📄 native_java.html
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<pre class="sourcecode"><code><font color="#003399"><i>/****************************************************************************
*
* Native.java
*
* This code implements the interface to the Delphi code.
*
*
*/</i></font>
<b>class</b> <b>Native</b> {
<font color="#003399"><i>// multiplies 2 integers and returns the result</i></font>
<b>native</b> <b>public</b> <b>int</b> multiplyIntegers(<b>int</b> op1, <b>int</b> op2);
<font color="#003399"><i>// initialize an array of bytes with the value 'value'</i></font>
<b>native</b> <b>public</b> <b>void</b> initializeByteArrayOnce(<b>byte</b>[] array, <b>byte</b> value);
<font color="#003399"><i>// Initializes an array of elements 'count' times with value 'value'</i></font>
<font color="#003399"><i>// The native method is actually overloaded to provided the functionality</i></font>
<font color="#003399"><i>// for the previous method 'initializeByteArrayOnce'. See Native.dpr</i></font>
<font color="#003399"><i>// for details on how to overload native methods.</i></font>
<b>native</b> <b>public</b> <b>void</b> initializeByteArray(<b>byte</b>[] array, <b>int</b> count, <b>byte</b> value);
<font color="#003399"><i>// Used to test the code during upgrade to the JEDI standard</i></font>
<b>native</b> <b>public</b> <b>void</b> testAllTypesD(<b>boolean</b> bool, <b>byte</b> b, <b>char</b> c, <b>int</b> i, <b>long</b> l, <b>float</b> f, <b>double</b> d);
<font color="#003399"><i>// Displays the version of the JVM</i></font>
<b>native</b> <b>public</b> <b>void</b> printVersion();
<font color="#003399"><i>// guess?</i></font>
<b>native</b> <b>public</b> <b>void</b> displayHelloWorld();
<font color="#003399"><i>// Sieves prime numbers</i></font>
<b>native</b> <b>public</b> <b>static</b> <b>int</b> countPrimes(<b>byte</b>[] abFlags);
<font color="#003399"><i>// Pass a 2-D array of bytes to be printed and modified</i></font>
<b>native</b> <b>public</b> <b>void</b> pass2DByteArray(<b>byte</b>[][] array);
<font color="#003399"><i>// Prints all members of this class by using callbacks to the method</i></font>
<font color="#003399"><i>// 'toString' below</i></font>
<b>native</b> <b>public</b> String toStringWithPrint();
<font color="#003399"><i>// Prints a Java String in native code and returns a Java String</i></font>
<b>native</b> <b>public</b> String printLine(String text);
<font color="#003399"><i>// Prints w, x, y, and z using native code (no callback to this class)</i></font>
<b>native</b> <b>public</b> <b>void</b> printWXYZ();
<font color="#003399"><i>// Causes an exception, doesn't handle it in native code</i></font>
<b>native</b> <b>public</b> <b>void</b> causeException();
<font color="#003399"><i>// Causes an exception, handles it in native code</i></font>
<b>native</b> <b>public</b> <b>void</b> handleException();
<font color="#003399"><i>// Prints each element of the objArray using a callback to the object's</i></font>
<font color="#003399"><i>// 'toString' method</i></font>
<b>native</b> <b>public</b> <b>void</b> printObjectArray(Object[] objArray, <b>boolean</b> Print);
<font color="#003399"><i>// Creates, allocates, and initializes an array or Rectangles in native</i></font>
<font color="#003399"><i>// code and returns the array to Java</i></font>
<b>native</b> <b>public</b> java.awt.Rectangle[] returnRectArray(<b>int</b> size);
<font color="#003399"><i>// No arguments, no return value</i></font>
<b>native</b> <b>public</b> <b>void</b> VoidVoid();
<font color="#003399"><i>// For timing test of C++ calling back to Java</i></font>
<b>native</b> <b>public</b> <b>void</b> callbackVoid(<b>int</b> Count);
<font color="#003399"><i>// Loads the file Native.DLL at run-time</i></font>
<b>static</b> {
System.loadLibrary(<font color="#9933CC">"Native"</font>);
}
<font color="#003399"><i>// Primitive types, and a string</i></font>
String string_;
<b>boolean</b> boolean_;
<b>byte</b> byte_;
<b>char</b> char_;
<b>double</b> double_;
<b>float</b> float_;
<b>int</b> int_;
<b>long</b> long_;
<b>short</b> short_;
<font color="#003399"><i>// To test accessing public/private static/non-static</i></font>
<b>public</b> String w;
<b>public</b> <b>int</b> x;
<b>private</b> <b>int</b> y;
<b>public</b> <b>static</b> <b>int</b> z;
<font color="#003399"><i>// Constructor</i></font>
<b>public</b> <b>Native</b>()
{
boolean_ = <b>true</b>;
byte_ = 19;
char_ = <font color="#9933CC">'A'</font>;
double_ = 3.1415926535;
float_ = 10.2f;
int_ = 123456;
long_ = 987654321;
short_ = 12345;
string_ = <font color="#9933CC">"This is a Java string"</font>;
w = <font color="#9933CC">"a Native String"</font>;
x = 5;
y = 11;
z = 20;
}
<b>public</b> <b>static</b> <b>void</b> printHello()
{
System.out.println(<font color="#9933CC">"Hello from Java!"</font>);
}
<font color="#003399"><i>// A good thing to have</i></font>
<b>public</b> String toString()
{
String str = <font color="#9933CC">"Native["</font> +
<font color="#9933CC">"x="</font> + x +
<font color="#9933CC">",y="</font> + y +
<font color="#9933CC">",boolean_="</font> + boolean_ +
<font color="#9933CC">",byte_="</font> + byte_ +
<font color="#9933CC">",char_="</font> + char_ +
<font color="#9933CC">",double_="</font> + double_ +
<font color="#9933CC">",float_="</font> + float_ +
<font color="#9933CC">",int_="</font> + int_ +
<font color="#9933CC">",long_="</font> + long_ +
<font color="#9933CC">",short_="</font> + short_ +
<font color="#9933CC">",string_="</font> + string_ +
<font color="#9933CC">"]"</font>;
<b>return</b> str;
}
<b>public</b> <b>void</b> voidFunc()
{
}
<b>public</b> <b>void</b> testAllTypes(<b>boolean</b> bool, <b>byte</b> b, <b>char</b> c, <b>int</b> i, <b>long</b> l, <b>float</b> f, <b>double</b> d)
{
System.out.println( <font color="#9933CC">"boolean = "</font> + bool + <font color="#9933CC">", "</font>
+ <font color="#9933CC">"byte = "</font> + b + <font color="#9933CC">", "</font>
+ <font color="#9933CC">"char = "</font> + c + <font color="#9933CC">", "</font>
+ <font color="#9933CC">"int = "</font> + i + <font color="#9933CC">", "</font>
+ <font color="#9933CC">"long = "</font> + l + <font color="#9933CC">", "</font>
+ <font color="#9933CC">"float = "</font> + f + <font color="#9933CC">", "</font>
+ <font color="#9933CC">"double = "</font> + d);
}
}
</code></pre>
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