java第八次作业
1、定义一个点类Point，包含2个成员变量x、y分别表示x和y坐标，2个构造器Point()和Point(intx0,y0),以及一个movePoint（intdx,intdy）方法实现点的位置移动，创建两个Point对象p1、p2，分别调用movePoint方法后，打印p1和p2的坐标。
package work1;
public class test1 {
public static void main(String[] args) {
// TODO Auto-generated method stub
point p1=new point(1,2);
p1.movePoint(2, 5);
System.out.println("p1移动后的坐标为"+p1.getX()+","+p1.getY());
point p2=new point(6,1);
p2.movePoint(2, 3);
System.out.println("p2移动后的坐标为"+p2.getX()+","+p2.getY());
}
}
package work1;
public class point {
private int x;
private int y;
public int getX() {
return x;
}
public void setX(int x) {
this.x = x;
}
public int getY() {
return y;
}
public void setY(int y) {
this.y = y;
}
public point() {
super();
}
public point(int x, int y) {
super();
this.x = x;
this.y = y;
}
public void movePoint(int dx,int dy) {
x+=dx;
y+=dy;
}
}
2.定义一个矩形类Rectangle：（知识点：对象的创建和使用）[必做题]
定义三个方法：getArea()求面积、getPer()求周长，showAll()分别在控制台输出长、宽、面积、周长。
有2个属性：长length、宽width
通过构造方法Rectangle(intwidth,intlength)，分别给两个属性赋值
创建一个Rectangle对象，并输出相关信息
package work2;
public class Rectangle {
private int length;
private int width;
public int getArea() {
int Area=length*width;
return Area;
}
public int getPer() {
int Per=(length+width)*2;
return Per;
}
public Rectangle(int length, int width) {
super();
this.length = length;
this.width = width;
}
public void showAll() {
System.out.println("长为"+length+"宽为"+width+"面积为"+getArea()+"周长为"+getPer());
}
}
package work2;
public class test2 {
public static void main(String[] args) {
// TODO Auto-generated method stub
Rectangle a=new Rectangle(3,2);
a.showAll();
}
}
3.定义一个笔记本类，该类有颜色（char）和cpu型号（int）两个属性。[必做题]
无参和有参的两个构造方法；有参构造方法可以在创建对象的同时为每个属性赋值；
输出笔记本信息的方法
然后编写一个测试类，测试笔记本类的各个方法。
package work3;
public class test3 {
public static void main(String[] args) {
// TODO Auto-generated method stub
computer a1=new computer();
a1.color='黑';
a1.setCpu(1);
a1.show();
computer a2=new computer('白',2);
a2.show();
}
}
package work3;
public class computer {
char color;
int cpu;
public char getColor() {
return color;
}
public void setColor(char color) {
this.color = color;
}
public int getCpu() {
return cpu;
}
public void setCpu(int cpu) {
this.cpu = cpu;
}
public computer() {
super();
}
public computer(char color, int cpu) {
super();
this.color = color;
this.cpu = cpu;
}
public void show() {
System.out.println("笔记本的颜色为"+getColor()+","+"型号为"+getCpu());
}
}
5.定义两个类，描述如下：[必做题]
1.定义一个人类Person：
(1)定义一个方法sayHello()，可以向对方发出问候语“hello,mynameisXXX”
(2)有三个属性：名字、身高、体重
2.定义一个PersonCreate类：
(1)创建两个对象，分别是zhangsan，33岁，1.73；lishi，44，1.74
(2)分别调用对象的sayHello()方法。
package work5;
public class Constructor {
public static void main(String[] args) {
// TODO Auto-generated method stub
person a1=new person("zhangsan",33,1.73);
a1.sayHello();
person a2=new person("lisi",44,1.74);
a2.sayHello();
}
}
package work5;
public class person {
private String names;
private int age;
private double height;
public String getNames() {
return names;
}
public void setNames(String names) {
this.names = names;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public double getHeight() {
return height;
}
public void setHeight(double height) {
this.height = height;
}
public person(String names, int age, double height) {
super();
this.names = names;
this.age = age;
this.height = height;
}
public void sayHello() {
System.out.println("hello,my name is"+" "+names);
System.out.println("年龄为"+age+"身高为"+height);
}
}
6.、定义两个类，描述如下：[必做题]
1.定义一个人类Person：
（1）定义一个方法sayHello()，可以向对方发出问候语“hello,mynameisXXX”
（2）有三个属性：名字、身高、体重
（3）通过构造方法，分别给三个属性赋值
2.定义一个Constructor类：
（1）创建两个对象，分别是zhangsan，33岁，1.73；lishi，44，1.74
（2）分别调用对象的sayHello()方法。
package work6;
public class Constructor {
public static void main(String[] args) {
// TODO Auto-generated method stub
person a1=new person("zhangsan",33,1.73);
a1.sayHello();
person a2=new person("lisi",44,1.74);
a2.sayHello();
}
}
package work6;
public class person {
private String names;
private int age;
private double height;
public String getNames() {
return names;
}
public void setNames(String names) {
this.names = names;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public double getHeight() {
return height;
}
public void setHeight(double height) {
this.height = height;
}
public person(String names, int age, double height) {
super();
this.names = names;
this.age = age;
this.height = height;
}
public void sayHello() {
System.out.println("hello,my name is"+" "+names);
System.out.println("年龄为"+age+"身高为"+height);
}
}
7..定义一个汽车类Vehicle，要求如下：[选做题]
1.属性包括：汽车品牌brand（String类型）、颜色color（String类型）和速度speed（double类型），并且所有属性为私有。
2.至少提供一个有参的构造方法（要求品牌和颜色可以初始化为任意值，但速度的初始值必须为0）。
3.为私有属性提供访问器方法。注意：汽车品牌一旦初始化之后不能修改。
4.定义一个一般方法run()，用打印语句描述汽车奔跑
的功能
5.定义测试类VehicleTest，在其main方法中创建一个品牌为“benz”、颜色为“black”的汽车。
package work7;
public class Vehicle {
private String band;
private String color;
private double speed;
public String getBand() {
return band;
}
public String getColor() {
return color;
}
public double getSpeed() {
return speed;
}
public Vehicle(String band, String color, double speed) {
super();
this.band = band;
this.color = color;
this.speed = 0;
}
public void run() {
System.out.println(color+"色"+band+"品牌的汽车"+"以"+speed+"的速度在行驶");
}
}
package work7;
public class VehicleTest {
public static void main(String[] args) {
// TODO Auto-generated method stub
Vehicle a=new Vehicle("benz","black",5);
a.run();
}
}
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