从不同 类 打印 toString
Print toString from different classes
一段时间以来，我一直在努力解决这个问题，我搜索了各种问题，但我认为我离答案还很近。
我有一辆超级class 车辆，可以提供车辆的各种细节。然后我有我的 Car class 继承自 Vehicle.
我正在尝试从我的 Car class 打印 toString，它覆盖了 Vehicle class。
基本上我想打印出每辆车的信息。
这是我的主要内容
public static void main(String []args)
{
Car Ford = new Car(Red, 4, true);
//Ford = Ford.; Tried various things here to no avail, kept getting nullfalse in output
Car Honda = new Car(Blue, 4, false);
System.out.println(Ford.vehicleDetails);
System.out.println("Honda");
}
}
这是我的车class
public class Vehicle
{
// Variables
private String vehicleColour;
private int numberOfWheels;
String vehicleDetails;
// Constructor
public Vehicle(String vehicleColour, int numberOfWheels)
{
}
// Getters
public String getVehicleColour()
{
return vehicleColour;
}
public int getNumberOfWheels()
{
return numberOfWheels;
}
// Setters
public void setVehicleColour(String vehicleColour)
{
this.vehicleColour = vehicleColour;
}
public void setNumberOfWheels(int numberOfWheels)
{
this.numberOfWheels = numberOfWheels;
}
// Constructor
public Vehicle ()
{
}
// toString method super
public String toString() {
String vehicleDetails = (getVehicleColour() + "" + getNumberOfWheels());
return vehicleDetails;
}
}
这是我的车class
public class Car extends Vehicle
{
// Variables
private boolean convertible;
Car vehicleDetails;
// Getter
public boolean getConvertible()
{
return convertible;
}
// Setter
public void setConvertible(boolean convertible)
{
this.convertible = convertible;
}
// Constructor
public Car(String vehicleColour, int numberOfWheels, boolean convertible) {
}
// toString method override
@Override
public String toString() {
return super.toString() + convertible;
}
}
我希望我的输出类似于 "The Ford is red, has 4 wheels and is a convertible"，粗体文本分别来自 Vehicle 和 Car classes。
如何让粗体文本显示在输出中？现在我只得到默认值，例如 null、0 和 false。
感谢任何意见，我知道我可能正在做一些非常愚蠢的事情，这些事情非常明显，但我就是看不到。
谢谢。
I want my output to be something like "The Ford is red, has 4 wheels
and is a convertible", with bold text coming from Vehicle and Car
classes respectively.
如果你想包含这些词，那么你必须告诉它在你的 toString() 中包含这些词。
例如，如果你想让它打印"has 4 wheels"，那么你不能只做getNumberOfWheels()。否则你只会得到 4。你必须做类似 "has " + getNumberOfWheels() + " wheels" 的事情。如果你不告诉它包含所有的单词，它就不会知道包含它们。
I want my output to be something like "The Ford is red, has 4 wheels and is a convertible"
针对您的上述需求简单的解决方案：
System.out.println("The Ford is "+ Ford.toString() );
如果您打算从 Ford.toString 获取全部输出，那么在创建 Ford 对象时您还需要传递 汽车名称 ！如下所示，并在构造函数中对其进行必要的更改！
Car Ford = new Car("Ford","Red", 4, true);
但是 Car 和 Vehicle class 中的构造函数被创建，但没有为它们的局部变量赋值！因此 .toString() 没有得到任何显示！
所需的更改是：
主线 Class
System.out.println("The Ford is "+ Ford.toString() );
在车里Class
//change in the constructor
public Car(String vehicleColour, int numberOfWheels, boolean convertible) {
setNumberOfWheels(numberOfWheels);
setVehicleColour(vehicleColour);
setConvertible(convertible);
}
I am trying to print the toString from my Car class, which overides the Vehicle class.
//change in toString()
@Override
public String toString() {
if(convertible){
return super.toString() +"and is a convertible" ;
}else{
return super.toString() +"and is not a convertible" ;
}
}
在车里Class
//change the constructor
public Vehicle(String vehicleColour, int numberOfWheels)
{
setNumberOfWheels(this.numberOfWheels);
setVehicleColour(this.vehicleColour);
}
Basically I want to print out the information about each car.
//change the toString()
public String toString() {
String vehicleDetails = (getVehicleColour() + ", has " +getNumberOfWheels()+" wheels");
return vehicleDetails;
}
一段时间以来，我一直在努力解决这个问题，我搜索了各种问题，但我认为我离答案还很近。
我有一辆超级class 车辆，可以提供车辆的各种细节。然后我有我的 Car class 继承自 Vehicle.
我正在尝试从我的 Car class 打印 toString，它覆盖了 Vehicle class。
基本上我想打印出每辆车的信息。
这是我的主要内容
public static void main(String []args)
{
Car Ford = new Car(Red, 4, true);
//Ford = Ford.; Tried various things here to no avail, kept getting nullfalse in output
Car Honda = new Car(Blue, 4, false);
System.out.println(Ford.vehicleDetails);
System.out.println("Honda");
}
}
这是我的车class
public class Vehicle
{
// Variables
private String vehicleColour;
private int numberOfWheels;
String vehicleDetails;
// Constructor
public Vehicle(String vehicleColour, int numberOfWheels)
{
}
// Getters
public String getVehicleColour()
{
return vehicleColour;
}
public int getNumberOfWheels()
{
return numberOfWheels;
}
// Setters
public void setVehicleColour(String vehicleColour)
{
this.vehicleColour = vehicleColour;
}
public void setNumberOfWheels(int numberOfWheels)
{
this.numberOfWheels = numberOfWheels;
}
// Constructor
public Vehicle ()
{
}
// toString method super
public String toString() {
String vehicleDetails = (getVehicleColour() + "" + getNumberOfWheels());
return vehicleDetails;
}
}
这是我的车class
public class Car extends Vehicle
{
// Variables
private boolean convertible;
Car vehicleDetails;
// Getter
public boolean getConvertible()
{
return convertible;
}
// Setter
public void setConvertible(boolean convertible)
{
this.convertible = convertible;
}
// Constructor
public Car(String vehicleColour, int numberOfWheels, boolean convertible) {
}
// toString method override
@Override
public String toString() {
return super.toString() + convertible;
}
}
我希望我的输出类似于 "The Ford is red, has 4 wheels and is a convertible"，粗体文本分别来自 Vehicle 和 Car classes。
如何让粗体文本显示在输出中？现在我只得到默认值，例如 null、0 和 false。
感谢任何意见，我知道我可能正在做一些非常愚蠢的事情，这些事情非常明显，但我就是看不到。
谢谢。
I want my output to be something like "The Ford is red, has 4 wheels and is a convertible", with bold text coming from Vehicle and Car classes respectively.
如果你想包含这些词，那么你必须告诉它在你的 toString() 中包含这些词。
例如，如果你想让它打印"has 4 wheels"，那么你不能只做getNumberOfWheels()。否则你只会得到 4。你必须做类似 "has " + getNumberOfWheels() + " wheels" 的事情。如果你不告诉它包含所有的单词，它就不会知道包含它们。
I want my output to be something like "The Ford is red, has 4 wheels and is a convertible"
针对您的上述需求简单的解决方案：
System.out.println("The Ford is "+ Ford.toString() );
如果您打算从 Ford.toString 获取全部输出，那么在创建 Ford 对象时您还需要传递 汽车名称 ！如下所示，并在构造函数中对其进行必要的更改！
Car Ford = new Car("Ford","Red", 4, true);
但是 Car 和 Vehicle class 中的构造函数被创建，但没有为它们的局部变量赋值！因此 .toString() 没有得到任何显示！
所需的更改是：
主线 Class
System.out.println("The Ford is "+ Ford.toString() );
在车里Class
//change in the constructor
public Car(String vehicleColour, int numberOfWheels, boolean convertible) {
setNumberOfWheels(numberOfWheels);
setVehicleColour(vehicleColour);
setConvertible(convertible);
}
I am trying to print the toString from my Car class, which overides the Vehicle class.
//change in toString()
@Override
public String toString() {
if(convertible){
return super.toString() +"and is a convertible" ;
}else{
return super.toString() +"and is not a convertible" ;
}
}
在车里Class
//change the constructor
public Vehicle(String vehicleColour, int numberOfWheels)
{
setNumberOfWheels(this.numberOfWheels);
setVehicleColour(this.vehicleColour);
}
Basically I want to print out the information about each car.
//change the toString()
public String toString() {
String vehicleDetails = (getVehicleColour() + ", has " +getNumberOfWheels()+" wheels");
return vehicleDetails;
}