ArrayList 的删除重复元素以及删除

[align=left]package 集合;[/align]

[align=left]import java.util.ArrayList;[/align]
[align=left]import java.util.Iterator;[/align]
[align=left]import java.util.LinkedList;[/align]

[align=left]/*将自定义对象作为元素，存到ArrayList集合中，并去除重复元素*/[/align]
[align=left]public class ArrayListTest2[/align]
[align=left]{[/align]
public static void main(String[]
args)
[align=left] {[/align]
[align=left] ArrayList al = new ArrayList();[/align]
al.add(new Person("List01",
30));
al.add(new Person("List02",
31));
al.add(new Person("List03",
32));
al.add(new Person("List04",
33));
[align=left] [/align]
al.add(new Person("List04",
33));
al.add(new Person("List04",
33));
[align=left] [/align]
[align=left] al = singleElement(al);[/align]
System.out.println("remove"+al.remove(new Person("List01",
30)));
[align=left] [/align]
[align=left] Iterator it = al.iterator();[/align]
[align=left] while(it.hasNext())[/align]
[align=left] {[/align]
[align=left] Person p = (Person) it.next();[/align]
[align=left] System.out.println(p.getName()+"::"+p.getAge());[/align]
[align=left] }[/align]
[align=left] }[/align]
[align=left] public static ArrayList singleElement(ArrayList al)[/align]
[align=left] {[/align]
[align=left] //定义一个临时容器[/align]
[align=left] ArrayList newAL = new ArrayList();[/align]
[align=left] Iterator it = al.iterator();[/align]
[align=left] while(it.hasNext())[/align]
[align=left] {[/align]
[align=left] Object obj = it.next();[/align]
if(!newAL.contains(obj)
)
[align=left] newAL.add(obj);[/align]
[align=left] }[/align]
[align=left] return newAL;[/align]
[align=left] }[/align]
[align=left]}[/align]
[align=left]class Person[/align]
[align=left]{[/align]
[align=left] private String name;[/align]
[align=left] private int age;[/align]
[align=left] Person(String name,int age)[/align]
[align=left] {[/align]
this.name =
name;
this.age =
age;
[align=left] }[/align]
public String
getName()
[align=left] {[/align]
[align=left] return name;[/align]
[align=left] }[/align]
[align=left] public int getAge()[/align]
[align=left] {[/align]
[align=left] return age;[/align]
[align=left] }[/align]
public boolean equals(Object
obj)
[align=left] {[/align]
[align=left] if(!(obj instanceof Person))[/align]
[align=left] return false;[/align]
[align=left] Person p = (Person)obj;[/align]
return this.name.equals(p.name)&&this.age ==
p.age;
[align=left] }[/align]
[align=left]}[/align]

[align=left]removetrue[/align]
[align=left]List02::31[/align]
[align=left]List03::32[/align]
[align=left]List04::33[/align]