package com.loaderman.list;import java.util.ArrayList;import com.loaderman.bean.Person;public class Demo_ArrayListArrayList {	/**	 * * A:案例演示	 * 集合嵌套之ArrayList嵌套ArrayList	 * 案例:	 * 我们学科,学科又分为若个班级	 * 整个学科一个大集合	 * 若干个班级分为每一个小集合	 */	public static void main(String[] args) {		ArrayList
     
      
       > list = new ArrayList<>();				ArrayList
       
         first = new ArrayList<>();				//创建第一个班级		first.add(new Person("杨幂", 30));		first.add(new Person("李冰冰", 33));		first.add(new Person("范冰冰", 20));				ArrayList
        
          second = new ArrayList<>();		second.add(new Person("黄晓明", 31));		second.add(new Person("赵薇", 33));		second.add(new Person("陈坤", 32));				//将班级添加到学科集合中		list.add(first);		list.add(second);				//遍历学科集合		for(ArrayList
         
           a : list) {			for(Person p : a) {				System.out.println(p);			}		}	}}
         
        
       
      
     

 

package com.loaderman.bean;public class Person {	private String name;	private int age;	public Person() {		super();			}	public Person(String name, int age) {		super();		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;	}	@Override	public String toString() {		return "Person [name=" + name + ", age=" + age + "]";	}	/*@Override	public boolean equals(Object obj) {		Person p = (Person)obj;		return this.name.equals(p.name) && this.age == p.age;	}*/	}