ArrayList练习-去掉重复元素

学习阶段，以下不考虑泛型

package collectionDemo;

import java.util.*;
/*
 * ArrayList去掉重复元素练习
 * 实现思路：新申请一个集合，每次取一个，判断有没有在新集合中，没有则存储进去，有则什么都不做
 * 
 * 输出结果：
 * [name:李四  age:5, name:赵三  age:8, name:科比  age:13]
 * --------------------------------------------------
 * [name:李四  age:5, name:赵三  age:8, name:科比  age:13]
 * 
*/
public class ArrayListDemo {

    public static void main(String[] args) {
        
        List<Student> list = new ArrayList<Student>();
        
        list.add(new Student("李四",5));
        list.add(new Student("赵三",8));
        list.add(new Student("科比",13));
        list.add(new Student("李四",5));
        list.add(new Student("赵三",8));
        list.add(new Student("科比",13));
        
        //迭代器实现
        List<Student> list2 = new ArrayList<Student>();
        
        Iterator<Student> it =  list.iterator();
        
        Student temp = null;
        while(it.hasNext()){
            temp = (Student)it.next();
            if(!list2.contains(temp)){
                list2.add(temp);
            }
        }
        
        System.out.println(list2);
        System.out.println("--------------------------------------------------");
        
        //不使用迭代器实现
        List<Student> list3 = new ArrayList<Student>();
        
        for(int i= 0; i<list.size(); i++){
            temp = (Student)list.get(i);
            if(!list3.contains(temp)){
                list3.add(temp);
            }
        }
        
        System.out.println(list3);
    }

    
}

class Student{
    private String name;
    private int age;
    
    Student(){
        
    }
    
    
    Student(String name, int age){
        this.name = name;
        this.age = age;
    }


    public String getName() {
        return name;
    }


    public void setName(String name) {
        this.name = name;
    }


    public int getAge() {
        return age;
    }


    public void setAge(int age) {
        this.age = age;
    }
    
    public String toString(){
        
        return "name:"+this.name+"  age:"+this.age;
    }
    
    public boolean equals(Object o){
        
        if(o == null){
            return false;
        }
        if(this == o){
            return true;
        }
        if(o instanceof Student){
            Student s = (Student)o;
            return this.name.equals(s.name) && this.age == s.age;
        }
        return false;
    }

}