Final review (Day5)

  Today is the fourth day of final review 5 God , I thought about taking my computer and staying in the library from two o'clock in the afternoon to ten o'clock in the evening three days ago , Have the ability to spend all day in the Library . little does one think , Reviewed these days , I'm tired of , It seems that the energy can't keep up . Is it like 《 flow 》 As mentioned in , If you try too hard, you won't last long , Only the right passion and investment can make what you do more lasting . In many courses , The biggest challenge is 《 Digital circuit and logic design 》《 Automatic control principle 》, Now we can only face difficulties , Don't think about the difficulty of this course when reviewing , Don't understand the topic by dividing the knowledge points , Then each one breaks . Take care of your energy first , Continue to review tomorrow ！

review ：《 Big talk data structure 》 About the definition of tree , Storage structure .163 page     then ,《 Artificial intelligence 》 The part about knowledge representation , It took some time to figure out a multiple-choice question in the math and electronics class , I didn't understand the answer to an analysis question , Design questions cannot be designed .

English ： Break 15 Minutes “the four clever brothers” , Only now do I realize the break 15 Minutes have never been used well , This is a fixed period of time , A fixed place , You can do something fixed , Whether reviewing , Still remember some words , Or read an English article .《 Everyone can use English 》 About an immersive learning , Fixed time , A fixed place , Do fixed things . I wanted to get up early and go to Xiaohu to read English , But you can't do it at a fixed time , morning 6:50 Get out of bed , As a result, even nucleic acid was not made , I don't know where the time is spent .

motion ： Go to GOGO Skateboard shop 1h Skate , Then hurry back to get Erya elective

bundle  n speed    skilful adj Expert     space v Separate         carry off Take away     make up  n make up

public class Student {
    private  String name;
    private int age;
    public Student(){

    }
    public Student(String name){
        this.name=name;
    }
    public Student(int age){
        this.age=age;
    }
    public Student (String name,int age)
    {
        this.name=name;
        this.age=age;
    }


    public void show(){
        System.out.println(name+","+age);
    }

}

public class StudentDemo {
    public static void main(String[] args) {
        Student s1=new Student();
        s1.show();
        Student s2=new Student(" Brigitte Lin ");
        s2.show();
        Student s3=new Student(30);
        s3.show();
        Student s4=new Student(" Brigitte Lin ",30);
        s4.show();
    }
}

summary ： The creation of construction methods

1. If no constructor is defined , The system will give a default parameterless construction method .
2. If the construction method is defined , The system will no longer provide the default construction method .

Overload of construction method

• If you customize the construction method with parameters , Also use the parameterless construction method , You have to write another parameterless constructor

Recommended use

Whether or not to use , All write parameterless construction methods .