public、private、protected修饰的方法

GitHub: https://github.com/lgsdaredevil/keyWords.git

public：公共的，外部可见方法

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public void publicTest(){
        System.out.print("this is public method!\n");
    }

private：私有的，外部不可见，只能本类调用的方法

private void privateTest(){
        System.out.print("this is private method!\n");
    }
 
    public void getPrivate(){
        this.privateTest();
    }

protected：被保护的方法，存在继承关系，父类方法被保护，父类可以自己调用，子类也可以调用父类的protected方法，非继承关系不可见

Father类：

protected void protectedTest(){
        System.out.print("this is father's protected method!\n");
    }
 
    private void privateFather(){
        System.out.print("this is father's private method!\n");
    }
 
    public void fatherTest(){
        this.privateFather();
        this.protectedTest();
    }

Child类：

public void childTest(){
        System.out.print("this is child's method\n");
        super.protectedTest();
    }

main方法：

public static void main(String[] args){
        JavaPublic javaPublic = new JavaPublic();
        javaPublic.publicTest();
        JavaPrivate javaPrivate = new JavaPrivate();
        javaPrivate.getPrivate();
        Child child = new Child();
        child.childTest();
        // 父类对象引用子类不可以调用父类的protected方法
        Father father = new Child();
        father.fatherTest();
    }