java - 使用后如何删除一行代码？

Question

我正在创建一个基于文本的游戏系列，以练习 Java 技能并学习更高级的做事方法。

我的问题是，当用户选择拾取黄金或其他元素的选项时，黄金会添加到他们的余额中，但他们可以继续重复拾取相同的黄金

我想要发生的是让用户拿起黄金或元素，然后让选项消失，这样他们就不能继续拿起它。

我的代码很长，所以我也在寻找一种可能缩短它的方法，这将是一场漫长的游戏。

我的问题发生在

守卫军营方法

这是我的代码

package FTK;

import java.util.Scanner;
import java.util.ArrayList;
import java.util.List;
public class findTheKing {

Scanner scan =  new Scanner(System.in);

Scanner enterScan = new Scanner(System.in);

String myWeapon, myArmor, playerName;

int myHP,myGold = 0, monsterHP;

List<String> inv = new ArrayList<String>();

public static void main(String[] args) {

    findTheKing ftk;
    ftk = new findTheKing();
    ftk.playerSetUp();
    ftk.brickRoad();    }

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

public void playerSetUp() {

    myHP = 100;
    myWeapon = "Not Equipped";

    System.out.println("|---------------------------------------------------------------------------------------------|");




    System.out.println("Enter your name.");

    playerName = scan.nextLine();

    System.out.println("Hello " + playerName + ", lets begin your adventure finding the king!");
    enterScan.nextLine();
    System.out.println("Your HP level is: " + myHP + ".");
    System.out.println("Your current weapon is: " + myWeapon + ".");
    System.out.println(inv);

    enterScan.nextLine();
    System.out.println("|---------------------------------------------------------------------------------------------|");

}

public void brickRoad() {

    int choice;
    System.out.println("|---------------------------------------------------------------------------------------------|");
    System.out.println("You are standing in the woods near an old  red brick road worn down from age.\n");
    System.out.println("To the north following the brick road is a castle, king Solomani's castle.\n");
    System.out.println("Far east of you is the General Goods store.\n");
    System.out.println("Following the brick road south leads to a drawbridge, beyond that you can see a cave.\n");
    System.out.println("West of you is a small clearing in the brush.");
    System.out.println("|---------------------------------------------------------------------------------------------|");
    enterScan.nextLine();

    System.out.println("|---------------------------------------------------------------------------------------------|");
    System.out.println("Where would you like to go?");
    System.out.println("1 North");
    System.out.println("2 East");
    System.out.println("3 South");
    System.out.println("4 West");
    System.out.println("|---------------------------------------------------------------------------------------------|");

    choice = scan.nextInt();


    if(choice==1) {
        System.out.println("|---------------------------------------------------------------------------------------------|");
        System.out.println("You make your way up the long red brick road to the castle, ");
        System.out.println("you find a horse and carriage out front, at the top of the steps there are");
        System.out.println(" two guards at the door and a window slightly cracked open.");
        System.out.println("|---------------------------------------------------------------------------------------------|");
        enterScan.nextLine();
        castle();
    }

    if(choice==2) {
        System.out.println("|---------------------------------------------------------------------------------------------|");
        System.out.println("Traveling along to the east you arrive at the General Goods store.\n");
        System.out.println("The sign in the window says open for business.");
        System.out.println("|---------------------------------------------------------------------------------------------|");
        enterScan.nextLine();
        generalGoodsStore();

    }
    if(choice==3) {
        System.out.println("|---------------------------------------------------------------------------------------------|");
        System.out.println("Following the red brick road south takes you to a drawbridge.");
        System.out.println("|---------------------------------------------------------------------------------------------|");
        enterScan.hasNextLine();
        drawBridge();
    }
    if(choice==4) {
        System.out.println("|---------------------------------------------------------------------------------------------|");
        System.out.println("you push through the brush opening and find there is an old shack.");
        System.out.println("|---------------------------------------------------------------------------------------------|");
        enterScan.nextLine();
        shack();



    }
}

public void castle() {

    int choice;

    System.out.println("What's your next move?\n\n");
    System.out.println("|---------------------------------------------------------------------------------------------|");
    System.out.println("1: Sit in the carriage.");
    System.out.println("2: Walk up the steps and talk to the guards.");
    System.out.println("3:  Sneak over to the window while the guards aren't watching.");
    System.out.println("4: Go back.");
    System.out.println("|---------------------------------------------------------------------------------------------|");


    choice = scan.nextInt();

    if (choice==1) {
        System.out.println("|---------------------------------------------------------------------------------------------|");
        System.out.println("You are now sitting in the carriage.");
        System.out.println("You notice there is a shiny object hidden under the seat.");
        System.out.println("|---------------------------------------------------------------------------------------------|");
    }


    if(choice==2) {
        System.out.println("Apon aproaching the guards they greet you but they inform you that ");
        System.out.println("you cannot curently enter the castle as the king is missing.");


    }

    if(choice==3) {
        System.out.println("Now at the window you can see through the crack.");
        System.out.println("Inside the window you can see the guard barracks.");
        System.out.println("It looks as if there is a guard sleeping on a bed to the right of the room.");
        enterScan.nextLine();
        window();
    }

    if(choice==4) {
        brickRoad();    
}
}

public void drawBridge() {

    int choice;

    System.out.println("You arrived at the drawbridge. The bridge is currently up and locked");
    System.out.println("The only way past is to find the key that unlocks the bridge.");
    enterScan.nextLine();

    System.out.println("Type your next action.");

    System.out.println("1: Unlock bridge.");
    System.out.println("2: Go back.");
    choice = scan.nextInt();

    if((choice==1) && (inv.contains("Key"))) {
        //how can i test weather or not the player has obtained the key?
        System.out.println("The bridge has unlocked and lowered, you can now cross!");
        enterScan.nextLine();
        cave();
    }

    else if (choice==1){
        System.out.println("You do not have the key to unlock the bridge yet.");
        enterScan.hasNextLine();
        drawBridge();
    }

    if (choice==2) {
        System.out.println("You go back to The brick road.");
        enterScan.nextLine();
        brickRoad();
    }

}

public void shack() {
    System.out.println("In front of the shack you see a pile of wood, to the left is the shack entrance.");

}
public void guardBarracks() {
    int choice;

    System.out.println("On the table to your right you find 13 gold!");
    System.out.println("Left of you is a door.");
    System.out.println("1: Pick .up gold");
    System.out.println("2: Go through door.");
    System.out.println("3: Go back.");
    choice = scan.nextInt();


    if( choice==1) {
    myGold = myGold + 13;
    System.out.println("You currently have: " + myGold + " gold coins.");
    enterScan.nextLine();
    guardBarracks();

    }
    if(choice==2) {
        System.out.println("You are now in the castle's main hall.");

    }
    if(choice==3) {
    window();   
    }
}
public void window() {
    int choice;
    System.out.println("You can quietly climb through the window or turn back.");
    System.out.println("1: Climb through window.");
    System.out.println("2: Go back");
    choice = scan.nextInt();
    if (choice==1) { 
        System.out.println("You are now in the guard barracks, be quiet!");
        guardBarracks();


    }

    if (choice==2) {
        System.out.println("You go back in front of the castle.");
        castle();
    }
}

public void generalGoodsStore() {
    int choice;
    System.out.println("Welcome, what can we help you with?\n");

        System.out.println("1: Apple 10 gold (heals 8 HP)");
        System.out.println("2: Chicken 18 gold (heals 15 HP)");
        System.out.println("3: Shovel 68 gold");
        System.out.println("4: bridge key 200 gold");
        System.out.println("5: Go back");

        System.out.println("What would you lke to buy?");
        choice = scan.nextInt();

        if ((choice==1) && (myGold >= 10)) {
            inv.add("Apple");
            myGold = myGold - 10;
            System.out.println("You have purchased an apple, enjoy.\n" + "Your current gold is " + myGold);
            enterScan.nextLine();
            generalGoodsStore();

    }
        else if((choice==1) && (myGold < 10)) {
            System.out.println("You do not have enough gold, sorry.");
            enterScan.nextLine();
            generalGoodsStore();

        }



        if ((choice==2) && (myGold >= 15)) {
            inv.add("Chicken");
            myGold = myGold - 15;
            System.out.println("You have purchased some chicken, enjoy.\n" + "Your current gold is " +  myGold);
            enterScan.nextLine();
            generalGoodsStore();
}
        else if((choice==2) && (myGold < 15)) {
            System.out.println("You do not have enough gold, sorry.");
            enterScan.nextLine();
            generalGoodsStore();

        }


        if ((choice==3) && (myGold >= 68)) {
                inv.add("Shovel");
                myGold = myGold - 68;
                System.out.println("You have purchased a shovel, enjoy.\n" + "Your current gold is " +  myGold);
                enterScan.nextLine();
                generalGoodsStore();

}

        else if((choice==3) && (myGold < 68)) {
            System.out.println("You do not have enough gold, sorry.");
            enterScan.nextLine();
            generalGoodsStore();

        }

        if ((choice==4) && (myGold >= 200)) {
                    inv.add("Key");
                    myGold = myGold - 200;
                    System.out.println("You have purchased the drawbridge key, have a safe journey.");
                    System.out.println("You might want to prepare for what lies past the bridge!.\n" +"Your current gold is " + myGold);
                    enterScan.nextLine();
                    generalGoodsStore();


            }

        else if((choice==4) && (myGold < 200)) {
            System.out.println("You do not have enough gold, sorry.");
            enterScan.nextLine();
            generalGoodsStore();

        }

        if (choice==5) {
            System.out.println("You leave the store and go back to the brick road.");
            brickRoad();
        }

}

public void cave() {
    int choice;
    System.out.println("Atlast, you are at the cave entrance!\n");
    System.out.println("The door has been baricaded, looks like you will need an axe to get past\n");
    System.out.println("There is a sign that says 'Keep Out' on an old wooden post.\n ");
    System.out.println("On another sign that has faded almost past legibility you barely make out ");
    System.out.println("the word 'DANGER'.\n");
    System.out.println("There is a path on the right but you cannot see where it leads to.");

    choice = scan.nextInt();

    System.out.println("1: Destroy baricade and enter the old cave.");
    System.out.println("2: Follow the path to wherever it leads.");
    System.out.println("3: Go back. ");

    if((choice==1) && (inv.contains("Axe")) ) {
        System.out.println("Hurray, you destroyed the baricade and entered the cave!");

    }
    else if (choice==1) {
        System.out.println("You need to find an axe to destroy the baricade.");
        enterScan.nextLine();
        cave();
}
    if (choice==2) {
        System.out.println("You follow the path");
        path();

    }
}
public void path() {
    System.out.println("You reach the end of the path, there is nothing but dirt and \nrocks for as far as you can see.");

}
public void castleKitchen() {
    inv.add("Kitchen knife");
    System.out.println(inv);


}


public void fight() {


}
public void Attack(){

int playerDamage = 0;

if(myWeapon.equals("kitchen knife")) {
    playerDamage = new java.util.Random().nextInt(5);   
}
if(myWeapon.equals("axe")) {
    playerDamage = new java.util.Random().nextInt(8);   
}   
System.out.println("You attacked the monster and gave " + playerDamage + "damage.");

monsterHP = monsterHP - playerDamage;

System.out.println("monsterHP:  " + monsterHP);

if(monsterHP<1) {
    win();  
}
if(monsterHP>0) {
    int monsterDamage;

    monsterDamage = new java.util.Random().nextInt(4);

    System.out.println("The monster attacked you and gave " + monsterDamage + " damage.");

    myHP = myHP - monsterDamage;

    System.out.println("Player HP: " + myHP + ".");

    if(myHP<1) {
        System.out.println("You have died.");
        dead();
        }
    if(myHP>0) {
        fight();
}       
}
}
public void win() {

    System.out.println("You kiled the monster");    
}
public void dead() {
    int choice;
    System.out.println("Would you like to restart?\n");
    System.out.println("1: Yes");
    System.out.println("2: No");

    choice = scan.nextInt();

    if(choice==1) {
        playerSetUp();  
    }
    if(choice==2) {
        Exit();
    }
}
public void Exit() {
}
}

任何解决此问题的帮助将不胜感激。

Answer 1

您需要在代码中设置一个条件来确定玩家是否可以选择获取黄金。一旦金子被拿走，改变条件使选择不可用。一旦调用了一行代码，您就不会将其删除，而只是使其不可能多次遇到。

您当前的代码如下所示:

int choice;

System.out.println("On the table to your right you find 13 gold!");
System.out.println("Left of you is a door.");
System.out.println("1: Pick .up gold");
System.out.println("2: Go through door.");
System.out.println("3: Go back.");

这个想法是创建一个条件来显示一组不同的选择，具体取决于黄金是否已被拿走。

int choice;
boolean goldTaken = false;

if(goldTaken)
{
    System.out.println("There is a table to your right.");
    System.out.println("Left of you is a door.");
    System.out.println("1: Go through door.");
    System.out.println("2: Go back.");
}
else
{
    System.out.println("On the table to your right you find 13 gold!");
    System.out.println("Left of you is a door.");
    System.out.println("1: Pick .up gold");
    System.out.println("2: Go through door.");
    System.out.println("3: Go back.");
}

// remember to change the conditional if the player chooses to take the gold

if( choice==1) {
goldTaken = true;
myGold = myGold + 13;

// ... the rest of your existing code

请记住，条件(在我的示例中为goldTaken)必须是全局变量，以便一旦更改该值，它就会在程序运行期间保持不变。