使属性可读/可写，但不可重写/可重新声明

Question

是否可以防止子类覆盖/重新声明类属性，但仍允许它们读取和写入它？

class Human
{
    public boolean isMale;
    ...
}
class Asian extends Human
{
    public void livingLife()
    {
         // this is OK
         (isMale) ? doSomething() : doSomethingElse();
         // this is OK
         isMale = false;
    }
    // redeclaration is not OK
    public boolean isMale;
}

Answer 1

将其设为私有并提供访问器。

class Human
{
    private boolean isMale;
    public boolean isMale() {
        return isMale;
    }
    public void setIsMale(boolean isMale) {
        this.isMale = isMale;
    }
}

请注意，您无法避免重新声明。