random_value.java

用java编写的拼图游戏

package mypackage;

class random_value {
   int value[];
   int total;
   random_value(int first, int last){
	   int i;
	   total=last-first+1;
	   value=new int[total];
	   for(i=0;i<total;i++){
		   value[i]=first;
		   first++;
	   }
   }
   int getRandomValue() {
		boolean found=false;
		int i;
		int rand,ret;
		if(total==0){return -1;}
		if(total==-1){total=0;return value[0];}
		i=(int)(Math.random()*total);
		ret=value[i];
		total--;
		for(i=i;i<total;i++)
			value[i]=value[i+1];
		   return ret;
    }
}