FULL PRODUCT VERSION :
$ /usr/jdk/instances/jdk1.7.0/bin/java -version
java version "1.7.0"
Java(TM) SE Runtime Environment (build 1.7.0-b148)
Java HotSpot(TM) Server VM (build 21.0-b18, mixed mode)
$ /usr/jdk/instances/jdk1.7.0/bin/java -d64 -version
java version "1.7.0"
Java(TM) SE Runtime Environment (build 1.7.0-b148)
Java HotSpot(TM) 64-Bit Server VM (build 21.0-b18, mixed mode)
$ /usr/jdk/instances/jdk1.7.0/bin/javac -version
javac 1.7.0
$ /usr/jdk/instances/jdk1.7.0/bin/javac -d64 -version
javac 1.7.0
ADDITIONAL OS VERSION INFORMATION :
$ more /etc/release
Oracle Solaris 11 11/11 X86
Copyright (c) 1983, 2011, Oracle and/or its affiliates. All rights reserved.
Assembled 11 October 2011
$ uname -a
SunOS perf2270-59 5.11 11.0 i86pc i386 i86pc
A DESCRIPTION OF THE PROBLEM :
Use of the below code in Switc-String results in javac failure:
case ("a"):
STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
$ cat >SwitchStringBug.java <EOF
public class SwitchStringBug extends Thread {
public static void main(String[] args) {
for (String arg : args) {
switch (arg) {
case ("a"):
System.err.println("A");
break;
}
}
}
} /** End Class. */
EOF
$ /usr/jdk/instances/jdk1.7.0/bin/javac SwitchStringBug.java
EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
javac exit with status 0 and compiled SwitchStringBug.class file.
ACTUAL -
javac exit with status 4 and no compiled SwitchStringBug.class file.
ERROR MESSAGES/STACK TRACES THAT OCCUR :
$ /usr/jdk/instances/jdk1.7.0/bin/javac SwitchStringBug.java
An exception has occurred in the compiler (1.7.0). Please file a bug at the Java Developer Connection (http://java.sun.com/webapps/bugreport) after checking the Bug Parade for duplicates. Include your program and the following diagnostic in your report. Thank you.
java.lang.NullPointerException
at com.sun.tools.javac.comp.Lower.visitStringSwitch(Lower.java:3456)
at com.sun.tools.javac.comp.Lower.visitSwitch(Lower.java:3357)
at com.sun.tools.javac.tree.JCTree$JCSwitch.accept(JCTree.java:959)
at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
at com.sun.tools.javac.comp.Lower.translate(Lower.java:2160)
at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
at com.sun.tools.javac.tree.TreeTranslator.visitBlock(TreeTranslator.java:160)
at com.sun.tools.javac.comp.Lower.visitBlock(Lower.java:3311)
at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:781)
at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
at com.sun.tools.javac.comp.Lower.translate(Lower.java:2160)
at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
at com.sun.tools.javac.tree.TreeTranslator.visitBlock(TreeTranslator.java:160)
at com.sun.tools.javac.comp.Lower.visitBlock(Lower.java:3311)
at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:781)
at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
at com.sun.tools.javac.comp.Lower.translate(Lower.java:2160)
at com.sun.tools.javac.comp.Lower.visitForLoop(Lower.java:3332)
at com.sun.tools.javac.tree.JCTree$JCForLoop.accept(JCTree.java:872)
at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
at com.sun.tools.javac.comp.Lower.translate(Lower.java:2160)
at com.sun.tools.javac.comp.Lower.visitArrayForeachLoop(Lower.java:3196)
at com.sun.tools.javac.comp.Lower.visitForeachLoop(Lower.java:3135)
at com.sun.tools.javac.tree.JCTree$JCEnhancedForLoop.accept(JCTree.java:907)
at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
at com.sun.tools.javac.comp.Lower.translate(Lower.java:2160)
at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
at com.sun.tools.javac.tree.TreeTranslator.visitBlock(TreeTranslator.java:160)
at com.sun.tools.javac.comp.Lower.visitBlock(Lower.java:3311)
at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:781)
at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
at com.sun.tools.javac.comp.Lower.translate(Lower.java:2160)
at com.sun.tools.javac.tree.TreeTranslator.visitMethodDef(TreeTranslator.java:144)
at com.sun.tools.javac.comp.Lower.visitMethodDefInternal(Lower.java:2619)
at com.sun.tools.javac.comp.Lower.visitMethodDef(Lower.java:2538)
at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:669)
at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
at com.sun.tools.javac.comp.Lower.translate(Lower.java:2160)
at com.sun.tools.javac.comp.Lower.visitClassDef(Lower.java:2283)
at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:591)
at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
at com.sun.tools.javac.comp.Lower.translate(Lower.java:2160)
at com.sun.tools.javac.comp.Lower.translate(Lower.java:2180)
at com.sun.tools.javac.comp.Lower.translateTopLevelClass(Lower.java:3650)
at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1393)
at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1271)
at com.sun.tools.javac.main.JavaCompiler.compile2(JavaCompiler.java:870)
at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:829)
at com.sun.tools.javac.main.Main.compile(Main.java:417)
at com.sun.tools.javac.main.Main.compile(Main.java:331)
at com.sun.tools.javac.main.Main.compile(Main.java:322)
at com.sun.tools.javac.Main.compile(Main.java:76)
at com.sun.tools.javac.Main.main(Main.java:61)
REPRODUCIBILITY :
This bug can be reproduced always.
---------- BEGIN SOURCE ----------
public class SwitchStringBug extends Thread {
public static void main(String[] args) {
for (String arg : args) {
switch (arg) {
case ("a"):
System.err.println("A");
break;
}
}
}
} /** End Class. */
---------- END SOURCE ----------
CUSTOMER SUBMITTED WORKAROUND :
Use traditional "if/elseif/else" coding style.
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Java