java_tutorial

Java
}
};
Thread t = new Thread(runner);
t.start();
System.out.println("Main waiting");
try {
t.join();
} catch (InterruptedException ignored) {
}
}
This will produce the following result:
ain waiting
Thread waiting
If you do not include the call to System.gc(), the system may never run the garbage
collector as not much memory is used by the program. For a more active program, the
call would be unnecessary.
The LinkedHashMap Class
This class extends HashMap and maintains a linked list of the entries in the map, in the
order in which they were inserted. This allows insertion-order iteration over the map. That
is, when iterating a LinkedHashMap, the elements will be returned in the order in which
they were inserted.
You can also create a LinkedHashMap that returns its elements in the order in which they
were last accessed.
Following is the list of constructors supported by the LinkedHashMap class.
Sr.
No.
Constructors and Description
1
LinkedHashMap( )
This constructor constructs a default LinkedHashMap.
LinkedHashMap(Map m)
2
This constructor initializes the LinkedHashMap with the elements from the
given Map class m.
415