Question

JAVA简单问题

设计一个Dog类，有名字、颜色和年龄属性，定义构造方法初始化这些属性，定义输出方法show()显示其信息。编写应用程序使用Dog类。

Answer 1

public class TestDog {
public static void main(String[] args){
Dog dog = new Dog("wangcai","black",5);
dog.show();
}
}

class Dog{
String name;
String color;
int age ;
public Dog(String name,String color,int age){
this.age = age;
this.name = name;
this.color = color;
}

public void show(){
System.out.print("名字是 : "+this.name+"， 颜色是："+this.color+"，年龄是"+this.age);
}
}
结果为：
名字是 : wangcai， 颜色是：black，年龄是5

Answer 2

class Dog {
String name;
String color;
int age;

public Dog(String name, String color, int age) {
this.name = name;
this.color = color;
this.age = age;
}

public void show() {
System.out.println("name is " + this.name + " " + "color is "
+ this.color + " " + "age is " + this.age);
}
}

public class Test {

public static void main(String[] args) {
Dog d = new Dog("nihao", "red", 21);
d.show();

}

}