I don't know if I can. I know in normal Java you can, but can you in Slick2D?
If there are any mistakes, don't worry, I can fix them.
Thanks

Isn't the code put in here?
if ((xpos > 300 && xpos < 510) && (ypos > 230 && ypos < 260)) {
//mouseover
if (input.isMousePressed(0)) {
sbg.enterState(2);
}
}
}

Stopping image movement

okay, so i have my image move straight down along the y axis whenever i click the mouse, my only problem is i don't know how to get it to stop when it hits the bottom of the screen, can someone please help?
import java.awt.Point;
import org.newdawn.slick.GameContainer;
import org.newdawn.slick.Graphics;
import org.newdawn.slick.SlickException;
import org.newdawn.slick.state.BasicGameState;
import org.newdawn.slick.state.StateBasedGame;
public class Control extends BasicGameState {
public static final int ID = 1;
public Methods m = new Methods();
public Point[] point = new Point[(800 * 600)];
int pressedX;
int pressedY;
int num = 0;
String Build = "1.1";
public void init(GameContainer container, StateBasedGame game) throws SlickException{
}
public void render(GameContainer container, StateBasedGame game, Graphics g) throws SlickException {
for (Point p : point) {
if (p != null) {
m.drawParticle(p.x, p.y += 1);
}
}
g.drawString("Particle Test", 680, 0);
g.drawString("Build: " + Build, 680, 15);
g.drawString("Pixels: " + num, 10, 25);
}
public void update(GameContainer container, StateBasedGame game, int delta) {
}
public void mousePressed(int button, int x, int y) {
pressedX = x;
pressedY = y;
num = num + 1;
point[num] = new Point(pressedX, pressedY);
}
public int getID() {
return ID;
}
}

I'd imagine somewhere you will want to check the x/y pos of the particle before you renderer it and remove it from the array when it's out of bounds...
public void render(GameContainer container, StateBasedGame game, Graphics g) throws SlickException {
for (int index = 0; index < point.length; index++) {
Point p = point[index];
if (p != null) {
p.y++;
if (p.y > height) { // You'll need to define height...
point[index] = null; // Or do something else with it??
} else {
m.drawParticle(p.x, p.y);
}
}
}
g.drawString("Particle Test", 680, 0);
g.drawString("Build: " + Build, 680, 15);
g.drawString("Pixels: " + num, 10, 25);
}
You could also do a preemptive check, which would allow you to know what points are at the bottom of the screen...
if (p != null) {
if (p.y >= height) { // You'll need to define height...
// Do something here
} else {
p.y++;
m.drawParticle(p.x, p.y);
}
}