我的程序在执行时没有打印出任何内容

Question

我正在做一个剪刀程序，在我的代码中，如果您向下滚动到determineWinner()方法，我已经设置好了，但是在main()方法中，当我调用它时，它不会显示是否您赢了，被绑或输了。

这是我的主要方法：

public class RockPaperScissorsMain {

    public static void main(String[] args) {
        RockPaperScissorsClass rc = new RockPaperScissorsClass();
        System.out.println("Player is: " + rc.getPlayer());
        System.out.println("Computer is: " + rc.getComputer());
        System.out.println(rc.determineWinner());
    }
}

这是我的课。

public class RockPaperScissorsClass {

private int wins;
private int losses;
private int ties;
private int CChoice;
private int PChoice;

public RockPaperScissorsClass(int wins, int losses, int ties, int computerPick, int playerPick) {
    this.wins=wins;
    this.losses=losses;
    this.ties=ties;
    this.CChoice=CChoice;
    this.PChoice=PChoice;
}
public String getPlayer() {

    Scanner in = new Scanner(System.in);
    System.out.println("Enter Choice(1=Rock, 2=Paper, 3=Scissors)-->");
    int PPChoice = in.nextInt();
    String PChoice = null;
    if(PPChoice==1) {
        PChoice="Rock";
    }
    else if(PPChoice==2) {
        PChoice="Paper";
    }
    else if(PPChoice==3) {
        PChoice="Scissors";
    }
    else {
        while(true) {
        System.out.println("You have entered an invalid choice. Please try again.");
        System.out.println("Enter Choice(1=Rock, 2=Paper, 3=Scissors)-->");
        PPChoice = in.nextInt();
        if(PPChoice==1) {
            PChoice="Rock";
            break;
        }
        else if(PPChoice==2) {
            PChoice="Paper";
            break;
        }
        else if(PPChoice==3) {
            PChoice="Scissors";
            break;
        }
    }
    return PChoice;
}

public String getComputer() {
    Random rand = new Random();
    int CCChoice = rand.nextInt(3)+1;
    String CChoice = null;
    if(CCChoice==1) {
        CChoice="Rock";
    }
    else if(CCChoice==2) {
        CChoice="Paper";
    }
    else if(CCChoice==3) {
        CChoice="Scissors";
    }
    return CChoice;
}
public String determineWinner() {
    String detWinner = "";
    if(PChoice==1 && CChoice==2) {
        detWinner  = "You Lose";
    }
    else if(PChoice==1 && CChoice==3) {
        detWinner = "You Win";
    }
    else if(PChoice==2 && CChoice==3) {
        detWinner  = "You Lose";
    }
    else if(PChoice==2 && CChoice==1) {
        detWinner = "You Win";
    }
    else if(PChoice==3 && CChoice==1) {
        detWinner  = "You Lose";
    }
    else if(PChoice==3 && CChoice==2) {
        detWinner = "You Win";
    }
    else if(PChoice==1 && CChoice==1){
        detWinner = "You Have Tied";
    }
    else if(PChoice==2 && CChoice==2) {
        detWinner = "You Have Tied";
    }
    else if(PChoice==3 && CChoice==3){
        detWinner = "You Have Tied";
    }
    return detWinner;
}

public RockPaperScissorsClass() {this(0,0,0,0,0);}  
public void setPlayer(int p) {CChoice = p;}

}

Answer 1

您正在用局部变量遮盖字段

例如

int PPChoice = in.nextInt();

改成

PPChoice = in.nextInt();

编辑

实际上，情况更糟，您正在使用其他类型的变量。 局部变量是字符串。 IMO完全摆脱了String，甚至没有使用过。

尝试一些类似的代码

    Scanner in = new Scanner(System.in);

    PChoice = 0;
    while (PChoice == 0) {

        System.out.println("Enter Choice(1=Rock, 2=Paper, 3=Scissors)-->");
        PChoice = in.nextInt();
    }

Answer 2

调用get方法时，应该同时设置播放器和计算机的选择。 固定在下面。

import java.util.Scanner;
import java.util.Random;
public class RockPaperScissorsClass {

private int wins;
private int losses;
private int ties;
private int CChoice;
private int PChoice;

public RockPaperScissorsClass()
{
    this(0,0,0,0,0);
}

public RockPaperScissorsClass(int wins, int losses, int ties, int computerPick, int playerPick) 
{
    this.wins=wins;
    this.losses=losses;
    this.ties=ties;
    this.CChoice=computerPick;
    this.PChoice=playerPick;
}

public void setPlayer(int p)
{
    PChoice = p;
}

public String getPlayer()
{

    Scanner in = new Scanner(System.in);
    System.out.println("Enter Choice(1=Rock, 2=Paper, 3=Scissors)-->");
    int PPChoice = in.nextInt();
    String PChoice = null;
    if(PPChoice==1)
    {
        PChoice="Rock";
    }
    else if(PPChoice==2)
    {
        PChoice="Paper";
    }
    else if(PPChoice==3)
    {
        PChoice="Scissors";
    }
    else
    {
        while(true)
        {
        System.out.println("You have entered an invalid choice. Please try again.");
        System.out.println("Enter Choice(1=Rock, 2=Paper, 3=Scissors)-->");
        PPChoice = in.nextInt();
        if(PPChoice==1)
        {
            PChoice="Rock";
            break;
        }
        else if(PPChoice==2)
        {
            PChoice="Paper";
            break;
        }
        else if(PPChoice==3)
        {
            PChoice="Scissors";
            break;
        }
    }
    }
    this.setPlayer(PPChoice);
    return PChoice;
}

public void setComputer(int c){
    CChoice = c;
}

public String getComputer()
{
    Random rand = new Random();
    int CCChoice = rand.nextInt(3)+1;
    String CChoice = null;
    if(CCChoice==1)
    {
        CChoice="Rock";
    }
    else if(CCChoice==2)
    {
        CChoice="Paper";
    }
    else if(CCChoice==3)
    {
        CChoice="Scissors";
    }
    this.setComputer(CCChoice);
    return CChoice;
}




public String determineWinner() 
{
    String detWinner = "";
    if(PChoice==1 && CChoice==2)
    {
        detWinner  = "You Lose";
    }
    else if(PChoice==1 && CChoice==3)
    {
        detWinner = "You Win";
    }
    else if(PChoice==2 && CChoice==3)
    {
        detWinner  = "You Lose";
    }
    else if(PChoice==2 && CChoice==1)
    {
        detWinner = "You Win";
    }
    else if(PChoice==3 && CChoice==1)
    {
        detWinner  = "You Lose";
    }
    else if(PChoice==3 && CChoice==2)
    {
        detWinner = "You Win";
    }
    else if(PChoice==1 && CChoice==1)
    {
        detWinner = "You Have Tied";
    }
    else if(PChoice==2 && CChoice==2)
    {
        detWinner = "You Have Tied";
    }
    else if(PChoice==3 && CChoice==3)
    {
        detWinner = "You Have Tied";
    }
    return detWinner;


}

}