我的代码有递归——execute() 再次调用() 等等。我正在考虑在 main() 或 execute() 处使用 do/while 循环来消除这种情况，但如果我这样做了，则询问用户的字符串是否他们想再玩一次就会超出范围。我不能在循环之前或之后使用 console2 — 问他们是否想在开始时再次播放是没有意义的。随意指出我的初学者代码的任何缺陷，因为可能有很多。谢谢。
到目前为止，这是我的代码——带有递归：
import java.util.*;
import java.awt.*;
import java.io.*;
public class RockPaperScissors {
public static int count = 0;
public static void main(String[] args) {
execute();
}
public static void execute(){
System.out.println("This program will allow you to play \n\"Rock, Paper, Scissors\" against a computer.");
System.out.println();
System.out.println("Enter 'r' for Rock, 'p' for Paper, or s for Scissors.");
System.out.println("Enter 'w' to have an insta-win for that round. Enter '-1' at anytime to exit program.");
String info = userInput();
int value = guessCode();
decideOutcome(value, info);
again();
}
public static String userInput() {
Scanner console = new Scanner (System.in);
String s = console.next();
return s;
}
public static int guessCode() {
Random r = new Random ();
return (r.nextInt(3)+1); // Random integer between 1 and 3;
}
public static void decideOutcome(int i, String j) {
try {
PrintStream output = new PrintStream(new FileOutputStream("records.txt", true));
if (j.equalsIgnoreCase("rock")|| j.equalsIgnoreCase("r")) {
count++;
switch (i){
case 1:
System.out.println("You've won! Computer picked scissors.");
output.println(count + " Win ");
break;
case 2:
System.out.println("You've tied.... Computer also picked rock.");
output.println(count + " Tie ");
break;
case 3:
System.out.println("You've lost. Computer picked paper.");
output.println(count + " Loss ");
break;
}
} else if (j.equalsIgnoreCase("paper")|| j.equalsIgnoreCase("p")) {
count++;
switch (i){
case 1:
System.out.println("You've lost; Computer picked scissors.");
output.println(count + " Loss ");
break;
case 2:
System.out.println("You've won! Computer picked rock.");
output.println(count + " Win ");
break;
case 3:
System.out.println("You've tied.... Computer also picked paper.");
output.println(count + " Tie ");
break;
}
} else if (j.equalsIgnoreCase("scissors")|| j.equalsIgnoreCase("s")) {
count++;
switch (i){
case 1:
System.out.println("You've tied.... Computer picked scissors.");
output.println(count + " Tie ");
break;
case 2:
System.out.println("You've lost; Computer picked rock.");
output.println(count + " Loss ");
break;
case 3:
System.out.println("You've won! Computer also picked paper.");
output.println(count + " Win ");
break;
}
} else if (j.equalsIgnoreCase("w")) {
count++;
System.out.println("You've effortlessly defeated the computer!");
output.println(count + " Win ");
} else if (j.equals("-1")) {
System.out.println("Thanks for playing!"); // need to find way to reach end.
if (count == 1) { // If the user terminates after the first match.
System.out.println("You've played a single match.");
} else if (count > 1) { // Anything more than 1 match played upon termination.
System.out.println("You've played " + count + " matches total.");
} else { // This is for exceptions when user inputs gibberish for their sign and then 'no' for the second input.
System.out.println("No matches were played.");
}
System.out.println("Good Bye!");
System.exit(0);
} else {
System.out.println("You didn't input the right thing.");
}
} catch (FileNotFoundException e) {
System.out.println("File was not found; try again");
}
}
public static void again() {
System.out.println("Do you want to play again? (Type in 'y' for Yes or 'n' for No.)");
Scanner console2 = new Scanner (System.in);
String t = console2.next();
while (t.equalsIgnoreCase("yes")||t.equalsIgnoreCase("y")) {
System.out.println();
System.out.println();
execute(); //
}
if (t.equalsIgnoreCase("no") || t.equalsIgnoreCase("n") || t.equals("-1")) {
System.out.println("Hope you had fun! I'm sure I've had just as much fun with making this program! Good Bye!");
if (count == 1) { // If the user terminates after the first match.
System.out.println("You've played a single match.");
} else if (count > 1) { // Anything more than 1 match played upon termination.
System.out.println("You've played " + count + " matches total.");
} else { // This is for exceptions when user inputs gibberish for their sign and then 'no' for the second input.
System.out.println("No matches were played.");
}
System.exit(0);
} else { // If the user doesn't input 'yes' or 'no.'
System.out.println("Not the proper response, but it's assumed that you don't want to continue.");
if (count == 1) { // If the user terminates after the first match.
System.out.println("You've completed a single match.");
} else if (count >= 2) { // Anything more than 1 match played upon termination.
System.out.println("You've completed " + count + " matches total.");
} else { // The user haphazardly messes up both inputs.
System.out.println("No matches were finished.");
}
System.exit(0);
}
}
}