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7JavaEnvUtils (Apache Ant API)
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82<H2>
83<FONT SIZE="-1">
84org.apache.tools.ant.util</FONT>
85<BR>
86Class JavaEnvUtils</H2>
87<PRE>
88java.lang.Object
89 <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by"><B>org.apache.tools.ant.util.JavaEnvUtils</B>
90</PRE>
91<HR>
92<DL>
93<DT>public final class <B>JavaEnvUtils</B><DT>extends java.lang.Object</DL>
94
95<P>
96A set of helper methods related to locating executables or checking
97 conditons of a given Java installation.
98<P>
99
100<P>
101<DL>
102<DT><B>Since:</B></DT>
103 <DD>Ant 1.5</DD>
104</DL>
105<HR>
106
107<P>
108<!-- ======== NESTED CLASS SUMMARY ======== -->
109
110
111<!-- =========== FIELD SUMMARY =========== -->
112
113<A NAME="field_summary"><!-- --></A>
114<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
115<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
116<TD COLSPAN=2><FONT SIZE="+2">
117<B>Field Summary</B></FONT></TD>
118</TR>
119<TR BGCOLOR="white" CLASS="TableRowColor">
120<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
121<CODE>static&nbsp;java.lang.String</CODE></FONT></TD>
122<TD><CODE><B><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#JAVA_1_0">JAVA_1_0</A></B></CODE>
123
124<BR>
125&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Version constant for Java 1.0</TD>
126</TR>
127<TR BGCOLOR="white" CLASS="TableRowColor">
128<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
129<CODE>static&nbsp;java.lang.String</CODE></FONT></TD>
130<TD><CODE><B><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#JAVA_1_1">JAVA_1_1</A></B></CODE>
131
132<BR>
133&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Version constant for Java 1.1</TD>
134</TR>
135<TR BGCOLOR="white" CLASS="TableRowColor">
136<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
137<CODE>static&nbsp;java.lang.String</CODE></FONT></TD>
138<TD><CODE><B><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#JAVA_1_2">JAVA_1_2</A></B></CODE>
139
140<BR>
141&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Version constant for Java 1.2</TD>
142</TR>
143<TR BGCOLOR="white" CLASS="TableRowColor">
144<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
145<CODE>static&nbsp;java.lang.String</CODE></FONT></TD>
146<TD><CODE><B><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#JAVA_1_3">JAVA_1_3</A></B></CODE>
147
148<BR>
149&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Version constant for Java 1.3</TD>
150</TR>
151<TR BGCOLOR="white" CLASS="TableRowColor">
152<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
153<CODE>static&nbsp;java.lang.String</CODE></FONT></TD>
154<TD><CODE><B><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#JAVA_1_4">JAVA_1_4</A></B></CODE>
155
156<BR>
157&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Version constant for Java 1.4</TD>
158</TR>
159<TR BGCOLOR="white" CLASS="TableRowColor">
160<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
161<CODE>static&nbsp;java.lang.String</CODE></FONT></TD>
162<TD><CODE><B><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#JAVA_1_5">JAVA_1_5</A></B></CODE>
163
164<BR>
165&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Version constant for Java 1.5</TD>
166</TR>
167</TABLE>
168&nbsp;
169<!-- ======== CONSTRUCTOR SUMMARY ======== -->
170
171
172<!-- ========== METHOD SUMMARY =========== -->
173
174<A NAME="method_summary"><!-- --></A>
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181<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
182<CODE>static&nbsp;java.lang.String</CODE></FONT></TD>
183<TD><CODE><B><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#getJavaVersion()">getJavaVersion</A></B>()</CODE>
184
185<BR>
186&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the version of Java this class is running under.</TD>
187</TR>
188<TR BGCOLOR="white" CLASS="TableRowColor">
189<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
190<CODE>static&nbsp;java.lang.String</CODE></FONT></TD>
191<TD><CODE><B><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#getJdkExecutable(java.lang.String)">getJdkExecutable</A></B>(java.lang.String&nbsp;command)</CODE>
192
193<BR>
194&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Finds an executable that is part of a JDK installation based on
195 the java.home system property.</TD>
196</TR>
197<TR BGCOLOR="white" CLASS="TableRowColor">
198<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
199<CODE>static&nbsp;java.lang.String</CODE></FONT></TD>
200<TD><CODE><B><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#getJreExecutable(java.lang.String)">getJreExecutable</A></B>(java.lang.String&nbsp;command)</CODE>
201
202<BR>
203&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Finds an executable that is part of a JRE installation based on
204 the java.home system property.</TD>
205</TR>
206<TR BGCOLOR="white" CLASS="TableRowColor">
207<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
208<CODE>static&nbsp;java.util.Vector</CODE></FONT></TD>
209<TD><CODE><B><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#getJrePackages()">getJrePackages</A></B>()</CODE>
210
211<BR>
212&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;get a vector of strings of packages built into
213 that platforms runtime jar(s)</TD>
214</TR>
215<TR BGCOLOR="white" CLASS="TableRowColor">
216<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
217<CODE>static&nbsp;java.util.Vector</CODE></FONT></TD>
218<TD><CODE><B><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#getJrePackageTestCases()">getJrePackageTestCases</A></B>()</CODE>
219
220<BR>
221&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Testing helper method; kept here for unification of changes.</TD>
222</TR>
223<TR BGCOLOR="white" CLASS="TableRowColor">
224<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
225<CODE>static&nbsp;boolean</CODE></FONT></TD>
226<TD><CODE><B><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#isJavaVersion(java.lang.String)">isJavaVersion</A></B>(java.lang.String&nbsp;version)</CODE>
227
228<BR>
229&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Compares the current Java version to the passed in String -
230 assumes the argument is one of the constants defined in this
231 class.</TD>
232</TR>
233<TR BGCOLOR="white" CLASS="TableRowColor">
234<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
235<CODE>static&nbsp;boolean</CODE></FONT></TD>
236<TD><CODE><B><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#isKaffe()">isKaffe</A></B>()</CODE>
237
238<BR>
239&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Checks whether the current Java VM is Kaffe.</TD>
240</TR>
241</TABLE>
242&nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
243<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
244<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
245<TD><B>Methods inherited from class java.lang.Object</B></TD>
246</TR>
247<TR BGCOLOR="white" CLASS="TableRowColor">
248<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
249</TR>
250</TABLE>
251&nbsp;
252<P>
253
254<!-- ============ FIELD DETAIL =========== -->
255
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259<TD COLSPAN=1><FONT SIZE="+2">
260<B>Field Detail</B></FONT></TD>
261</TR>
262</TABLE>
263
264<A NAME="JAVA_1_0"><!-- --></A><H3>
265JAVA_1_0</H3>
266<PRE>
267public static final java.lang.String <B>JAVA_1_0</B></PRE>
268<DL>
269<DD>Version constant for Java 1.0
270<P>
271<DL>
272<DT><B>See Also:</B><DD><A HREF="../../../../../constant-values.html#org.apache.tools.ant.util.JavaEnvUtils.JAVA_1_0">Constant Field Values</A></DL>
273</DL>
274<HR>
275
276<A NAME="JAVA_1_1"><!-- --></A><H3>
277JAVA_1_1</H3>
278<PRE>
279public static final java.lang.String <B>JAVA_1_1</B></PRE>
280<DL>
281<DD>Version constant for Java 1.1
282<P>
283<DL>
284<DT><B>See Also:</B><DD><A HREF="../../../../../constant-values.html#org.apache.tools.ant.util.JavaEnvUtils.JAVA_1_1">Constant Field Values</A></DL>
285</DL>
286<HR>
287
288<A NAME="JAVA_1_2"><!-- --></A><H3>
289JAVA_1_2</H3>
290<PRE>
291public static final java.lang.String <B>JAVA_1_2</B></PRE>
292<DL>
293<DD>Version constant for Java 1.2
294<P>
295<DL>
296<DT><B>See Also:</B><DD><A HREF="../../../../../constant-values.html#org.apache.tools.ant.util.JavaEnvUtils.JAVA_1_2">Constant Field Values</A></DL>
297</DL>
298<HR>
299
300<A NAME="JAVA_1_3"><!-- --></A><H3>
301JAVA_1_3</H3>
302<PRE>
303public static final java.lang.String <B>JAVA_1_3</B></PRE>
304<DL>
305<DD>Version constant for Java 1.3
306<P>
307<DL>
308<DT><B>See Also:</B><DD><A HREF="../../../../../constant-values.html#org.apache.tools.ant.util.JavaEnvUtils.JAVA_1_3">Constant Field Values</A></DL>
309</DL>
310<HR>
311
312<A NAME="JAVA_1_4"><!-- --></A><H3>
313JAVA_1_4</H3>
314<PRE>
315public static final java.lang.String <B>JAVA_1_4</B></PRE>
316<DL>
317<DD>Version constant for Java 1.4
318<P>
319<DL>
320<DT><B>See Also:</B><DD><A HREF="../../../../../constant-values.html#org.apache.tools.ant.util.JavaEnvUtils.JAVA_1_4">Constant Field Values</A></DL>
321</DL>
322<HR>
323
324<A NAME="JAVA_1_5"><!-- --></A><H3>
325JAVA_1_5</H3>
326<PRE>
327public static final java.lang.String <B>JAVA_1_5</B></PRE>
328<DL>
329<DD>Version constant for Java 1.5
330<P>
331<DL>
332<DT><B>See Also:</B><DD><A HREF="../../../../../constant-values.html#org.apache.tools.ant.util.JavaEnvUtils.JAVA_1_5">Constant Field Values</A></DL>
333</DL>
334
335<!-- ========= CONSTRUCTOR DETAIL ======== -->
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344<B>Method Detail</B></FONT></TD>
345</TR>
346</TABLE>
347
348<A NAME="getJavaVersion()"><!-- --></A><H3>
349getJavaVersion</H3>
350<PRE>
351public static java.lang.String <B>getJavaVersion</B>()</PRE>
352<DL>
353<DD>Returns the version of Java this class is running under.
354<P>
355<DD><DL>
356
357<DT><B>Returns:</B><DD>the version of Java as a String, e.g. "1.1"</DL>
358</DD>
359</DL>
360<HR>
361
362<A NAME="isJavaVersion(java.lang.String)"><!-- --></A><H3>
363isJavaVersion</H3>
364<PRE>
365public static boolean <B>isJavaVersion</B>(java.lang.String&nbsp;version)</PRE>
366<DL>
367<DD>Compares the current Java version to the passed in String -
368 assumes the argument is one of the constants defined in this
369 class.
370<P>
371<DD><DL>
372<DT><B>Parameters:</B><DD><CODE>version</CODE> - the version to check against the current version.
373<DT><B>Returns:</B><DD>true if the version of Java is the same as the given version.<DT><B>Since:</B></DT>
374 <DD>Ant 1.5</DD>
375</DL>
376</DD>
377</DL>
378<HR>
379
380<A NAME="isKaffe()"><!-- --></A><H3>
381isKaffe</H3>
382<PRE>
383public static boolean <B>isKaffe</B>()</PRE>
384<DL>
385<DD>Checks whether the current Java VM is Kaffe.
386<P>
387<DD><DL>
388
389<DT><B>Returns:</B><DD>true if the current Java VM is Kaffe.<DT><B>Since:</B></DT>
390 <DD>Ant 1.6.3</DD>
391<DT><B>See Also:</B><DD><CODE>http://www.kaffe.org/</CODE></DL>
392</DD>
393</DL>
394<HR>
395
396<A NAME="getJreExecutable(java.lang.String)"><!-- --></A><H3>
397getJreExecutable</H3>
398<PRE>
399public static java.lang.String <B>getJreExecutable</B>(java.lang.String&nbsp;command)</PRE>
400<DL>
401<DD>Finds an executable that is part of a JRE installation based on
402 the java.home system property.
403
404 <p><code>java</code>, <code>keytool</code>,
405 <code>policytool</code>, <code>orbd</code>, <code>rmid</code>,
406 <code>rmiregistry</code>, <code>servertool</code> and
407 <code>tnameserv</code> are JRE executables on Sun based
408 JRE's.</p>
409
410 <p>You typically find them in <code>JAVA_HOME/jre/bin</code> if
411 <code>JAVA_HOME</code> points to your JDK installation. JDK
412 &lt; 1.2 has them in the same directory as the JDK
413 executables.</p>
414<P>
415<DD><DL>
416<DT><B>Parameters:</B><DD><CODE>command</CODE> - the java executable to find.
417<DT><B>Returns:</B><DD>the path to the command.<DT><B>Since:</B></DT>
418 <DD>Ant 1.5</DD>
419</DL>
420</DD>
421</DL>
422<HR>
423
424<A NAME="getJdkExecutable(java.lang.String)"><!-- --></A><H3>
425getJdkExecutable</H3>
426<PRE>
427public static java.lang.String <B>getJdkExecutable</B>(java.lang.String&nbsp;command)</PRE>
428<DL>
429<DD>Finds an executable that is part of a JDK installation based on
430 the java.home system property.
431
432 <p>You typically find them in <code>JAVA_HOME/bin</code> if
433 <code>JAVA_HOME</code> points to your JDK installation.</p>
434<P>
435<DD><DL>
436<DT><B>Parameters:</B><DD><CODE>command</CODE> - the java executable to find.
437<DT><B>Returns:</B><DD>the path to the command.<DT><B>Since:</B></DT>
438 <DD>Ant 1.5</DD>
439</DL>
440</DD>
441</DL>
442<HR>
443
444<A NAME="getJrePackageTestCases()"><!-- --></A><H3>
445getJrePackageTestCases</H3>
446<PRE>
447public static java.util.Vector <B>getJrePackageTestCases</B>()</PRE>
448<DL>
449<DD>Testing helper method; kept here for unification of changes.
450<P>
451<DD><DL>
452
453<DT><B>Returns:</B><DD>a list of test classes depending on the java version.</DL>
454</DD>
455</DL>
456<HR>
457
458<A NAME="getJrePackages()"><!-- --></A><H3>
459getJrePackages</H3>
460<PRE>
461public static java.util.Vector <B>getJrePackages</B>()</PRE>
462<DL>
463<DD>get a vector of strings of packages built into
464 that platforms runtime jar(s)
465<P>
466<DD><DL>
467
468<DT><B>Returns:</B><DD>list of packages.</DL>
469</DD>
470</DL>
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