How To Edit Code Template In Java

NetBeans IDE provides lawmaking templates for all the languages it supports. Some of the syntax is general for all languages. Other syntax is specific to a language. In this section, you run across the most relevant general template syntax and the syntax specific to PHP templates.

A PHP lawmaking template tin contain PHP lawmaking and template parameters. A PHP template may consist of merely PHP code, only parameters, or both code and parameters.

The syntax of a code template parameter is a dollar sign, $ , followed by the parameter's definition between curly brackets {…} . Within this syntax, template parameters have one of four forms:

An arbitrary placeholder name, such as ${SomeName}
A reserved name that gives processing instructions to the IDE
A descriptive parameter proper noun and a set of hints that define the parameter
Pre-defined parameters.

The post-obit sections discuss each course of a code template parameter.

${VARIABLE...} `` Sometimes you come across a PHP code template where the syntax seems to be three dollar signs followed by curly brackets ``${…} . In this case, the lawmaking template includes a variable and its name. The syntax here is an escaped dollar sign, written as a double dollar sign `` , followed by a parameter for the variable proper noun, ``${VARIABLE...}`` . For instance, the code template ``catch ${Exception} ${exc} is expanded as [examplecode]# catch Exception $exc #.

Placeholder name

In the simplest case, a lawmaking template parameter is an arbitrary placeholder value. When the template is expanded, the IDE selects this placeholder name for editing.

For instance, consider the new class template (cls) that this tutorial shows in the sections Divers PHP Templates and Expanding the lawmaking template by using the abbreviation + Tab. The expanded text of the new class template begins class ${className} . Here, the word class is PHP code and ${className} is a parameter. This parameter is merely an capricious placeholder value for the proper noun of the class. When the IDE expands the template, ${className} becomes class_name . The IDE expects that class_name is only a placeholder value and automatically selects this value for you to edit.

expanding template with abb

Reserved names

The IDE reserves two parameter names for use as operating instructions.

${cursor} defines the location of the cursor after you cease editing all automatically selected values in the expanded template.
${choice} defines a position for pasting the content of the editor pick. This is used by so-chosen 'selection templates' that appear as hints whenever the user selects text in the editor. If a template includes ${selection} , it usually refers to the same location as ${cursor} .

For example, again consider the new class template (cls) that this tutorial shows in the sections Defined PHP Templates and Expanding the code template past using the abbreviation + Tab. It contains ii placeholder name parameters, ${ClassName} and $__construct . In the office body, it has the parameters ${cursor} and ${selection} .

              class ${ClassName} {     function ${__construct} {${selection}${cursor}}}

After the template expands, the placeholder class_name is selected automatically (1). Press Enter, and the placeholder __construct is selected automatically (2). In that location are no other values to edit. Press Enter over again, and the cursor moves to the location indicated by ${cursor} in the template's text (3).

cursor position changes

Parameter defined past hints

Parameters tin consist of an arbitrary, descriptive name in ALL-CAPS and 1 or more hints.

              ${PARAMETER_NAME hint1[=value] [hint2...hint n]}

The name does not announced anywhere in the code. However, it is useful if y'all want to apply the parameter more than once in a code template. Yous only have to define the parameter the first time, and can refer to it past name all subsequent times. For example, in the following code template the parameter ${CONLINK} is defined only the showtime time but is referred by its name ii more times.

              $$${CONLINK newVarName default="link"} = mysql_connect('localhost', 'mysql_user', 'mysql_password');  if (!$$${CONLINK}) {    die('Could not connect: ' . mysql_error());  }  echo 'Connected successfully';  mysql_close($$${CONLINK});  ${cursor}

Hints help the IDE to compute the value of the template parameter when the IDE expands the lawmaking template. For example, await at the if(true) template, which is used in this tutorial in the section on surrounding your code with a template. The expanded text of this template is

              if (${CONDITION variableFromPreviousAssignment instanceof="boolean" default="true"}) {${selection}${cursor}}

Examine the parameter ${CONDITION variableFromPreviousAssignment instanceof="boolean" default="truthful"} . This parameter sets the condition of the if argument. Therefore the parameter is named CONDITION. The first hint is variableFromPreviousAssignment and the 2d hint is instanceof="boolean" . Together, these two hints tell the IDE to look for the closest boolean variable that is assigned in the code previous to the code template. Add together the third hint, default="truthful" , and the parameter sets the condition as "if the closest previous boolean variable'due south value is true."

For example, when the line $b = 10 in the following code snippet is surrounded past an if(truthful) lawmaking template…

selected variable

…the IDE looks for the closest boolean variable that was assigned previously, finds $a , and generates an if statement with the status $a [=true]. The condition is automatically selected for editing, so the PHP developer can change $a to another variable or to !$a .

inserted if true

The following tabular array lists the hints used in PHP lawmaking templates and descriptions of the hints.

Hint Description

Hint	Description
`newVarName`	The parameter value should exist a 'fresh' unused variable name. Usually used with `default` .
`default=""`	The default value of the parameter.
`instanceof=""`	Blazon of PHP variable defined in the parameter.
`variableFromPreviousAssignment`	The parameter value is the closest previously assigned variable. Usually used with `instanceof` and `default` .
`variableFromNextAssignmentName`	The parameter value is the name of the closest variable assigned afterward the code template. Unremarkably used with `default` .
`variableFromNextAssignmentType`	The parameter value is the type of the closest variable assigned subsequently the code template. Ordinarily used with `default` .
`editable=false`	The parameter value cannot exist edited afterwards the template is expanded.
`allowSurround`	Allows the template to be used to surround code.

newVarName

The parameter value should exist a 'fresh' unused variable name. Usually used with default .

default=""

The default value of the parameter.

instanceof=""

Blazon of PHP variable defined in the parameter.

variableFromPreviousAssignment

The parameter value is the closest previously assigned variable. Usually used with instanceof and default .

variableFromNextAssignmentName

The parameter value is the name of the closest variable assigned afterward the code template. Unremarkably used with default .

variableFromNextAssignmentType

The parameter value is the type of the closest variable assigned subsequently the code template. Ordinarily used with default .

editable=false

The parameter value cannot exist edited afterwards the template is expanded.

allowSurround

Allows the template to be used to surround code.