为什么Student8方法里面的形参可有可无，我都能正常输出

Question

public class ExerTest3{
    public static void main(String[] args) {
        Student8[] test = new Student8[20];
         for(int i = 0;i < test.length;i++) {
             test[i] = new Student8();
             test[i].number = i+1;
             test[i].state = (int)(Math.random()*6+1);
             test[i].score = (int)(Math.random()*101+1);
             test[i].info(test);
         }
        
    }
} 
class Student8 {
    int number,state,score;
    
    public void info(Student8[] test ) {
        System.out.println("学生学号:" + number + "  学生年级:" + state
                + " 学生成绩： " + score);
    }
    
}

Answer 1