Java Dice Game Code (FREE)

SUBMITTED BY: yppah

DATE: Jan. 24, 2016, 5:21 a.m.

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  1. SAMPLE DICE GAME
  3. import java.util.Random;
  5. /**
  6. * Models a playing die with sides numbered 1 to N.
  7. * All sides have uniform probablity of being rolled.
  8. *
  9. * @author Summer CS 307 class
  10. */
  11. public class Die
  12. { public static final int DEFAULT_SIDES = 6;
  14. private static Random ourRandNumGen = new Random();
  16. private final int iMyNumSides;
  17. private int iMyResult;
  20. /**
  21. * Default constructor.<p>
  22. * pre: none<br>
  23. * post: getNumSides() = DEFAULT_SIDES, getResult() = 1
  24. */
  25. public Die()
  26. { this(DEFAULT_SIDES);
  27. }
  30. /**
  31. * Create a Die with numSides sides<p>
  32. * pre: numSides > 1<br>
  33. * post: getNumSides() = numSides, getResult() = 1<br>
  34. * An exception will be generated if the preconditions are not met
  35. */
  36. public Die(int numSides)
  37. { assert numSides > 1 : "Violation of precondition: numSides = " + numSides + "numSides must be greater than 1";
  39. iMyNumSides = numSides;
  40. iMyResult = 1;
  41. assert getResult() == 1 && getNumSides() == numSides;
  42. }
  45. /**
  46. * Create a Die with numSides and top side and result set to result<p>
  47. * pre: numSides > 1, 1 <= result <= numSides<br>
  48. * post: getNumSides() = numSides, getResult() = 1<br>
  49. * An exception will be generated if the preconditions are not met
  50. */
  51. public Die(int numSides, int result)
  52. { assert numSides > 1 && 1 <= result && result <= numSides : "Violation of precondition";
  54. iMyNumSides = numSides;
  55. iMyResult = result;
  56. }
  59. /**
  60. * roll this Die. Every side has an equal chance of being the new result<p>
  61. * pre: none<br>
  62. * post: 1 <= getResult() <= getNumSides()
  63. * @return the result of the Die after the roll
  64. */
  65. public int roll()
  66. { iMyResult = ourRandNumGen.nextInt(iMyNumSides) + 1;
  68. assert ( 1 <= getResult() ) && ( getResult() <= getNumSides() );
  70. return iMyResult;
  71. }
  74. /**
  75. * return how many sides this Die has<p>
  76. * pre: none<br>
  77. * post: return how many sides this Die has
  78. * @return the number of sides on this Die
  79. */
  80. public int getNumSides()
  81. { return iMyNumSides; }
  84. /**
  85. * get the current result or top number of this Die<p>
  86. * pre: none<br>
  87. * post: return the number on top of this Die
  88. * @return the current result of this Die
  89. */
  90. public int getResult()
  91. { return iMyResult; }
  94. /**
  95. * returns true if this Die and the parameter otherObj are equal<p>
  96. * pre: none<br>
  97. * post: return true if the parameter is a Die object with the same number of sides as this Die and currently has the same result.
  98. * @return true if the the two Dice are equal, false otherwise
  99. */
  100. public boolean equals(Object otherObj)
  101. { boolean result = true;
  102. if(otherObj == null)
  103. result = false;
  104. else if(this == otherObj)
  105. result = true;
  106. else if(this.getClass() != otherObj.getClass())
  107. result = false;
  108. else
  109. { Die otherDie = (Die)otherObj;
  110. result = this.iMyResult == otherDie.iMyResult
  111. && this.iMyNumSides == otherDie.iMyNumSides;
  112. }
  113. return result;
  114. }
  117. /**
  118. * returns a String containing information about this Die<p>
  119. * pre: none<br>
  120. * post: return a String with information about the current state of this Die
  121. * @return: A String with the number of sides and current result of this Die
  122. */
  123. public String toString()
  124. { return "Num sides " + getNumSides() + " result " + getResult();
  125. }
  128. }// end of Die class
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