父类的私有变量和私有方法是否由Java的子类继承？
不，子类不能继承父类的私有成员，它只能继承其受保护的，默认的和公共的成员。如果尝试尝试，则会出现如下编译时错误：-
示例
class Super{
private int data = 30;
public void display(){
System.out.println("Hello this is the method of the super class");
}
}
public class Sub extends Super{
public void greet(){
System.out.println("Hello this is the method of the sub class");
}
public static void main(String args[]){
Sub obj = new Sub();
System.out.println(obj.data);
}
}在执行此示例时，它将给出一个编译时错误，如下所示：
Exception in thread "main" java.lang.Error: Unresolved compilation problem: The field Super.data is not visible at Sub.main(Sub.java:13)