请求大神们出个例子什么的我参考一下，大一小白，啥也不会

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public class Test{
    Test(Integer i){System.out.println(i);};
    public static void main(String src[]){
        Test test = new Test(1);
    }
}


package zy;

public class Test3 {
    
    public static void main(String[] args) {

        Person person = new Person(1, "liuze");

        System.out.println(person.getId());
        System.out.println(person.getName());
        System.out.println(person);

    }
}


class Person{

    private int id;
    private String name;

    // 有参的构造方法
    public Person(int id,String name){
        this.id=id;
        this.name=name;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

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

    @Override
    public String toString() {
        return "Person{" +
                "id=" + id +
                ", name='" + name + '\'' +
                '}';
    }
}

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