java - Java 比较构造函数对象

Question

多么棒的平台啊!我希望我没有问一个太愚蠢的问题，但我一直在寻找答案但没有成功。

问:是否可以比较构造函数创建的对象值？就像我想让动物打斗并相互比较“str”值一样。我的目标是在 Animal 类中创建“战斗”方法，而不是在 main 类中。这样，我就可以将其称为“dog.fight();

”

请参阅我的代码示例(抱歉我的英语)

public class Animal {

private int str;
private int agi;
private String name;
private String eyeColour;


public void set (int strenght, int agility, String _name){
    str = strenght;
    agi = agility;
    name = _name;

}
public String get (){
    System.out.println("Created a new animal named " + name +"! ");
    System.out.println(name + "'s agility is " + agi);
    System.out.println(name + "'s strenght is " + str);

    return name + str + agi;
}       

}

import java.util.Scanner;

public class Hello {

public static void main(String[] args) {

    Animal dog = new Animal ();
    dog.set(8, 4, "Rambo");
    dog.get();

    System.out.println("");
    Animal cat = new Animal ();
    cat.set(2, 9, "Felix");
    cat.get();


}
}

Answer 1

您需要在 Animal 类中创建一个“fight”方法，该方法将 Animal 对象作为参数，并使用它向您返回获胜者的结果。

这是代码:

public class Animal  {

    private int str;
    private int agi;
    private String name;
    private String eyeColour;


    public void set (int strenght, int agility, String _name){
        str = strenght;
        agi = agility;
        name = _name;

    }
    public String get (){
        System.out.println("Created a new animal named " + name +"! ");
        System.out.println(name + "'s agility is " + agi);
        System.out.println(name + "'s strenght is " + str);

        return name + str + agi;
    }

    public String fight(Animal rival){
        //Provide Comparison Logic Here
        if(this.str>rival.str)return this.name;
        if(this.str < rival.str)return rival.name;
        return "No One ";
    }
}


public class Hello {

    public static void main(String[] args) {

        Animal dog = new Animal ();
        dog.set(8, 4, "Rambo");
        dog.get();

        System.out.println("");
        Animal cat = new Animal ();
        cat.set(2, 9, "Felix");
        cat.get();

        System.out.println(dog.fight(cat)+" is the winner! ");

    }
}

这里有一个小注释:

这里最好使用构造函数而不是 set 方法，因为通常会创建 setter 和 getter 来设置或获取单个变量。

此外，最好更改 get 方法的名称并覆盖 toString 方法。

修改后的代码如下:

public class Animal  {

    private int str;
    private int agi;
    private String name;
    private String eyeColour;


    public Animal (int str, int agi, String name){
        this.str = str;
        this.agi = agi;
        this.name = name;
    }

    @Override
    public String toString(){
        String description = "Created a new animal named " + name +"!\n";
        description+=name + "'s agility is " + agi+"\n";
        description+=name + "'s strenght is " + str;
        return description;
    }

    public String fight(Animal rival){
        //Provide Comparison Logic Here
        if(this.str>rival.str)return this.name;
        if(this.str < rival.str)return rival.name;
        return "No One ";
    }
}


public class Hello {

    public static void main(String[] args) {

        Animal dog = new Animal (8, 4, "Rambo");
        System.out.println(dog);

        System.out.println();
        Animal cat = new Animal (2, 9, "Felix");
        System.out.println(cat);

        System.out.println(dog.fight(cat)+" is the winner! ");

    }
}