java lisi亂序、排序

package com.gcj.test;

import java.text.ParseException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
/**


排序Test
@author youps-a
@version $Id: Test.java, v 0.1 2015年5月22日 下午8:04:45 youps-a Exp $
*/
public class Test {
@SuppressWarnings({ "unchecked", "rawtypes" })
 public static void main(String[] args) throws ParseException {

 /**排序方法簡單使用*/
 List list = Arrays.asList(1,2,3,4,5,6,7,8,9);   //定義個list
 System.out.println("原  順  序"+list.toString());

 Collections.shuffle(list);  
 System.out.println("打亂順序"+list.toString());

 Collections.sort(list);
 System.out.println("正序排列"+list.toString());

 Collections.sort(list, Collections.reverseOrder());
 System.out.println("逆序排列"+list.toString());

 /**排序方法復雜使用*/
 List<TestBean> testList = new ArrayList<TestBean>();
 for (int i = 0; i < 10; i++) {
     TestBean testBean = new TestBean();
     testBean.setId(i);
     testBean.setName("name"+i);
     testList.add(testBean);
 }
 //定義一個TestBean 類型的list 并打亂進行測試
 Collections.shuffle(testList);  
 for (int i = 0; i < testList.size(); i++) {
     System.out.println("testList亂序  "+testList.get(i).toString());
 }
 System.out.println();
 //根據TestBean 的 id 屬性進行排序，需重載實現
 Collections.sort(testList, new Comparator<TestBean>() {
     @Override
     public int compare(TestBean o1, TestBean o2) {
         // 實現正序排列
         return o1.getId().compareTo(o2.getId());
     }
 });
 for (int i = 0; i < testList.size(); i++) {
     System.out.println("testList正序  "+testList.get(i).toString());
 }
 System.out.println();
 //再次打亂順序
 Collections.shuffle(testList);  
 //依舊重載方法
 Collections.sort(testList, new Comparator<TestBean>() {
     @Override
     public int compare(TestBean o1, TestBean o2) {
         // 實現倒序排列
         return o2.getId().compareTo(o1.getId());
     }
 });
 for (int i = 0; i < testList.size(); i++) {
     System.out.println("testList倒序  "+testList.get(i).toString());
 }


}


}
//測試bean
class TestBean {
    //注意需使用 Integer 或Long 等包裝類型
    private Integer id;
    private String name;
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    @Override
    public String toString() {
        // TODO Auto-generated method stub
        return "id:"+this.getId()+",name:"+this.getName();
    }
}
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