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- import java.util.Scanner;
- public class Coin
- {
- private final int HEADS = 0;
- private final int TAILS = 1;
- private int face;
- boolean locked = false;
- Scanner scan = new Scanner(System.in);
- //-----------------------------------------------------------------
- // Sets up the coin by flipping it initially.
- //-----------------------------------------------------------------
- public Coin ()
- {
- flip();
- }
- //-----------------------------------------------------------------
- // Flips the coin by randomly choosing a face value.
- //-----------------------------------------------------------------
- public int setKey(int key)
- { if (locked == false)
- {System.out.println("Please enter the integer key you would like to set.");
- key = scan.nextInt();
- System.out.println("The key has been set.");
- }
- return key;
- }
- public void lock(int key)
- {
- if (locked == false);
- {
- System.out.println("Please enter the key to lock this class.");
- int keyattempt = scan.nextInt();
- if (keyattempt == key)
- {
- locked = true;
- }
- else
- {
- locked = false;
- System.out.println("You entered the key incorrectly. The class remains unlocked.");
- }
- }
- }
- private void unlock(int key)
- {
- while (locked ==true)
- {
- System.out.println("Please enter your key to unlock the class.");
- int keyattempt2 = scan.nextInt();
- if (keyattempt2 == key)
- locked = false;
- else
- {
- locked = true;
- System.out.println("You entered the key incorrectly. The class remains locked.");
- }
- }
- }
- boolean locked()
- {
- if (locked == true)
- return true;
- else
- return false;
- }
- public void flip ()
- { if (locked == false)
- {
- face = (int) (Math.random() * 2);
- }
- }
- //-----------------------------------------------------------------
- // Returns true if the current face of the coin is heads.
- //-----------------------------------------------------------------
- public boolean isHeads ()
- {
- if (locked == false)
- {
- return (face == HEADS);
- }
- return locked;
- }
- //-----------------------------------------------------------------
- // Returns the current face of the coin as a string.
- //-----------------------------------------------------------------
- public String toString()
- { if (locked == false)
- {
- String faceName;
- if (face == HEADS)
- faceName = "Heads";
- else
- faceName = "Tails";
- return faceName;
- }
- return null;
- }
- }
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