如果现在父类的一个方法定义成private访问权限，在子类中将此方
法声明为default访问权限，那么这样还叫重写吗？

NO

package top.qaqaq.java.P274;

/*
	定义一个ManKind类，包括
	成员变量int sex和int salary；
	方法void manOrWoman()：根据sex的值显示“man”(sex==1)或者“woman”(sex==0)；
	方法void employeed()：根据salary的值显示“no job”(salary==0)或者“ job”(salary!=0)。
 * 
 * 
 */
public class ManKind {

	private int sex;// 性别
	private int salary;// 薪资

	public ManKind() {
	}

	public ManKind(int sex, int salary) {
		this.sex = sex;
		this.salary = salary;
	}

	public void manOrWoman() {
		if (sex == 1) {
			System.out.println("man");
		} else if (sex == 0) {
			System.out.println("woman");
		}
	}

	public void employeed() {
//		if(salary == 0) {
//			System.out.println("no job");
//		}else {
//			System.out.println("job");
//		}
		// 或
		String jobInfo = (salary == 0) ? "no job" : "job";
		System.out.println(jobInfo);
	}

	public int getSex() {
		return sex;
	}

	public void setSex(int sex) {
		this.sex = sex;
	}

	public int getSalary() {
		return salary;
	}

	public void setSalary(int salary) {
		this.salary = salary;
	}

}

package top.qaqaq.java.P274;

/*
	定义类Kids继承ManKind，并包括
	成员变量int yearsOld；
	方法printAge()打印yearsOld的值。
 * 
 * 
 */
public class Kids extends ManKind {

	private int yearsOld;

	public Kids() {
	}

	public Kids(int yearsOld) {
		this.yearsOld = yearsOld;
	}

	public void printAge() {
		System.out.println("I am " + yearsOld + " years old.");
	}

	public int getYearsOld() {
		return yearsOld;
	}

	public void setYearsOld(int yearsOld) {
		this.yearsOld = yearsOld;
	}
	
	/*
	 * 修改练习1.2中定义的类Kids，在Kids中重新定义employeed()方法，
	 * 覆盖父类ManKind中定义的employeed()方法，
	 * 输出“Kids should study and no job.”
	 * 
	 */
	
	public void employeed() {
		System.out.println("Kids should study and no job.");
	}
}

package top.qaqaq.java.P274;
/*
 * 定义类KidsTest，在类的main方法中实例化Kids的对象someKid，用该对象访问其父类的成员变量及方法。
 * 
 * 
 */
public class KidsTest {
	public static void main(String[] args) {
		
		Kids someKid = new Kids(12);
		
		someKid.printAge();
		
		someKid.setSalary(0);
		someKid.setSex(1);
		
		someKid.employeed();
		someKid.manOrWoman();

	}

}

package top.qaqaq.java.P274;

public class Circle {

	private double radius;// 半径

	public Circle() {
		radius = 1.0;
	}

	public double getRadius() {
		return radius;
	}

	public void setRadius(double radius) {
		this.radius = radius;
	}

	//返回圆的面积
	public double findArea() {
		return Math.PI * radius * radius;
	}

}

package top.qaqaq.java.P274;

public class Cylinder extends Circle {

	private double length;// 高

	public Cylinder() {
		length = 1.0;
	}

	public double getLength() {
		return length;
	}

	public void setLength(double length) {
		this.length = length;
	}

	//返回圆柱的体积
	public double findVolume() {
		return Math.PI * getRadius() * getRadius() * getLength();
//		return findArea() * getLength();
	}
	
	@Override
	public double findArea() {//返回圆柱的表面积
		return Math.PI * getRadius() * getRadius() * 2 + 
				2 * Math.PI * getRadius() * getLength();
	}

}

package top.qaqaq.java.P274;

public class CylinderTest {

	public static void main(String[] args) {
		
		Cylinder cy = new Cylinder();
		
		cy.setRadius(2.1);
		cy.setLength(3.4);
		double volume = cy.findVolume();
		System.out.println("圆柱的体积为：" + volume);
		
		//没有重写findArea()时;
//		double area = cy.findArea();
//		System.out.println("底面圆的面积：" + area);
		//重写findArea()以后
		double area = cy.findArea();
		System.out.println("圆柱的表面积：" + area);
	}
}