/tags/rel-1-3-25/SWIG/Examples/java/variables/main.java

 1// This example illustrates global variable access from Java.
 2
 3import java.lang.reflect.*;
 4
 5public class main {
 6  static {
 7    try {
 8        System.loadLibrary("example");
 9    } catch (UnsatisfiedLinkError e) {
10      System.err.println("Native code library failed to load. See the chapter on Dynamic Linking Problems in the SWIG Java documentation for help.\n" + e);
11      System.exit(1);
12    }
13  }
14
15  public static void main(String argv[]) {
16
17// Try to set the values of some global variables
18
19    example.setIvar(42);
20    example.setSvar((short)-31000);
21    example.setLvar(65537);
22    example.setUivar(123456);
23    example.setUsvar(61000);
24    example.setUlvar(654321);
25    example.setScvar((byte)-13);
26    example.setUcvar((short)251);
27    example.setCvar('S');
28    example.setFvar((float)3.14159);
29    example.setDvar(2.1828);
30    example.setStrvar("Hello World");
31    example.setIptrvar(example.new_int(37));
32    example.setPtptr(example.new_Point(37,42));
33    example.setName("Bill");
34
35    // Now print out the values of the variables
36
37    System.out.println( "Variables (values printed from Java)" );
38
39    System.out.println( "ivar      =" + example.getIvar() );
40    System.out.println( "svar      =" + example.getSvar() );
41    System.out.println( "lvar      =" + example.getLvar() );
42    System.out.println( "uivar     =" + example.getUivar() );
43    System.out.println( "usvar     =" + example.getUsvar() );
44    System.out.println( "ulvar     =" + example.getUlvar() );
45    System.out.println( "scvar     =" + example.getScvar() );
46    System.out.println( "ucvar     =" + example.getUcvar() );
47    System.out.println( "fvar      =" + example.getFvar() );
48    System.out.println( "dvar      =" + example.getDvar() );
49    System.out.println( "cvar      =" + (char)example.getCvar() );
50    System.out.println( "strvar    =" + example.getStrvar() );
51    System.out.println( "cstrvar   =" + example.getCstrvar() );
52    System.out.println( "iptrvar   =" + Long.toHexString(SWIGTYPE_p_int.getCPtr(example.getIptrvar())) );
53    System.out.println( "name      =" + example.getName() );
54    System.out.println( "ptptr     =" + Long.toHexString(SWIGTYPE_p_Point.getCPtr(example.getPtptr())) + example.Point_print(example.getPtptr()) );
55    System.out.println( "pt        =" + Long.toHexString(SWIGTYPE_p_Point.getCPtr(example.getPt())) + example.Point_print(example.getPt()) );
56
57    System.out.println( "\nVariables (values printed from C)" );
58
59    example.print_vars();
60
61    System.out.println( "\nNow I'm going to try and modify some read only variables" );
62
63    System.out.println( "     Trying to set 'path'" );
64    try {
65        Method m = example.class.getDeclaredMethod("setPath", new Class[] {String.class});
66        m.invoke(example.class, new Object[] {"Whoa!"} );
67        System.out.println( "Hey, what's going on?!?! This shouldn't work" );
68    }
69    catch (NoSuchMethodException e) {
70        System.out.println( "Good." );
71    }
72    catch (Throwable t) {
73        System.out.println( "You shouldn't see this!" );
74    }
75
76    System.out.println( "     Trying to set 'status'" );
77    try {
78        Method m = example.class.getDeclaredMethod("setStatus", new Class[] {Integer.class});
79        m.invoke(example.class, new Object[] {new Integer(0)} );
80        System.out.println( "Hey, what's going on?!?! This shouldn't work" );
81    }
82    catch (NoSuchMethodException e) {
83        System.out.println( "Good." );
84    }
85    catch (Throwable t) {
86        System.out.println( "You shouldn't see this!" );
87    }
88
89    System.out.println( "\nI'm going to try and update a structure variable.\n" );
90
91    example.setPt(example.getPtptr());
92
93    System.out.println( "The new value is" );
94    example.pt_print();
95    System.out.println( "You should see the value" + example.Point_print(example.getPtptr()) );
96  }
97}