PriorityQueue containing "Pairs" in reverse numerical order Java -

-

I am trying to create a preference that holds its elements behind the natural order (integer pairs) But we have found serious tips, but in every case it has given the same wrong order. 

  priority question & lt; Pair & gt; Pq = New Priority Question (4, New Comparative & Lt; Pair & gt; () {Comparison of Public Entry (pair A1, pair A2) {return a2.value.compareTo (a1.value);}}); Pq.add (new pair (1,15)); Pq.add (new pair (2,58)); Pq.add (new pair (3,55)); Pq.add (new pair (723)); Iterator & LT; Pair & gt; This = pq.iterator (); While (this hasNext ()) {System.out.println (it.next (). Value); }   
  
 There is a pair class  
  
  applies public class jury Comparable {public Integer Name; Public integer value; Public pair (int name, int value) {this.name = name; This.value = value; } Public int getname () {return name; } Public receipt value () {return value; } Comparison of public int (pair o1, pair o2) {pair 1 = (pair) o 1; Pair A2 = (pair) O2; If (a1.value & gt; a2.value) {return1; } And if (a1.value & lt; a2.value) {return -1; } Return 0; } @ Override Public Ent Hashod () {Inti hash = 3; Return hash; } @ Override Public Boolean Parabar (object o) {pair A2 = (pair) o; This .name == a2.name & amp; Amp; This.value == a2.value; } To compute public int (object o) {pair a2 = (pair) o; If (this.value & gt; a2.value) {return1; } And if (this.value & lt; a2.value) {return -1; } Return 0; }   
}  
 If I use the "new priority question ()" constructor, then it gives proper natural order. Thank you for your time, mark   
 
 
 from the  PriorityQueue.iterator ()  
 
 Returns an Iterator above the elements in this line The itater does not return the elements in a particular sequence.   
 If you want to prioritize them, then  poll ()  code> empty :  
  Couple pair; While ((pair = pq.poll ()) = tap) {System.out.println (pair.value); }   
 She prints 58, 55, 23, 15, just as you were looking for.

Comments

Post a Comment

Popular posts from this blog

qt - switch/case statement in C++ with a QString type -

-
I want to use switch-case in my program but the compiler generates an error. How can I use the switch statement with QString ? The compiler gives me this error: The expression of the switch type 'QString' is invalid My code is as follows : boolStopWord (the word QString) {bool flag = false; Switch (word) {case "the": flag = true; break ; "On" case: flag = true; break ; Case "in": flag = true; break ; Case "your": flag = true; break ; Case "near": flag = true; break ; Case "all": flag = true; break ; Case "this": flag = true; break ; } Return flag; } How do I use the switch statement with a Caststring ? You can not use the switch statement in C ++ language with integral or enum types. You can formally enter the square type of object in the switch statement, but this means that the compiler will look for a user-defined conversion to convert it to an integral or enum type.
Read more

python - sqlite3.OperationalError: near "REFERENCES": syntax error - foreign key creating -

-
I'm trying to create a predefined key after checking the manual and I wrote it: Db.execute ("create table" Table 2 (id, integer primary key, somedata integer) "db.execute" (table creation table 2 does not exist (name text, maintain reference (id) ") and found this: sqlite 3. Operation error: near" references ": syntax error Your second ligne is wrong db.execute ("create table if table does not exist 2 (name text, my_id integer, foreign key (my_id) reference Maintenance (ID)) ") as explained
Read more

Python's equivalent for Ruby's define_method? -

-
What is a Python equivalent for Ruby's define_method , which is the dynamic generation of class methods will allow? (As can be seen in Wikipedia) Functions are first-class objects in Python and assign them The properties of a class or an example can be a way of doing the same thing as a Wikipedia example: colors = {"black": "000", "red": "F00", "green": "0f0", "yellow": "ff0", "blue": "00f", "magenta": "fff", "cyan": "0ff", "white": " FFF "} Class MyStream (ARR): Pass for Name, Code in colors.iteritems (): def _in_colour ( W code = code): return '& lt; Span style = "color:% s" & gt;% s & lt; / Span & gt; ' % (Code, self) setter (histrive, "in_" + name, _in_ color)
Read more