What are some examples of Holden's internal and external conflicts in The Catcher in the Rye?

Holden's inability to deal with things, is his most
pressing conflict that he has. He lives in the past and therefore, can't move on with
his life. He is an angry young man. His external conflicts stem from this. He is angry
with life, and society. He thinks people are hypocrites and that they only care about
material things. He will start fights with people for no reason at all. He is very
selfish at this point in his life. It is quite apparent that he is suffering from some
sort of mental break, and this is causing him to create external conflict with everyone
he meets.

Holden's biggest internal conflict, is that he
can not deal with the death of his younger brother, Allie. This event has haunted him
since his death. Holden slept in the garage the night his brother died and broke all the
windows in the garage. He has harbored this anger and sadness inside himself for many
years, now. He is unprepared on how to deal with is
feelings.

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"The thing was, I couldn't think of a room or a
house or anything to describe the way Stradater said he had to have. I'm not too crazy
about describing rooms and houses anyway. So what I did, I wrote about my brother
Allie's baseball mitt. It was a very descriptive subject. It really was. He was left
handed. The thing that was descriptive about it, though, was that he had poems written
all over the fingers and the pocket and everywhere. In green ink. He wrote them on it so
that he'd have something to read when he was in the field and nobody was at bat. He's
dead now. He got leukemia and died when we were up in Maine, on July 18, 1946. You'd
have liked him. He was two years younger than I was, but he was about fifty times as
intelligent. He was terrifically intelligent. His teachers were always writing letters
to my mother, telling her what a pleasure it was having a boy like Allie in their class.
And they weren't just shooting the crap. They really meant it. But it wasn't just that
he was the most intelligent member in the family. He was also the nicest, in lots of
ways. He never got mad at anybody...God he was a nice kid,
though."

As you can see,
Holden is not capable of letting go of the past. He lives constantly trying to tell
himself how wonderful things were, but in reality things were not great. Holden's
inability to face his future with confidence creates conflict where ever he
goes.