我有这个问题，它一直抛出非法的表达式开头，我检查了括号，我认为它们很好。这是代码：另外，它说第 30 行有一个错误，我不太明白....
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;
}
} 我真的需要快速帮助。