Something may be too early to worry

[Callofdudey]

The thing that I'm worrying is, how do you memorize all those mountains of method, packages etc? For example if I want to code a simple calculator, then I might wanna use java.math.*, but what if it's something else, say write a player for android, where to look them up and where to look into?

Another question, what would be the good practice, habit etc. that can help you with memorizing them?

[Fubarable]

Writes lots and lots of code, go to the API frequently. The more you do this, the more the core concepts will be burned into your soul.

[Solarsonic]

No one knows every method and package by heart, only commonly used ones.

Good coders know how to use the Java API (Java Platform SE 6) in order to accomplish their goal.

[sunde887]

Exactly as fubar said, repetition will make it seem natural. Just like a spoken language, at first it may seem like a lot to memorize, but over time the words will just be stored automagically.

The API is like the dictionary of Java, have it handy and you will eventually begin to remember which methods are in which packages. Also using a dumber text editor will help with this(i.e. notepad++). Eclipse and netbeans will hinder you since it helps you out so much with intellisense(or whatever it's called).

Just in case, here is the API: Java Platform SE 6
or if you are using Java 7: Java Platform SE 7

Also, if you are unsure of a method, or package or class, googling "java 6 term" usually helps

examples: java 6 String, java 6 paintComponent, etc.

[Solarsonic]

Exactly as fubar said, repetition will make it seem natural. Just like a spoken language, at first it may seem like a lot to memorize, but over time the words will just be stored automagically.

The API is like the dictionary of Java, have it handy and you will eventually begin to remember which methods are in which packages. Also using a dumber text editor will help with this(i.e. notepad++). Eclipse and netbeans will hinder you since it helps you out so much with intellisense(or whatever it's called).

Just in case, here is the API: Java Platform SE 6
or if you are using Java 7: Java Platform SE 7

Also, if you are unsure of a method, or package or class, googling "java 6 term" usually helps

examples: java 6 String, java 6 paintComponent, etc.

I believe Intellisense is trademark for .NET's Visual Studio :p