【拿來主義】之Java工具類－List 排序 - 悠～游

昵稱68veS 2007-01-11

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/**
#############################################################################
# DESCRIBE 關(guān)于給Vector，ArrayList和LinkedList特定List集合排序的方法
# AUTHOR 悠～游
# DATE 2006-7-12
# COMPANY FLX
# PORJECT JAVA
#############################################################################
*/
import java.io.PrintStream;
import java.text.CollationKey;
import java.text.Collator;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

public class SortList {

public static void main(String args[]) {
  String words[] = { "man", "Man", "Woman", "woman", "Manana", "manana", "ma?ana", "Ma?ana", "Mantra", "mantra",
    "mantel", "Mantel" };

  PrintStream out = System.out;

  List list = new ArrayList(Arrays.asList(words));
  out.println("傳入的list:");
  out.println(list);
  out.println();

  Collections.sort(list);
  out.println("默認(rèn)的sorting:");
  out.println(list);
  out.println();

  list = new ArrayList(Arrays.asList(words));
  Comparator comp = Collections.reverseOrder();
  Collections.sort(list, comp);
  out.println("反向sorting:");
  out.println(list);
  out.println();

  list = new ArrayList(Arrays.asList(words));
  comp = new CollatorComparator();
  Collections.sort(list, comp);
  out.println("自定義排序sorting:");
  out.println(list);
  out.println();

  list = new ArrayList(Arrays.asList(words));
  comp = new CaseInsensitiveComparator();
  Collections.sort(list, comp);
  out.println("按照語種sorting:");
  out.println(list);
  out.println();

}

/**
#############################################################################
#
# @DESCRIBE 自定義的排序規(guī)則
# @author Administrator
#
#############################################################################
*/
public static class CaseInsensitiveComparator implements Comparator {
  public int compare(Object element1, Object element2) {
   String lower1 = element1.toString().toLowerCase();
   String lower2 = element2.toString().toLowerCase();
   return lower1.compareTo(lower2);
  }
}
/**
#############################################################################
#
# @DESCRIBE 按照語種進(jìn)行排序的規(guī)則
# @author Administrator
#
#############################################################################
*/
public static class CollatorComparator implements Comparator {
  Collator collator = Collator.getInstance();

  public int compare(Object element1, Object element2) {
   CollationKey key1 = collator.getCollationKey(element1.toString());
   CollationKey key2 = collator.getCollationKey(element2.toString());
   return key1.compareTo(key2);
  }
}
}