Collections中的常用方法及排序

import java.util.*;
/**
* @(#)SortTest.java
*
* SortTest application
*
* @author
* @version 1.00 2007/3/15
*/

public class SortTest {

public static void main(String[] args) {

// TODO, add your application code
System.out.println("Hello World!");
double [] array = {123, 456, 23, 23, 78, 897};
List list = new ArrayList();
List li = new ArrayList();
for(int i=0; i<array.length; i++){
list.add(new Double(array[i]));
}
System.out.println("原始:" + list.toString());

//升序
Collections.sort(list);
System.out.println("升序:" + list.toString());

//混排
Collections.shuffle(list);
System.out.println("混排:" + list.toString());

//降序
Collections.reverse(list);
System.out.println("降序:" + list.toString());

//替换
List l2 = new ArrayList();
for(int i=0; i<list.size(); i++){
l2.add(list.get(i));
}
Collections.fill(l2, "test");
System.out.println("替换后:" + l2);
System.out.println("替换后的原始值:" + list);

//拷贝
double [] num = {1024, 768};
List l3 = new ArrayList();
for(int i=0; i<num.length; i++){
l3.add(new Double(num[i]));
}
System.out.println("拷贝源:" + l3.toString());
Collections.copy(list, l3);
System.out.println("拷贝完成，目标为:" + list.toString());

//最小值
System.out.println("最小值是：" + Collections.min(list));

//最大值
System.out.println("最大值是：" + Collections.max(list));

//lastIndexOfSubList
double [] num2 = {23};
List l4 = new ArrayList();
for(int i=0; i<num2.length; i++){
l4.add(new Double(num2[i]));
}
System.out.println(":" + Collections.lastIndexOfSubList(list, l4));

//IndexOfSubList
double [] num3 = {23};
List l5 = new ArrayList();
for(int i=0; i<num3.length; i++){
l5.add(new Double(num3[i]));
}
System.out.println(":" + Collections.indexOfSubList(list, l5));

//旋转
System.out.println("旋转前:" + list);
Collections.rotate(list, -2);
System.out.println("旋转(正向):" + list);
}
}