JDK-7161754 : Compiler Error when trying to compile strings in a switch
  • Type: Bug
  • Component: tools
  • Sub-Component: javac
  • Affected Version: 7
  • Priority: P4
  • Status: Closed
  • Resolution: Duplicate
  • OS: windows_vista
  • CPU: x86
  • Submitted: 2012-04-16
  • Updated: 2012-04-24
  • Resolved: 2012-04-24
Related Reports
Duplicate :  
Description
FULL PRODUCT VERSION :
1.7.0_01

FULL OS VERSION :
Windows Vista 32 bit

A DESCRIPTION OF THE PROBLEM :
While building a JavaFX 2.0 application i wanted to use the new string in switches feature on the "KeyEvent" class of JavaFX.

I wanted to switch on the different types of KeyEvents, i.e. "KEY_PRESSED" or "KEY_RELEASED".

THE PROBLEM WAS REPRODUCIBLE WITH -Xint FLAG: Did not try

THE PROBLEM WAS REPRODUCIBLE WITH -server FLAG: Did not try

ERROR MESSAGES/STACK TRACES THAT OCCUR :
An exception has occurred in the compiler (1.7.0_01). 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.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 ----------
@Override
    public void handle(KeyEvent evt)
    {
        switch(evt.getEventType().getName())
        {
            case("KEY_PRESSED"):
                System.out.println("key pressed");
                break;
            case("KEY_RELEASED"):
                System.out.println("key released");
                break;
            default:
        }
    }
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Workaround would be to use consecutive if/else if conditions, but i couldn��t manage to run this with strings in switch