Java Servlet SAPI
PHP / Java Integration
Java
PHP Manual

# Beispiele

Beispiel #1 Java Beispiel

`<?php
// Instanziere Java Klasse java.lang.System in PHP
$system = new Java('java.lang.System');
// Beispiele fÃ¼r Propertyzugriffe
echo 'Java version=' . $system->getProperty('java.version') . '<br />';
echo 'Java vendor=' . $system->getProperty('java.vendor') . '<br />';
echo 'OS=' . $system->getProperty('os.name') . ' ' .
$system->getProperty('os.version') . ' on ' .
$system->getProperty('os.arch') . ' <br />';
// java.util.Date example
$formatter = new Java('java.text.SimpleDateFormat',
"EEEE, MMMM dd, yyyy 'at' h:mm:ss a zzzz");
echo $formatter->format(new Java('java.util.Date'));
?>`

Beispiel #2 AWT Example

`<?php
// This example is only intended to be run as a CGI.
$frame = new Java('java.awt.Frame', 'PHP');
$button = new Java('java.awt.Button', 'Hello Java World!');
$frame->add('North', $button);
$frame->validate();
$frame->pack();
$frame->visible = True;
$thread = new Java('java.lang.Thread');
$thread->sleep(10000);
$frame->dispose();
?>`
Notes:

- new Java() will create an instance of a class if a suitable constructor is available. If no parameters are passed and the default constructor is useful as it provides access to classes like java.lang.System which expose most of their functionallity through static methods.
- Accessing a member of an instance will first look for bean properties then public fields. In other words, print $date.time will first attempt to be resolved as $date.getTime(), then as $date.time.
- Both static and instance members can be accessed on an object with the same syntax. Furthermore, if the java object is of type java.lang.Class, then static members of the class (fields and methods) can be accessed.

- Exceptions raised result in PHP warnings, and `NULL` results. The warnings may be eliminated by prefixing the method call with an "@" sign. The following APIs may be used to retrieve and reset the last error:

  - java_last_exception_get()
  - java_last_exception_clear()
- Overload resolution is in general a hard problem given the differences in types between the two languages. The PHP Java extension employs a simple, but fairly effective, metric for determining which overload is the best match. Additionally, method names in PHP are not case sensitive, potentially increasing the number of overloads to select from. Once a method is selected, the parameters are coerced if necessary, possibly with a loss of data (example: double precision floating point numbers will be converted to boolean).
- In the tradition of PHP, arrays and hashtables may pretty much be used interchangably. Note that hashtables in PHP may only be indexed by integers or strings; and that arrays of primitive types in Java can not be sparse. Also note that these constructs are passed by value, so may be expensive in terms of memory and time.

Java Servlet SAPI
PHP / Java Integration
Java
PHP Manual