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1 files changed, 55 insertions, 0 deletions

diff --git a/labs/lab01_pair/PairInterface.java b/labs/lab01_pair/PairInterface.java
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+++ b/labs/lab01_pair/PairInterface.java
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+
+public interface PairInterface<T1,T2>
+{
+	/**
+	 * Gets the first element of this pair.
+	 * @return the first element of this pair.
+	 */
+	public T1 fst();
+
+	/**
+	 * Gets the second element of this pair.
+	 * @return the second element of this pair.
+	 */
+	public T2 snd();
+	
+	/**
+	 * Sets the first element to aFirst.
+	 * @param aFirst  the new first element
+	 */
+	public void setFst(T1 aFirst);
+	
+	/**
+	 * Sets the second element to aSecond.
+	 * @param aSecond  the new second element
+	 */
+	public void setSnd(T2 aSecond);
+	
+	/**
+	 * Checks whether two pairs are equal. Note that the pair
+	 * (a,b) is equal to the pair (x,y) if and only if a is
+	 * equal to x and b is equal to y.
+	 * 
+	 * Note that if you forget to implement this method, your
+	 * compiler will not complain since your class inherits this
+	 * method from the class Object.
+	 * 
+	 * @return true if this pair is equal to aPair. Otherwise
+	 * return false.
+	 */	
+	public boolean equals(Object otherObject);
+	
+	/**
+	 * Generates a string representing this pair. Note that
+	 * the String representing the pair (x,y) is "(x,y)". There
+	 * is no whitespace unless x or y or both contain whitespace
+	 * themselves.
+	 * 
+	 * Note that if you forget to implement this method, your
+	 * compiler will not complain since your class inherits this
+	 * method from the class Object.
+	 * 
+	 * @return a string representing this pair.
+	 */	
+	public String toString();
+}