icecream.java

java编程思想的部分实现

//:c09:IceCream.java
public class IceCream
{
	static String []flav={"Chocolate","Strawberry","Vanilla Fudge Swirl","Mint Chip","Mocha Almond Fudge","Rum Raisim","Praline Cream","Mud Pie"};
	static String []flavorSet(int n)
	{
		n=Math.abs(n)%(flav.length+1);
		String [] results=new String[n];
		boolean[]picked=new boolean[flav.length];
		for(int i=0;i<n;i++)
		{
			int t;
			do
			{
				t=(int)(Math.random()*flav.length);
			}
			while(picked[t]);
			results[i]=flav[t];
			picked[t]=true;
		}		
		return results;
	}
	public static void main(String []args)
	{
		for(int i=0;i<20;i++)
		{
			System.out.println("flavorSet("+i+")=");
			String[]f1=flavorSet(flav.length);
			for(int j=0;j<f1.length;j++)
			{
				System.out.println("\t"+f1[j]);
			}
		}
	}
}