Use the keyword java pravite

Package Penalty for java04;
 / * 
* Problem Description: When defining the age of Person, can not prevent unreasonable value set to come 
* Solution: Use the keyword will need to protect private member variables can be modified 
* 
* Once a private use has been modified, originally class which can still be freely accessible. 
* However, beyond the scope of this class will complement not directly access the 
* 
* Introduction to access private member variables, is the definition of a pair of children Getter / Setter method 
* 
* naming getXxx setXxx 
* 
* For getter, it can not have parameters, return value types and members corresponding to the type 
* for the setter, you can not have a return value, parameter types and the corresponding member variables 
* 
* * / 

public  class the Person { 
    String name; // name 
    Private  int Age; // Age
 //     Private Age = int 12; // Age 

    public  voidShow () { 
        System.out.println ( "My name:" + name + ", this year's" + age); 
    } 
    // This method members, set up specifically for the age data 
    public  void setAge ( int NUM) {
         IF (NUM <100 && NUM> 0 ) { 
            Age = NUM; 
        } the else { 
            System.out.println ( "data unreasonable" );}
 //         Age NUM =; 
    }
     // this method members. Age data acquiring dedicated 
    public  int getAge () {
         return age; 
    } 
}

Package java04; 

public  class DemoPerson {
     public  static  void main (String [] args) { 
        the Person Person = new new the Person (); 
        person.show (); 
        PERSON.NAME = "Bob" ;
 //         person.age = -20; Error written 
        person.setAge (10 ); 

        System.out.println ( "get Age" + person.getAge ()); // get the age of 10 
        person.show (); // my name: Xiao Ming, this year 10 

    } 
}

Use the keyword java pravite

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