java arraylist 对象 删除_ArrayList实现删除重复元素（元素不是对象类型的情况）...

package 集合;

import java.util.ArrayList;

import java.util.Iterator;

/*

* 去除ArrayList里面的重复元素

*

* */

public class ArrayListTest1 {

public static void main(String[] args) {

ArrayList al = new ArrayList();

al.add("java1");

al.add("java2");

al.add("java1");

al.add("java2");

al.add("java1");

al.add("java3");

sop(al);

al = noReplaceElement(al);

sop(al);

}

public static void sop(Object obj){

System.out.print(obj);

}

public static ArrayList noReplaceElement(ArrayList al){//不重复的元素

ArrayList newAl = new ArrayList();

Iterator it = al.iterator();

while(it.hasNext()){

Object obj = it.next();

if(!newAl.contains(obj)){

newAl.add(obj);

}

}

return newAl;

}

}