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How can I import static members from another class?

User_LX1YUJan 31 2021

I'm trying to import static members from another class. The code examples below are in separate .java files. TestStaticClassMember is compiled first using:
javac TestStaticClassMember.java
followed by:
javac TestClass.java
TestStaticClassMember is not a recognised symbol to TestClass using the import construct:
import static TestStaticClassMembers.*;
featured within the examples below. Why is that?
public class TestStaticClassMember {
public static double getDate(double in)
{
return in;
}
}
import static TestStaticClassMember.*;
public class TestClass{
}
I've tried to recreate the compile error from the class RandomUtil.java (which has static members) and Branch.java that wants to use those static members from RandomUtil.
These classes are in the tree package from tree_animation found in the Oracle documentation.

Comments

Peter Gjelstrup
Answer
1. What is the difference between the below 2 index usage scenarios:
/*+ index(a index_name) parallel(a,4)*/
/*+ parallel_index(a,index_name,4)*/
Are both these same?
No,
First are two hints, one to use index and one to instruct the optimizer to use 4 concurrent servers for a parallel operation

The second is just one hint. it tells optimizer to use 4 concurrent servers on partitioned indexes.
2. What is full index scan and fast full index scan?
Full index scan do single block reads.
Fast full scan do multi block reads.

3. I have a table created in database and it has a few indexes on some columns. How can I check whether the index is Bitmap or B-Tree ?
In user_|all_dba_indexes. Index_type will be BITMAP or NORMAL

Regards
Peter


P.S: Speaking of hints. Bookmark this, can answer most of such questions much better than I can:
http://www.oracle.com/pls/db112/homepage

Edited by: Peter on Mar 26, 2013 1:47 PM
Marked as Answer by AB312062 · Sep 27 2020
AB312062
Thanks Peter !

Can you tell more about the difference in using index and parallel_index. I din't fully understand. If you could explain with some example or provide some link where I can find more information, that would be helpful.

Regards
AB
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Added on Jan 31 2021
#java, #javafx, #javafx-2-0-and-later, #tree
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