commonEnd.java

/* Given 2 arrays of ints, a and b, return true if they have the same first 
 * element or they have the same last element. Both arrays will be length 1 or 
 * more.
 */
public boolean commonEnd(int[] a, int[] b) {
    return a[0] == b[0] || a[a.length - 1] == b[b.length - 1];
}