Java: Added some simple JavaDoc to the Pair class.

Java/Pair.java

@@ -1,18 +1,36 @@
+/**
+ * Very simple wrapper to contain two values in one object. 
+ */ 
 public class Pair<T,U> {
 	
+	/** The first value */
 	private T first;
+	/** The second value */
 	private U second;
 	
+	/**
+	 * Creates a new Pair of values.
+	 * @param one The first value.
+	 * @param two The second value.
+	 */                	
 	public Pair(T one, U two){
 		this.first = one;
 		this.second = two;
 	}
-	public Pair(){}
+	/**
+	 * Creates a new Pair of values, both initialized to {@code null}
+	 */	 
+	public Pair(){ this(null, null); }
 	
+	/** Returns the first value of this Pair. */     	
 	public T getFirst(){ return this.first; }
+	/** Sets the first value of this Pair. */
 	public void setFirst(T value){ this.first = value; }
+	/** Returns the second value of this Pair. */
 	public U getSecond(){ return this.second; }
+	/** Sets the second value of this Pair. */
 	public void setSecond(U value){ this.second = value; }
+	/** Returns true iff both values in this Pair are non-null. */
 	public boolean allSet(){ return this.first != null && this.second != null; }
 
 }