Java面向對象技術

class Person
{
public int age;
public void eat()
{
System.out.println("Eatinh...");
}
public void sleep()
{
System.out.println("Sleeping...");
}
}

public class Earth
{
public static void main(String[] args)
{
Person person1 = new Person();
Person person2;
person2 = new Person();
person1.age = 18;
System.out.println("person1:" + person1.age);
System.out.println("person2:" + person2.age);
person1.eat();
person2.sleep();
}
}