java题目 ，那位高手帮忙做一下，谢谢了 Java题目，高手麻烦帮忙做一下！

public class Dog {

    private String name;
    private String color;
    private int weight;
    private int age;
    
    public Dog() {
        
    }
    
    public Dog(String name, String color, int weight, int age) {
        this.name = name;
        this.color = color;
        this.weight = weight;
        this.age = age;
    }
    
    public String toString() {
        String returnStr = "Dog name:" + this.name + " Dog color:" + this.color
                         + " Dog weight:" + this.weight + " Dog age" + this.age;
        return returnStr;
    }
    
    public void shoot() {
        System.out.println("This is " + this.name +" shoot!");
    }
    
    public void bite() {
        System.out.println("This is " + this.name + " bite");
    }
    
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getColor() {
        return color;
    }
    public void setColor(String color) {
        this.color = color;
    }
    public int getWeight() {
        return weight;
    }
    public void setWeight(int weight) {
        this.weight = weight;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    
    public static void main(String[] args) {
        Dog dog1 = new Dog("Dog1", "white", 5, 4);
        Dog dog2 = new Dog("Dog2", "red", 6 , 4);
        dog1.shoot();
        dog2.bite();
    }
}

已经试验过了

package dog;
public class Dog { private String dogName; private String dogColor; private int dogAge;
public Dog() {
}
public Dog(String name, String color, int age) { dogName = name; dogColor = color; dogAge = age; }
private void Away() { System.out.println("汪汪"); }
private void Bite() { System.out.println("撕咬"); }
public String toString() { return "名字：" + this.dogName + "颜色：" + this.dogColor + "年龄：" + this.dogAge; }
public static void main(String[] args) { Dog dog1 = new Dog("哈巴狗", "棕色", 1); System.out.println(dog1.toString()); dog1.Away();
Dog dog2 = new Dog("牧羊犬", "黑色", 1); System.out.println(dog1.toString()); dog2.Bite(); }
}

run结果：
名字：哈巴狗颜色：棕色年龄：1汪汪名字：哈巴狗颜色：棕色年龄：1撕咬

public class Dog
{
private String name;
private String color;
private int age;
private double body;
public String getName()
{
return name;
}
public void setName(String name)
{
this.name = name;
}
public String getColor()
{
return color;
}
public void setColor(String color)
{
this.color = color;
}
public int getAge()
{
return age;
}
public void setAge(int age)
{
this.age = age;
}
public double getBody()
{
return body;
}
public void setBody(double body)
{
this.body = body;
}

public Dog()
{
System.out.println("dog is coming");
}
public Dog(String name, String color, int age, double body)
{
super();
this.name = name;
this.color = color;
this.age = age;
this.body = body;
}

public String toString()
{
return this.getName()+":"+this.getAge();
}

public void yao()
{
System.out.print(this.getName()+"咬了");
}

public void jiao()
{
System.out.print(this.getName()+"叫了");
}

public final static void main()
{
Dog d1 = new Dog();
d1.setName("狗1");
d1.yao();

Dog d2 = new Dog();
d2.setName("狗2");
d2.jiao();
}

}

java题目，那位高手帮忙做一下，谢谢了~

第6问的文字问题描述不是很理解。稍微写了下。

public class Student {

//无参构造函数
public Student(){}

//有参构造函数
public Student(String no, String name, int age){
this.no = no;
this.age = age;
this.name = name;
}

private String no;//学号
private String name;//名称
private int age;//年龄

//-----------------------------Set 跟 Get 方法 start ------------------
public String getNo() {
return no;
}
public void setNo(String no) {
this.no = no;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
//-----------------------------Set 跟 Get 方法 end ------------------

//重写toString方法
@Override
public String toString() {
return "我的名字叫：".concat(name).concat("，学号是：").concat(no).concat("，今年").concat(age+"岁了！");
}

//计算学生总数的方法(大概多此一举)
public static int getCount(List list){
return list.size();
}

//程序入口
public static void main(String[] args) {
//保存多个学生对象的集合
List list = new ArrayList();

//学生对象1
Student stu = new Student();
stu.setAge(18);
stu.setName("小明");
stu.setNo("00001");
System.out.println(stu.toString());
list.add(stu);

//学生对象2
stu = new Student("00002", "小花", 22);
System.out.println(stu.toString());
list.add(stu);

System.out.println("共有学生人数："+getCount(list)+"人");//输出学生对象集合总数
}
}

public interface Computer {
public void poweron();
}
class PC implements Computer{
public void poweron() {
System.out.println("PC实现Computer接口");
}

}
class Laptop implements Computer{
public void poweron() {
stem.out.println("Laptop实现Computer接口");
}

}


public class Test {
public static void main(String[] args) {
Computer pc=new PC();
Computer laptop=new Laptop();
pc.poweron();
laptop.poweron();
}
}