KwickClips Java · 42 sec · free
Which loop is easiest for reading every item?
Short answer. The for-each loop.
Why not remove inside a for-each loop?
It gives a ConcurrentModificationException. Use an Iterator instead.
Remember
| Index, for-each, Iterator |
| Remove with Iterator |
Three ways to visit every item. Which is easiest? For each is easiest. It gives each item x in m. Here each mark is added to t. To remove while looping, use an Iterator. Loop by index, for each or Iterator. Remove with an Iterator.
This clip is from the full lesson: ArrayList and Collections — 7 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: Programming All levels Java
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