如何编写toString并减少重复输出

Question

因此，我创建了一个简单的应用程序，用于沿连线移动bug。代码运行良好(大部分情况下(，不过我遇到了一些问题。

当到达电线的末端时，程序会很好地终止，但我得到了双倍的输出，当它到达末端时，它从电线上掉了下来。

我应该为此写一个toString，但我有点难以理解为什么以及如何去做。

如果有人能帮忙，我将不胜感激

import java.util.Scanner;
public class ClassPracticeMain {
public static void main(String [] args) {
Scanner input = new Scanner(System.in);
int userInput;
Bug bug1 = new Bug();
bug1.setInitialPosition();
bug1.setInitialDirection();
System.out.println("Your starting position is " + bug1.initialPosition
+ " and you are facing " + bug1.getCurrentDirection()
);
while (bug1.getExit(1) != 0) {
System.out.println("Which way would you like to move? 1 for left/ 2 for right or 0 for exit");
userInput = input.nextInt();
bug1.move(userInput);
bug1.getCurrentDirection();
bug1.getCurrentPosition();
System.out.println("You are now at " + bug1.currentPosition + " and you are facing " + bug1.getCurrentDirection());
bug1.getExit(userInput);
}
}
}
public class Bug {
final int WIRELEFTEND=-15;
final int WIRERIGHTEND=15;
int initialPosition=0, currentPosition=0, direction,exit=1;
String currentDirection;
String left = "left";
String right = "right";
public int setInitialPosition(){
return initialPosition;
}
public int setInitialDirection(){
direction=1;
return direction;
}
public int getCurrentPosition(){
return currentPosition;
}
public String getCurrentDirection(){
if (direction== 1){
currentDirection=left;
} else if (direction == 2){
currentDirection=right;
}
return currentDirection;
}
public int move(int move){
if(move==1 && direction==1){
currentPosition=currentPosition-1;
return currentPosition;
} else if (move==1 && direction==2){
direction=1;
return currentPosition;
} else if (move==2 && direction==1){
direction=2;
return currentPosition;
} else if (move==2 && direction ==2){
currentPosition=currentPosition+1;
return currentPosition;
}
return 0;
}
public int getExit(int exit){
if(currentPosition<(WIRELEFTEND)||currentPosition>WIRERIGHTEND){
System.out.println("You've fallen off the wire... Oh no!");
exit=0;
} else{
exit=exit;
}
return 1;
}
}

Answer 1

您可能想要编写

public int getExitStatus(){
if(currentPosition<(WIRELEFTEND)||currentPosition>WIRERIGHTEND){
System.out.println("You've fallen off the wire... Oh no!");
return 0;
} 
return 1;
}

而不是您当前的CCD_ 1函数。它总是返回1，并且设置exit参数没有任何作用。