Re: Stranger compiler error?

From:
"Daniel Pitts" <googlegroupie@coloraura.com>
Newsgroups:
comp.lang.java.programmer
Date:
10 Nov 2006 11:36:32 -0800
Message-ID:
<1163187391.717014.151120@m7g2000cwm.googlegroups.com>
Knute Johnson wrote:

I found a strange compiler error when writing the code below. The next
program compiles and runs fine. In fact if I replace the error line
with the null statement it compiles just fine or if I just put the
braces around the error line it compiles. Needless to say, this has
been driving me nuts all morning!

Win XP Pro SP2
JDK 1.6.0-rc build 103

I haven't tried it on an older compiler.

Any ideas?

Thanks,

knute...

import java.util.*;

public class test1 {
     public static void main(String[] args) throws Exception {
         Hashtable<Integer,String[]> hash =
          new Hashtable<Integer,String[]>();
         hash.put(1,new String[] {"hello","world"});
         hash.put(2,new String[] {"good","bye"});

         for (Enumeration<Integer> e=hash.keys(); e.hasMoreElements();)
             String[] array = hash.get(e.nextElement()); // <---- error
     }
}

C:\com\knutejohnson\redrock\scores>javac test1.java
test1.java:10: '.class' expected
             String[] array = hash.get(e.nextElement());
                      ^
test1.java:10: not a statement
             String[] array = hash.get(e.nextElement());
                   ^
2 errors

import java.util.*;

public class test1 {
     public static void main(String[] args) throws Exception {
         Hashtable<Integer,String[]> hash =
          new Hashtable<Integer,String[]>();
         hash.put(1,new String[] {"hello","world"});
         hash.put(2,new String[] {"good","bye"});

         for (Enumeration<Integer> e=hash.keys(); e.hasMoreElements();) {
             String[] array = hash.get(e.nextElement());
             for (int i=0; i<array.length; i++)
                 System.out.println(array[i]);
         }
     }
}

--

Knute Johnson
email s/nospam/knute/

You can't declare a variable in a one-statement block.
if (true) int something=10; // fails
if (true) { int something=10; } // succeeds.

Also, why not use HashMap?
Map<Integer, String[]> hash = new HashMap<Integer, String[]>();
// Do something with hash
for (Map.Entry<Integer, String[]> entry : hash.entrySet()) {
    System.out.print(entry.getKey() + "->{");
    for (String string : entry.getValue()) {
           System.out.print(string + ", ");
    }
   System.out.println("}");
}

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