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]
1 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;
2 输出笔记本信息的方法
3 然后编写一个测试类,测试笔记本类的各个方法。
package demo8_1eighthweek_Thursday; public class computer { char color; int cpu; public void com() { System.out.println("颜色为" + color); System.out.println("cpu型号为" + cpu); } }
package demo8_1eighthweek_Thursday; public class computertest { public static void main(String[] args) { // TODO Auto-generated method stub computer p1 = new computer(); p1.color='a'; p1.cpu=33; p1.com(); } }
定义两个类,描述如下: [必做题]
1定义一个人类Person:
1.1定义一个方法sayHello(),可以向对方发出问候语“hello,my name is XXX”
1.2有三个属性:名字、身高、体重
2定义一个PersonCreate类:
2.1创建两个对象,分别是zhangsan,33岁,1.73;lishi,44,1.74
2.2分别调用对象的sayHello()方法。
package demo8_1eighthweek_Thursday; public class Person { String name; double height; int age; public void sayHello() { System.out.println("hello,my name is" + name); System.out.println("my height is" + height); System.out.println("my age is" + age); } }
package demo8_1eighthweek_Thursday; public class PersonCreate { public static void main(String[] args) { // TODO Auto-generated method stub Person p1 = new Person(); p1.name="zhangsan"; p1.age=33; p1.height=1.73; Person p2 = new Person(); p2.name="lisi"; p2.age=44; p2.height=1.74; p1.sayHello(); p2.sayHello(); } }