java list 排序主要用到: Collections.sort方法:

package com.tom.compare;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

import java.util.List;

public class CompareClient {

/**

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

List list = new ArrayList();

list.add(new Content(15000,"1asdfasd5000"));

list.add(new Content(10000,"10000"));

list.add(new Content(20000,"20000"));

list.add(new Content(30000,"30000"));

list.add(new Content(25000,"25000"));

list.add(new Content(13000,"13000"));

list.add(new Content(15000,"15000"));

list.add(new Content(89000,"89000"));

ContentComparator comp = new ContentComparator();

Collections.sort(list,comp);

Content content;

for(int i = 0; i < list.size(); i++){

content = (Content)list.get(i);

System.out.println(" content.getName() " + content.getName());

}

}

}

package com.tom.compare;

import java.util.Comparator;

public class ContentComparator implements Comparator {

public int compare(Object o1, Object o2) {

// TODO Auto-generated method stub

Content c1 = (Content) o1;

Content c2 = (Content) o2;

if (c1.getKey() > c2.getKey()) {

return 1;

} else {

if (c1.getKey() == c2.getKey()) {

return 0;

} else {

return -1;

}

}

}

}

package com.tom.compare;

public class Content {

private long key;

private String name;

public Content(long key, String name) {

this.key = key;

this.name = name;

}

public long getKey() {

return key;

}

public void setKey(long key) {

this.key = key;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

}

結果是:

content.getName() 10000

content.getName() 13000

content.getName() 1asdfasd5000

content.getName() 15000

content.getName() 20000

content.getName() 25000

content.getName() 30000

content.getName() 89000

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