php&java（二）

            例子1：创建和使用你自己的JAVA类
创建你自己的JAVA类非常容易。新建一个phptest.java文件，将它放置在你的java.class.path目录下，文件内容如下：
public class phptest{
/**
* A sample of a class that can work with PHP
* NB: The whole class must be public to work,  
* and of course the methods you wish to call
* directly.
*
* Also note that from PHP the main method
* will not be called   
*/
public String foo;
/**
* Takes a string and returns the result
* or a msg saying your string was empty
*/
public String test(String str) {   
if(str.equals("")) {
      str = "Your string was empty. ";   
}   
return str;   
}
/**
* whatisfoo() simply returns the value of the variable foo.
*/   
public String whatisfoo() {   
return "foo is " + foo;   
}
/**
* This is called if phptest is run from the command line with
* something like
*  java phptest
* or
*  java phptest hello there
*/
public static void main(String args[]) {
phptest p = new phptest();
if(args.length == 0) {
String arg = "";
System.out.println(p.test(arg));
}else{
for (int i=0; i test("Hello World") . "";
$myj->foo = "A String Value";
echo "You have set foo to "   . $myj->foo . "
n";
echo "My java method reports: " . $myj->whatisfoo() . "
n";
?>
如果你得到这样的警告信息：java.lang.ClassNotFoundException error ，这就意味着你的phptest.class文件不在你的java.class.path目录下。
注意的是JAVA是一种强制类型语言，而PHP不是，这样我们在将它们融合时，容易导致错误，于是我们在向JAVA传递变量时，要正确指定好变量的类型。如：$myj->foo = (string) 12345678; or $myj->foo = "12345678";
这只是一个很小的例子，你可以创建你自己的JAVA类，并使用PHP很好的调用它！