Single responsibility principle

Principle of single responsibility

Definition

Principle of single responsibility （SRP）, In terms of a class , There should be only one cause for it to change .

Simply speaking , Let a class do only part of the work , This reduces the coupling , Improve reusability , Improve readability , Reduce the risk caused by changes .

【 Common code 】

package pers.keafmd.accumulate.designmode.singleresponsibility;

/** * Keafmd * * @ClassName: FreshmenSelected * @Description:  New students  * @author:  Cowherd Conan  * @date: 2022-06-27 19:39 */
public class FreshmenSelected {
    

    public void distributeBooks(){
    
        System.out.println(" Distribute books ...");
    }

    public void allocateDormitory(){
    
        System.out.println(" Assign dormitories ...");
    }

    public static void main(String[] args) {
    
        System.out.println(" Start arranging for new students ：");
        FreshmenSelected freshmenSelected = new FreshmenSelected();
        freshmenSelected.distributeBooks();
        freshmenSelected.allocateDormitory();
        System.out.println(" end-of-job ！");

    }
}

effect ：

 Start arranging for new students ：
 Distribute books ...
 Assign dormitories ...
 end-of-job ！

Process finished with exit code 0

【 Principle of single responsibility 】

StudyMembers

package pers.keafmd.accumulate.designmode.singleresponsibility;

/** * Keafmd * * @ClassName: StudyMembers * @Description:  Study commissar  * @author:  Cowherd Conan  * @date: 2022-06-27 19:46 */
public class StudyMembers {
    

    public void distributeBooks(){
    
        System.out.println(" The study committee is responsible for ： Distribute books ...");
    }

}

LifeCommittee

package pers.keafmd.accumulate.designmode.singleresponsibility;

/** * Keafmd * * @ClassName: LifeCommittee * @Description:  Life Commissioner  * @author:  Cowherd Conan  * @date: 2022-06-27 19:47 */
public class LifeCommittee {
    

    public void allocateDormitory(){
    
        System.out.println(" The life committee is responsible for ： Assign dormitories ...");
    }

}

ClassMonitor

package pers.keafmd.accumulate.designmode.singleresponsibility;

/** * Keafmd * * @ClassName: ClassMonitor * @Description:  Monitor of the class  * @author:  Cowherd Conan  * @date: 2022-06-27 19:46 */
public class ClassMonitor {
    
    private StudyMembers studyMembers;
    private LifeCommittee lifeCommittee;

    public ClassMonitor() {
    
        studyMembers = new StudyMembers();
        lifeCommittee = new LifeCommittee();
    }

    public void assignWork(){
    
        System.out.println(" The monitor began to assign jobs to different class cadres , Work together to complete the enrollment of new students ：");
        studyMembers.distributeBooks();
        lifeCommittee.allocateDormitory();
        System.out.println(" end-of-job ！");
    }

    public static void main(String[] args) {
    
        System.out.println(" Start arranging for new students ：");
        ClassMonitor classMonitor = new ClassMonitor();
        classMonitor.assignWork();
    }
}

effect ：

 Start arranging for new students ：
 The monitor began to assign jobs to different class cadres , Work together to complete the enrollment of new students ：
 The study committee is responsible for ： Distribute books ...
 The life committee is responsible for ： Assign dormitories ...
 end-of-job ！

Process finished with exit code 0

The above is the whole content of the principle of single responsibility

Copyright notice ：
Original Blogger ： Cowherd Conan
Blogger original link ：https://keafmd.blog.csdn.net/
Personal blog links ：https://www.keafmd.top/

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