| Hello world (two threads) | HelloWorld.java |
| Counting -- has race condition -- two threads | Counting.java |
| Counting fixed by using 'synchronized' -- two threads | CountingFixed.java |
| Find primes in k seconds -- two threads: main is timer | CalculatePrimes.java |
| Find max value in an array -- main plus one thread per row of array | TenThreads.java |