Download Java Syntax Cheat Sheet and more Cheat Sheet Java Programming in PDF only on Docsity! BASIC DEFINITIONS Class Describes a particular kind of object. It can contain related methods and variables. Method A function defined in a class. Methods implement the behavior for objects. Object The principal building blocks of Java. Objects consist of variables (data) and methods (functionality). COMMENTS HTML Comments <!-- comment --> Sent to the client in the viewable page source. JSP Commens (Not Sent to Client) <%-- comment --%> Comments in JSP file. // comment Comment in scriplet part of JSP file. ELEMENTS Declaration <%! declaration %> Creates a global variable or method. Expression <%= expression %> Statements evaluated on the server before the page is outputted to the client. Page Directive <%@ directive %> Attributes that apply to the entire page. Scriplet <% code fragment of one or more lines %> Contains a block of scripting code which is executed when the page is generated. Taglib Directive <%@ taglib uri="URIToTagLibrary" prefix="tagPrefix" %> Defines a tag library and prefix for tags used in a JSP page. SEPARATORS ( ) Used to surround parameters { } Defines a block of code for a class or method or to contain the values of automatically initialized arrays [ ] Declares arrays or references array values ; Denotes the end of a statement , Separates variables . Separates package names from subpackages/ classes or a variable/method from a reference variable PRIMITIVE DATA TYPES Type Description Bits (Integers) byte Byte-length integer 8 short Short integer 16 int Integer 32 long Long integer 64 (Real Numbers) float Single-precision floating point 32 double Double-precision floating point 64 (Other) char A single character 16 boolean A boolean value (true or false) 1 OPERATORS + addition of numbers, concatenation of Strings += add and assign numbers, concatenate and assign Strings - subtraction -= subtract and assign * multiplication *= multiply and assign / division /= divide and assign % take remainder %= take remainder and assign ++ increment by one -- decrement by one > greater than >= greater than or equal to < less than <= less than or equal to ! boolean NOT != not equal to && boolean AND || boolean OR == boolean equals = assignment JAVA SYNTAX CHEAT SHEET Control Flow Selection If Else Switch Case Loop While Do For Exception Throw Try Catch Finally Branch Return Break Continue Label Key Words abstract assert boolean break byte case catch char class const continue default do double else enum extends false final finally float for goto if implements import instanceof int interface long native new null package private protected public return short static strictfp super switch synchronized this throw throws transient true try void volatile while
