numberguessbean.java

一个JAVA的小例子 很简单 大家试一下

package num;

import java.util.*;

public class NumberGuessBean {

	private int answer;        //每次新游戏随机产生的一个整数，让client来猜
	private boolean success;   // 每次用户猜完后，检测用户是否猜对了
	private String hint;       // 用户每猜一次，如果没有猜对，应有提示，“try higher” 或者 “try lower”
	private int numGuesses;    // 每猜错一次，次数加一；每次新游戏一开始，此次数应为0
    private String guess;      // 每次用户猜的值
  
  public NumberGuessBean() {
    reset();         // 初始化，新游戏开始
  }

  public void setGuess(String guess) {  
	  
	 //此方法根据用户输入的guess值，判断猜测是否正确
	 //如果才错了，应产生相应的hint提示
	 //如果猜对了，success=true
	 //用户每猜一次，numGuesses加一
	                                   
    numGuesses++;

    int g;
    try {
      g = Integer.parseInt(guess);
    }
    catch (NumberFormatException e) {
      g = -1;
    }

    if (g == answer) {
      success = true;
    }
    else if (g == -1) {
      hint = "a number next time";
    }
    else if (g < answer) {
      hint = "higher";
    }
    else if (g > answer) {
      hint = "lower";
    }
  }

  public boolean getSuccess() {
    return success;
  }

  public String getHint() {
    return "" + hint;
  }

  public int getNumGuesses() {
    return numGuesses;
  }

  public void reset() {
    answer = Math.abs(new Random().nextInt() % 100) + 1;
    success = false;
    numGuesses = 0;
    guess = "0";
  }
}