Java 權限修飾詞

Java 權限修飾詞： private、default、protected、public

package demo;

public class Foo {
    private int result = 20;
    protected int getResult(){
        return result;
    }
}

package test;

import demo.Foo;

public class Bar extends Foo{
    private int sum = 10;
    public void reportSum(){
        sum += getResult();
        System.out.println("Sum :" + sum );
    }
}

public class Demo {
    public static void main(String[] args){
    
        Bar abc = new Bar();
        abc.reportSum();
    } 
}