Java debug模式怎么我最后出现的是这样的。

package _6day;

class _Student {

public static void main(String[] args) {


class Student {
    int age = 10;
    String name = "张三";
    double a = 100;

    public Student(int age) {
        System.out.println("Student age");
        this.age = age;
    }

    public Student() {
    }

    public Student(int age, String name) {
        this(age);
        System.out.println("Student age,name");
        this.name = name;
    }
}

}}

写在main方法里的只是定义了Student类对象，并没有代码初始创建Student对象，所以构造方法不会被调用。
举例：

```java
public class _Student {
    public static void main(String[] args) {
        Student student = new Student(18, "张三");
    }
}

class Student {
    int age = 10;
    String name = "张三";
    double a = 100;

    public Student(int age) {
        System.out.println("Student age");
        this.age = age;
    }

    public Student() {
    }

    public Student(int age, String name) {
        this(age);
        System.out.println("Student age,name");
        this.name = name;
    }
}

```

执行完了呗