ask_me.java

JAVA程序设计课程中各章节的程序实例。

import java.util.Random;
interface Showme
{
	 int No = 0;
	 int Yes = 1;
	 int Maybe = 2;
	 int Later = 3;
	 int Soon = 4;
	 int Never = 5;
}

class Question implements Showme
{
	Random Rand = new Random();
	int ask()
	{
		int prob = (int)(100 * Rand.nextDouble());

		if(prob < 30)
			return No;        //30%
		else if(prob < 60)
			return Yes;       //30%
		else if(prob < 75)
			return Later;     //15%
		else if (prob < 98)
			return Soon;      //13%
		else
			return Never;     //2%
	}
}

class ask_me implements Showme
{
	static void answer(int result)
	{
		switch(result)
		{
			case No:
				System.out.println("No");
				break;
			case Yes:
				System.out.println("Yes");
				break;
			case Later:
				System.out.println("Later");
				break;
			case Soon:
				System.out.println("Soon");
				break;
			case Never:
				System.out.println("Never");
				break;
		}
	}
	public static void main(String args[])
	{
		Question q = new Question();
		answer(q.ask());
	}
}