Can't import any java classes - ceylon

Question

HelloWorld.ceylon
import java.util { HashMap } //Error:(1, 8) ceylon: package not found in imported modules: java.util (define a module and add module import to its module descriptor)
void run() {
print("test");
}
module.properties
module CeylonHelloWorld "1.0" {
import java.base "8";
}
I get an exception in HelloWord.ceylon file

Answer 1

When I try that code, I get:
Incorrect syntax: mismatched token CeylonHelloWorld expecting initial-lowercase identifier
In module.ceylon.
The name of a module is supposed to be of form foo.bar.baz (initial-lowercase identifiers separated by periods).

Answer 2

Like mentioned by Gavin you will have to use a legal module name, when I change your code to use the module name "java8test" I get the following output when compiling:
$ ceylon compile java8test
warning: It looks like you are using class files from a Java newer than 1.7.
Everything should work well, but if not, let us know at https://github.com/ceylon/ceylon-compiler/issues.
In the near future, the Ceylon compiler will be upgraded to handle Java 1.8.
./source/java8test/run.ceylon:1: warning: import is never used: 'HashMap'
import java.util { HashMap }
^
2 warnings
Note: Created module java8test/1.0.0
Which is all as expected.

Answer 3

module.ceylon
module holaCeylon "1.0.0"{
import java.base "7"; // versión 7 JDK
}
package.ceylon
shared package holaCeylon;
Now we go back to the run.ceylon file and import the java.util.HashMap Java library.
run.ceylon
import java.util { HashMap }
shared void run(){
print("Importando librerias de Java en Ceylon");
value romanos = HashMap<String,Integer>();
romanos.put("I", 1);
romanos.put("V", 5);
romanos.put("X", 10);
romanos.put("L", 50);
romanos.put("C", 100);
romanos.put("D", 500);
romanos.put("M", 1000);
print(romanos.values());
print(romanos.keySet());
}
Output:
salida
Code:
http://codemonkeyjunior.blogspot.mx/2015/03/ceylon-interoperabilidad-con-java.html