Write a Car Car, the Car has the following attributes:
Brand: brand, type String; Engine: engineDisplacement, type is double; Speed: speed, type of double; Status: status, type of Boolean; Top speed: maxSpeed, a type of double,
The Car has the following methods:
Method: the Car (String brand, double engineDisplacement, double maxSpeed), the method USES the value of the variable parameter is set members,
Start: start (), the value of this method makes the status becomes true;
Acceleration: speedUp (), when the car is in a state of start, each time the method invocation, speed increase 5, but shall not be higher than the highest speed per hour,
Slow: slowDown (), when the car is in a state of start, each time the method invocation, speed reduction of 5, but shall not be less than zero speed,
Stall: stop (), when the speed is zero, the status of values into a false,
Each method in addition to change member variables, but also print out after method execution status and speed,
Write the main method to instantiate a Car object, its brand is "red flag", displacement of 2.0, a top speed of 160.00, start the Car, speed up to 120, then slowed to zero, the last stall,

CodePudding user response:

 
Public class Car {

Private String brand; 
Private double engineDisplacement; 
Private double maxSpeed; 
Private double speed=0; 
Private Boolean status=false; 

Public Car (String brand, double engineDisplacement, double maxSpeed) {
Super (); 
This. Brand=brand; 
Enclosing engineDisplacement=engineDisplacement; 
Enclosing maxSpeed=maxSpeed; 
} 

Public String getBrand () {
Return brand; 
} 

Public void setBrand (String brand) {
This. Brand=brand; 
} 

Public double getEngineDisplacement () {
Return engineDisplacement; 
} 

Public void setEngineDisplacement (double engineDisplacement) {
Enclosing engineDisplacement=engineDisplacement; 
} 

Public double getMaxSpeed () {
Return maxSpeed; 
} 

Public void setMaxSpeed (double maxSpeed) {
Enclosing maxSpeed=maxSpeed; 
} 

Public double getSpeed () {
The return speed; 
} 

Public void setSpeed (double speed) {
This. Speed=speed; 
} 

Public Boolean isStatus () {
Return the status; 
} 

Public void setStatus (Boolean status) {
Enclosing the status=status; 
} 

Public void the start () {
The status=true; 
Print (); 
} 

Public void speedUp () {
If (status) {
Speed=speed + 5 & gt; MaxSpeed? MaxSpeed: speed + 5; 
} 
Print (); 
} 

Public void slowDown () {
If (status) {
Speed=speed - 5 & lt; 0? Zero: speed - 5; 
} 
Print (); 
} 

Public void the stop () {
If (speed==0) {
The status=false; 
} 
Print (); 
} 

Private void print () {
System. The out. Println (" status: "+ status); 
System. The out. Println (" speed: "+ speed); 
} 

Public static void main (String [] args) {
The Car the Car=new Car (" red flag ", 2.0, 160.00); 
The car. The start (); 
While (car. GetSpeed () & lt; 120) {
Car. SpeedUp (); 
} 
While (car. GetSpeed () & gt; 0 {
The car. The slowDown (); 
} 
The car. Stop (); 
} 
}