java编程语言java

Question

1创建 Student 类；( id , name , age )·2创建 Test 类，
使用 ArrayList < Student > al = new ArrayList ()；来存储多个对象·并进行输出。
·3尝试将学生的对象写入字符流文件t1.txt

Answer 1

public class Studs {
     private String no;
    private String name;
    private int  age;

    public String getNo() {
        return no;
    }

    public void setNo(String no) {
        this.no = no;
    }

    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  Studs(String no,String name ,int age){
        this.no=no;
        this.name=name;
        this.age=age;
    }

    @Override
    public String toString() {
        return "Student [no=" + no + ", name=" + name + ", age=" + age + "]";
    }

    public static void main(String[] args) {
        ArrayList< Studs > al = new ArrayList ();
        Studs studs1=new Studs("001","张三",18);
        Studs studs2=new Studs("002","李四",18);
        Studs studs3=new Studs("003","王五",18);
        al.add(studs1);
        al.add(studs2);
        al.add(studs3);
        String fileRequestPar ="d:/test";
        try {
            FileWriter fwRequst = new FileWriter(fileRequestPar + "/" +
                    "t1.txt", true);
            String requestTxt =al.toString() ;
            fwRequst.write(requestTxt);

            fwRequst.close();
         } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }



  }