2021-04-21 课堂记录--类的封装

1

package edu.xcdq;


import org.apache.log4j.Logger;


public class Demo01 {
    public static int add( int a , int b ) {
        return a + b;
    }

    public static void main(String[] args) {
        Logger logger = Logger.getLogger(Demo01.class);
       logger.info("wertfewrfwe");
        System.out.println(1+1);
        System.out.println(1+2);
        System.out.println(1+3);
        System.out.println(1+4);
        System.out.println(1+5);

        System.out.println(add(1,1));
        System.out.println(add(1,2));
        System.out.println(add(1,3));
        System.out.println(add(1,4));
        System.out.println(add(1,5));


    }

}

2

package edu.xcdq;


public class Demo02 {
    private String name;
    private int age;

    public void setName( String name) {
        this.name = name;
    }
    public String getName() {
        return this.name;
    }


}

3

package edu.xcdq;


public class Demo03 {
    public String name;
    public int age;

    public void setName( String name) {
        this.name = name;
    }
    public String getName() {
        return this.name;
    }


}

4,testDemo02

package edu.xcdq;


public class testDemo02 {
    public static void main(String[] args) {
        Demo02 demo02 = new Demo02();
        demo02.setName("小明");
        System.out.println(demo02.getName());


    }
}

5,testDemo03

package edu.xcdq;


public class testDemo03  {
    public static void main(String[] args) {
        Demo03 demo03 = new Demo03();
        demo03.setName("小明");
        System.out.println(demo03.getName());

    }
}