Utte at 07:58, 5 October 2011

2011-10-05T07:58:02Z

Utte: Created page with "= Opgaver = == Kapitel 12 == === Opgave 3 === ==== Main ==== package comparator; import java.util.*; public class sorting { public static void main(S..."

2011-10-05T07:55:45Z

Created page with "= Opgaver = == Kapitel 12 == === Opgave 3 === ==== Main ==== <source lang="java">package comparator; import java.util.*; public class sorting { public static void main(S..."

New page

= Opgaver =

== Kapitel 12 ==

=== Opgave 3 ===

==== Main ====

<source lang="java">package comparator;

import java.util.*;
public class sorting {
public static void main(String[] args) {
ArrayList list = new ArrayList();
list.add("tiktak");
list.add("egern");
list.add("kæmpeegern");
list.add("somebodywashere");
list.add("wtf");
list.add("java");
list.add("træls");
list.add("kurt");
list.add("green");
list.add("c#ftw");

Collections.sort(list,new NormalComparable());

print(list);

Collections.sort(list,new ReverseCompare());

print(list);

Collections.sort(list,new SecondCharCompare());

print(list);

}

public static void print(ArrayList list)
{
for(Object str : list)
{
System.out.println(str.toString());
}
}
}</source>

==== Ascending Compare ====

<source lang="java">package comparator;

import java.util.*;

public class AscendingCompare implements Comparator<String>
{
@Override
public int compare(String o1, String o2) {
return o1.compareTo(o2); //Her sammenligner vi o1 med o2.
}
}</source>

==== Descending Compare ====

<source lang="java">package comparator;

import java.util.*;

public class DescendingCompare implements Comparator<String>
{
@Override
public int compare(String o1, String o2) {
return o2.compareTo(o1); //Her gør vi det omvendt. o2 sammenligner vi med o1.
}
}</source> 

==== SecondCharAscendingCompare ====

<source lang="java">package comparator;

import java.util.*;

public class SecondCharAscendingCompare implements Comparator<String>
{
@Override
public int compare(String o1, String o2) {
return o1.charAt(1) - o2.charAt(1); //Her tager vi 2nd tegn og bruger char værdien.
}
}</source>

@@ Line 5: / Line 5: @@
 === Opgave 3 ===
-==== Main ====
+==== Main  ====
 <source lang="java">package comparator;
@@ Line 24: / Line 24: @@
          list.add("c#ftw");
-         Collections.sort(list,new NormalComparable());
+         Collections.sort(list,new AscendingCompare());
          print(list);
-         Collections.sort(list,new ReverseCompare());
+         Collections.sort(list,new DescendingCompare());
          print(list);
-         Collections.sort(list,new SecondCharCompare());
+         Collections.sort(list,new SecondCharAscendingCompare());
          print(list);

2011-40-Java3 - Revision history

Utte at 07:58, 5 October 2011

Utte: Created page with "= Opgaver = == Kapitel 12 == === Opgave 3 === ==== Main ==== package comparator; import java.util.*; public class sorting { public static void main(S..."