使用if语句时，为什么我的代码没有给出正确的答案？

Question

This is the class that contains main.

import java.util.Random;

public class RandomTest {

    public static void main(String[] args) {
        String name;
        Random r = new Random();
        int number = 1 + r.nextInt(3);

        System.out.println(number);

        if (number == 1) {
            name = "Kobe";
        }
        else if (number == 2) {
            name = "Mamba";
        }
        else {
            name = "lol";
        }

        RandomTest2 object = new RandomTest2(name);
        System.out.println(object.toString());
    }
}

This class contains other methods.

public class RandomTest2 {

    private String name;

    public RandomTest2(String name) {
        name = name;
    }

    public String getName() {
        return name;
    }

    public String toString() {
        return getName();
    }
}

If I remove the If statement and I assign a value directly to name, it works..

I just want to randomly assign properties to the object.

Answer 1

You just missed a this in your constructor:

public RandomTest2(String name) {
    this.name = name;
}

Without it, you are just assigning the name parameter to itself.

No worries, this gets every Java coder at least once ;-)

Answer 2

Instead of name = name as shown below

RandomTest2(String name) {
    name = name;
}

Try

this.name=name;

Answer 3

on this function:

public RandomTest2(String name) {
    name = name;
}

the compiler is understand that you assign name to itself not for the name variable on RandomTest2. So change it to this.name = name.

Answer 4

类RandomTest2->构造方法-> this.name = name