java - 如何将 init() 方法的修改应用到 toString() 中？

Question

当我想通过 toString() 方法显示程序结果时遇到问题。

我的第二个输入的结果是“0.0”，我想要我输入的值。

public void init()
{
    System.out.println("Enter name: ");
    Scanner input = new Scanner(System.in);

    if (input.hasNextLine())
    {
        setName(input.nextLine());
    }

    System.out.println("Enter number (double): ");
    Scanner input2 = new Scanner(System.in);

    if (input2.hasNextDouble())
    {
        setNumber(input2.nextDouble());
    }
}

我的toString方法:

public String toString()
{
    return this.name + " - " + this.number;
}

编辑:

import java.util.*;
import java.lang.*;

public class Branche 
{
    private String name;
    private double number;


    public Branche()
    {

    }

    public String getName()
    {
        return this.name;
    }

    public double getNumber()
    {
        return this.number;
    }

    public void setName(String n)
    {
        this.name = n;
    }

    public void setNumber(double c)
    {
        this.number = c;
    }

    public String toString()
    {
        return this.name + " - " + this.number;
    }

    public void init()
    {
        System.out.println("Enter name: ");
        Scanner input = new Scanner(System.in);

        if (input.hasNextLine())
        {
            setName(input.nextLine());
        }

        System.out.println("Enter number (double): ");
        Scanner input2 = new Scanner(System.in);

        if (input2.hasNextDouble())
        {
            setNumber(input2.nextDouble());
        }
    }
}

测试类:

import java.util.*;

public class TestBranche 
{
    public static void main(String [] args)
    {
        Branche b1 = new Branche();

        b1.init();

        System.out.println(b1);
    }
}

Answer 1

我已经测试了下面的代码并且它可以工作，请检查您的 setname() 和 setNumber() 函数。

并且您只需要一个 Scanner 对象来接受输入，不需要创建多个 Scanner 对象

public class NewClass {

String name;
double number;

    public void init() {

        System.out.println("Enter name: ");
        Scanner input = new Scanner(System.in);

        if (input.hasNextLine()) {
            setName(input.nextLine());
        }

        System.out.println("Enter number (double): ");

        if (input.hasNextDouble()) {
            setNumber(input.nextDouble());
        }
    }

    void setName(String name) {
        this.name = name;
    }

    void setNumber(double number) {
        this.number = number;
    }

    public String toString() {
        return this.name + " - " + this.number;
    }

    public static void main(String args[]) throws Exception {

        NewClass obj = new NewClass();
        obj.init();
        System.out.println(obj);



    }
}

输出

run:
Enter name: 
abc
Enter number (double): 
89.78
abc - 89.78
BUILD SUCCESSFUL (total time: 7 seconds)