构造方法construct

public class Student {
    
    
    String name;
    int age;
    
    
    
    public Student() {    
        System.out.println("student construct");
    }
    //通过构造方法初始化对象
    public Student(String _name,int _age) {    
        name=_name;
        age=_age;
        System.out.println(name);
        System.out.println(age);
    }
        
    }


public class Test3 {
    public static void main(String[] args) {
        Student s = new Student(); //student construct
        
        Student s1 = new Student("wang",80);//wang 80
        Student s2 = new Student("qiao",20);//qiao 20
        
        int age_sum=s1.age+s2.age;
        System.out.println(age_sum);//100
    }
    }