public class ArrayListDemo02 {
public static void main(String[] args) {
//創(chuàng)建集合
ArrayList<String> array = new ArrayList<String>();

//添加元素
array.add("hello");
array.add("51CTO");
array.add("一計(jì)之長");

//public boolean remove(Object o)：刪除指定的元素，返回刪除是否成功
// System.out.println(array.remove("world"));
// System.out.println(array.remove("javaee"));

//public E remove(int index)：刪除指定索引處的元素，返回被刪除的元素
// System.out.println(array.remove(1));

//IndexOutOfBoundsException
// System.out.println(array.remove(3));

//public E set(int index,E element)：修改指定索引處的元素，返回被修改的元素
// System.out.println(array.set(1,"javaee"));

//IndexOutOfBoundsException
// System.out.println(array.set(3,"javaee"));

//public E get(int index)：返回指定索引處的元素
// System.out.println(array.get(0));
// System.out.println(array.get(1));
// System.out.println(array.get(2));
//System.out.println(array.get(3));

//public int size()：返回集合中的元素的個(gè)數(shù)
System.out.println(array.size());

//輸出集合
System.out.println("array:" + array);
}
}

public class ArrayListTest01 {
public static void main(String[] args) {
//創(chuàng)建集合對(duì)象
ArrayList<String> array = new ArrayList<String>();

//往集合中添加字符串對(duì)象
array.add("一計(jì)之長");
array.add("左冷禪");
array.add("風(fēng)清揚(yáng)");

//遍歷集合，其次要能夠獲取到集合的長度，這個(gè)通過size()方法實(shí)現(xiàn)
// System.out.println(array.size());

//遍歷集合的通用格式
for(int i=0; i<array.size(); i++) {
String s = array.get(i);
System.out.println(s);
}
}
}

/*
學(xué)生類
*/
public class Student {
private String name;
private int age;

public Student() {}

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

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

public String getName() {
return name;
}

public void setAge(int age) {
this.age = age;
}

public int getAge() {
return age;
}
}

接著給出該需求相應(yīng)的實(shí)現(xiàn)代碼：

public class ArrayListTest02 {
public static void main(String[] args) {
//創(chuàng)建集合對(duì)象
ArrayList<Student> array = new ArrayList<>();

//創(chuàng)建學(xué)生對(duì)象
Student s1 = new Student("一計(jì)之長", 5);
Student s2 = new Student("51CTO", 12);
Student s3 = new Student("stefan", 26);

//添加學(xué)生對(duì)象到集合中
array.add(s1);
array.add(s2);
array.add(s3);

//遍歷集合，采用通用遍歷格式實(shí)現(xiàn)
for (int i = 0; i < array.size(); i++) {
Student s = array.get(i);
System.out.println(s.getName() + "," + s.getAge());
}
}
}

public class ArrayListTest {
public static void main(String[] args) {
//創(chuàng)建集合對(duì)象
ArrayList<Student> array = new ArrayList<Student>();

//為了提高代碼的復(fù)用性，我們用方法來改進(jìn)程序
addStudent(array);
addStudent(array);
addStudent(array);

//遍歷集合，采用通用遍歷格式實(shí)現(xiàn)
for (int i = 0; i < array.size(); i++) {
Student s = array.get(i);
System.out.println(s.getName() + "," + s.getAge());
}
}

/*
兩個(gè)明確：
返回值類型：void
參數(shù)：ArrayList<Student> array
*/
public static void addStudent(ArrayList<Student> array) {
//鍵盤錄入學(xué)生對(duì)象所需要的數(shù)據(jù)
Scanner sc = new Scanner(System.in);

System.out.println("請(qǐng)輸入學(xué)生姓名:");
String name = sc.nextLine();

System.out.println("請(qǐng)輸入學(xué)生年齡:");
String age = sc.nextLine();

//創(chuàng)建學(xué)生對(duì)象，把鍵盤錄入的數(shù)據(jù)賦值給學(xué)生對(duì)象的成員變量
Student s = new Student();
s.setName(name);
s.setAge(age);

//往集合中添加學(xué)生對(duì)象
array.add(s);
}
}