java cheatsheet,Java Programming Cheatsheet 不错（arvin ）
来自：http://introcs.cs.princeton.edu/java/11cheatsheet/
This appendix summarizes the most commonly-used Java languagefeatures in the textbook. Here are the APIs of the most common libraries.
Hello, World.
Editing, compiling, and executing.
Built-in data types.
Declaration and assignment statements.
Integers.
Floating-point numbers.
Booleans.
Comparison operators.
Parsing command-line arguments.
Math library.
The full
java.lang.Math API.
Type conversion.
If and if-else statements.
Nested if-else statement.
While and for loops.
Break statement.
Do-while loop.
Switch statement.
Arrays.
Compile-time initialization.
Typical array-processing code.
Two-dimensional arrays.
Compile-time initialization.
Ragged arrays.
Our standard output library.
The full
StdOut API.
Our standard input library.
The full
StdIn API.
Our standard drawing library.
The full
StdDraw API.
Our standard audio library.
The full
StdAudio API.
Redirection and piping.
Functions.
Libraries of functions.
Our standard random library.
Our standard statistics library.
Using an object.
Creating an object.
Instance variables.
Constructors.
Instance methods.
Classes.
Object-oriented libraries.
Java's String data type.
The full
java.lang.String API.
Note: the
java.lang.StringBuilderAPI is similar, but
StringBuilder supports someoperations more efficiently than
String (notably, string concatenation)and some operations less efficiently (notably, substring extraction).
Java's Color data type.
The full
java.awt.Color API.
Our input library.
The full
In API.
Our output library.
The full
Out API.
Our picture library.
The full
Picture API.
Compile-time and run-time errors. Here's a
list of errors compiled byMordechai Ben-Ari.It includes a list of common error message and typical mistakes thatgive rise to them.
Last modified on February 17, 2013.
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