Java study notes, learning notes

Java study notes, learning notes
Class and object (concept Demo)

Object-Oriented java C ++ encapsulate inherited multi-state object

Process-oriented C struct


1. Get user input 2. logical judgment 3. Calculation output result


Process-oriented C struct content: pointer struct header file


Class is the basis of Object-Oriented Programming Language


Class? As long as a human computer is a group of common things (with common characteristics and actions ),


Set/template


The description describes the entire class. (Describing common actions and features is not responsible for the implementation of specific definitions)


The object constructs a specific reference from the set/template (assign values/describe some specific values or operations)


Call through an object (static)


Association


Private
Public is recommended.


Job:


// The Back-to-contract mode of the primary key game


// Each round of Dema and ice are attacked by each other. Dema is attacked by ice, and Dema is attacked by ice.


// Keep hitting a side with a blood volume lower than 0!


Summary:
Class description: several classes. One execution class.


Description class property Method


Execution class: main function call Code Business Process Control


It is a bridge between functions and the outside world.

Next course constructor this

// Demand analysis: the status of the XX car on the road shows the forward and backward parking


// Draw distance from the road status of a car with a noun brand according to your needs


// 1. Which nouns can be classified into one category until they cannot be classified. 2. Which nouns belong to which terms?


// Automobile: brand model status Road: nouns are either Class, attribute, or redundant


// The method (function) where the verb moves forward and backward)




// Car: Parking after driving




// Create a class: Car class


// Market research-Demand Analysis-Outline Design-detailed design-code writing-test-Demo-> launch


// Automotive: brand model Status


// Only the attribute method can be directly written in the code segment of the class.


Public class Car {


// Attribute (a global variable) the attribute name should be meaningful as much as possible
// Attribute is the term used to describe the feature.


String brand; // The naming rules of brand attributes are the same as those of variables in lower case.
String model; // model qualifier data type attribute name (analyzed)
String statu;


Int length; // mileage
//************************************** *********************


// The method is the verb that describes the action.


// * Qualifier * return value type method name (parameter list) {code segment}


Public void drive (){

// Length ++;


System. out. print (brand + "brand" + model + "model:" + statu + "status! ");
}


Public void ahead (){


Length ++;
 
System. out. print (brand + "brand" + model + "model:" + statu + "status! ");


}


Public void back (){


Length --;


System. out. print (brand + "brand" + model + "model:" + statu + "status! ");


}


Public void stop (){


System. out. print (brand + "brand" + model + "model:" + statu + "status! ");


}


}

/* Assignments of selecting shanzhi education 2nd
* Class and Object
* Dema Implementation of the cold ice and Dema Combat Games
* Instructor Bear
* Student Cao Kun
* 2015-6-6
*/


/* Requirement Analysis


* Dema vs ice vs. the cold ice


* Each round of Dema and ice are attacked by each other. Dema is attacked by ice, and Dema is attacked by ice.


* Keep hitting a side with a blood volume lower than 0!
 
*/


Public class Dema {


// Define the attributes and methods of the class
Private String dname;
Private int dblood; // life value
Private int dattackpower; // damage caused by an attack to the other party's life




Public void setDName (String dname ){

This. dname = dname;

}


Public String getDName (){

Return this. dname;


}


Public void setDBlood (int dblood ){

This. dblood = dblood;

}


Public int getDBlood (){

Return this. dblood;


}


Public void setDAttackpower (int dattackpower ){

This. dattackpower = dattackpower;


}


Public int getDAttackpower (){

Return this. dattackpower;


}


Public void DAttack (Hanbing hanbing ){
 
Hanbing. setHBlood (hanbing. getHBlood ()-this. getDAttackpower ());

// System. out. println ("name:" + this. getDName () + "named" + hangbing. getHName () + "an attack by a cold ice warrior, resulting in a cold ice warrior" + hanbing. getHName () + "Lost Life Value:" + this. getDAttackpower () + ", Ice Warrior:" + dema. getHName () + "remaining lifecycle values:" + hbpower );

}


}

/* Assignments of selecting shanzhi education 2nd
* Class and Object
* Hanbing Implementation of the Combat Games between ice and Dema
* Instructor Bear
* Student Cao Kun
* 2015-6-6
*/


/* Requirement Analysis


* Dema vs ice vs. the cold ice


* Each round of Dema and ice are attacked by each other. Dema is attacked by ice, and Dema is attacked by ice.


* Keep hitting a side with a blood volume lower than 0!
 
*/


Public class Hanbing {


// Define the attributes and methods of the class
Private String hname;
Private int hblood; // life value
Private int hattackpower; // damage caused by an attack to the other party's life




Public void setHName (String hname ){

This. hname = hname;

}


Public String getHName (){

Return this. hname;


}


Public void setHBlood (int hblood ){

This. hblood = hblood;

}


Public int getHBlood (){

Return this. hblood;

}


Public void setHAttackpower (int hattackpower ){

This. hattackpower = hattackpower;


}


Public int getHAttackpower (){

Return this. hattackpower;


}


Public void HAttack (Dema dema ){
 
Dema. setDBlood (dema. getDBlood ()-this. getHAttackpower ());

// System. out. println ("name:" + this. the cold ice warrior of getHName () + "is named" + dema. getDName () + "an attack by a attach of the dema warrior, resulting in the" + dema. getDName () + "Lost Life Value:" + this. getHAttackpower () + ", dema Warrior:" + dema. getDName () + "remaining lifecycle values:" + demapower );


}


}

/* Assignments of selecting shanzhi education 2nd
* Class and Object
* Implementation of the combat game execution class of cold ice and Dema
* Instructor Bear
* Student Cao Kun
* 2015-6-6
*/


/* Requirement Analysis


* Dema vs ice vs. the cold ice


* Each round of Dema and ice are attacked by each other. Dema is attacked by ice, and Dema is attacked by ice.


* Keep hitting a side with a blood volume lower than 0!
 
*/


Public class Manager {


Public static void main (String args []) {


Hanbing hb = new Hanbing ();
Dema dm = new Dema ();

Hb. setHName ("James ");
Hb. setHBlood (1000 );
Hb. setHAttackpower (95 );


Dm. setDName ("Li Si ");
Dm. setDBlood (900 );
Dm. setDAttackpower (108 );


While (true ){


Hb. HAttack (dm );


System. out. println ("Ice Warrior:" + hb. getHName () + "to the defma Warrior:" + dm. getDName () + "an attack, resulting in the" + dm. getDName () + "loss lifecycle:" + hb. getHAttackpower () + ", Dema Warrior:" + dm. getDName () + "remaining lifecycle:" + dm. getDBlood ());

If (hb. getHBlood () <= 0 | dm. getDBlood () <= 0)

Break;


Dm. DAttack (hb );

System. out. println ("Dema Warrior:" + dm. getDName () + "give ice fighters:" + hb. getHName () + "an attack that causes ice fighters:" + hb. getHName () + "loss lifecycle:" + dm. getDAttackpower () + ", Ice Warrior:" + hb. getHName () + "remaining lifecycle:" + hb. getHBlood ());

If (hb. getHBlood () <= 0 | dm. getDBlood () <= 0)

Break;
}


If (hb. getHBlood () <= 0 ){

System. out. println ("Dema Warrior:" + dm. getDName () + "Victory! ");


} Else {

System. out. println ("Ice Warrior:" + hb. getHName () + "Victory! ");
}





}
}