backcalss.java

是男人就下100层的游戏的移植到手机上的

//package src;

import java.util.Random;
import java.util.Vector;

public class BackCalss {
	int add_back_X;
	
	int speed;

	Random r = new Random();

	Vector BackVector = new Vector();

	int add_time;

	int ready;

	//	ManAction man;
	int width, height;

	public BackCalss(int width, int height) {
		this.width = width;
		this.height = height;
	}

	public void Move() {
		for (int i = 0; i < BackVector.size(); i++) {
			int a[] = (int[]) BackVector.elementAt(i);
			a[1] -= speed;
			if (a[1] < 0) {
				//如果第一个被删除，第二个前移，但此时第二个的位置不变，出现卡的现象
				BackVector.removeElementAt(i);
				i=-1;
			} else {
				BackVector.setElementAt(a, i);
			}
		}
	}

	public void Add() {
		int world_width = width - 9 * 2 - 20 * 2;
		add_back_X = GetRandom(world_width) + 20 + 9;
		ready = 0;
		int a[] = { add_back_X, height+9, ready };
		BackVector.addElement(a);
		//		System.out.println("BackAdd__BAckAdd_XXX: "+add_back_X);
	}
	
	public int GetRandom(int x) {
		int random = r.nextInt() % x;
		if (random < 0)
			random *= -1;
		return random;
	}

}