Java 给ArrayList中的元素去重且顺序不变

http://my.oschina.net/isxiaoge/blog/492801

import java.util.ArrayList;
import java.util.LinkedHashSet;
public class MainClass
{
    public static void main(String[] args)
    {
        //Constructing An ArrayList
ArrayList<String> listWithDuplicateElements = new ArrayList<String>();
listWithDuplicateElements.add("JAVA");
listWithDuplicateElements.add("J2EE");
listWithDuplicateElements.add("JSP");
listWithDuplicateElements.add("SERVLETS");
listWithDuplicateElements.add("JAVA");
listWithDuplicateElements.add("STRUTS");
listWithDuplicateElements.add("JSP");
 
LinkedHashSet<String> set = new LinkedHashSet<String>(listWithDuplicateElements);
 
ArrayList<String> listWithoutDuplicateElements = new ArrayList<String>(set);
 
System.out.print("ArrayList After Removing Duplicate Elements :");
System.out.println(listWithoutDuplicateElements);
    }
}