[英]Passing Values from Constructor to a Method
我的项目要求我制作一个游戏,其中两艘太空船在游戏板上移动。 我不太确定如何从我的构造函数中获取我的X和Y位置值到我的主程序中的方法。
我得到了我的教授的一些帮助,他说将X和Y值传递给我的印刷板方法我试图在我的印刷板声明中使用ship1.XPos,ship1.YPos,ship2.XPos,ship2.YPos但是我有关VariableDeclaratiorId的错误。
这是我目前的主要内容
Java
package ship;
import java.util.*;
public class ShipGame {
public static String[][] makeBoard() {
String[][] f = new String[6][22];
for (int i = 0; i < f.length; i++) {
for (int j = 0; j < f[i].length; j++) {
if (j % 2 == 0)
f[i][j] = "|";
else
f[i][j] = " ";
}
}
return f;
}
public static void printBoard(String[][] f, ship1.XPos, ship1.YPos, ship2.XPos, ship2.YPos) {
for (int i = 0; i < f.length; i++) {
for (int j = 0; j < f[i].length; j++) {
if(x == ship1.XPos && y == ship1.YPos){
System.out.print(ship1);
}
else if (x == ship2.XPos && y == ship2.YPos){
System.out.ptint(ship2);
}
else{
System.out.print(f[i][j]);
}
System.out.println();
}
}
}
public static void main(String[] args) {
int engine;
System.out.println("Welcome First Captian! What kind of ship would you like to create: ");
System.out.println("1. Battlecruiser");
System.out.println("2. Destroyer");
Scanner scan = new Scanner(System.in);
engine = scan.nextInt();
scan.nextLine();
String engineType;
if (engine == 1) {
engineType = "Battlecrusier";
}
else {
engineType = "Destroyer";
}
System.out.println("What would you like to name your vessel?");
String shipName1 = scan.nextLine();
Spaceship1 ship1 = new Spaceship1(shipName1, engineType);
System.out.println("Welcome Second Captian! What kind of ship would you like to create: ");
System.out.println("1. Battlecruiser");
System.out.println("2. Destroyer");
engine = scan.nextInt();
scan.nextLine();
if (engine == 1) {
engineType = "Battlecrusier";
}
else {
engineType = "Destroyer";
}
System.out.println("What would you like to name your vessel?");
String shipName2 = scan.nextLine();
Spaceship2 ship2 = new Spaceship2(shipName2, engineType);
String[][] f = makeBoard();
int count = 0;
printBoard(f);
boolean gaming = true;
while (gaming) {
if (count % 2 == 0) {
ship1.movement1(f);
}
else {
ship2.movement2(f);
}
count++;
printBoard(f, ship1.XPos, ship1.YPos, ship2.XPos, ship2.YPos );
gaming = false;
}
}
}
这是我的Spaceship1构造函数。 它与我的Spaceship2构造函数相同,因此无需添加它
Java
package ship;
import java.util.Random;
import java.util.Scanner;
public class Spaceship1 extends ship {
private String ship1;
public Spaceship1(String shipName, String engineType) {
super(shipName, engineType);
double maxSpeed = Math.random() * 2 + 1;
int shipHealth = (int) (Math.random() * 100 + 50);
int attackPower = (int) (Math.random() * 20 + 5);
Random rand = new Random();
int newXPos = rand.nextInt(9);
int newYPos = rand.nextInt(9);
setShipHealth(shipHealth);
setMaxSpeed(maxSpeed);
setAttackPower(attackPower);
setXPos(newXPos);
setYPos(newYPos);
}
public void movement1(String[][] f) {
System.out.println("W Move Up");
System.out.println("S Move Down");
System.out.println("A Move Left");
System.out.println("D Move Right");
Scanner scan = new Scanner(System.in);
String move = scan.nextLine();
int standX = getXPos();
int standY = getYPos();
double standS = getMaxSpeed();
if(move == "W")
{
standY += standS;
setYPos(standY);
}
else if(move == "S")
{
standY += standS;
setYPos(standY);
}
else if(move == "A")
{
standY += standS;
setYPos(standY);
}
else if(move == "D")
{
standY += standS;
setYPos(standY);
}
}
}
我希望在我的游戏板上宣称为6x22的任何空间都有Ship1和Ship2这两个词。
定义方法时,需要使用它们用于引用这些参数的类型和名称来定义它接受的参数。 例如,您的代码:
public static void printBoard(String[][] f, ship1.XPos, ship1.YPos, ship2.XPos, ship2.YPos)
应该像这样写:
public static void printBoard(String[][] f, int ship1Xpos, int ship1Ypos, int ship2Xpos, int ship2Ypos)
您的代码不起作用的原因是您尝试使用要传递给它的值来定义方法(例如, ship1.XPos
)。 当你想调用方法时,你可以给它你想要它使用的值,如下所示:
printBoard(f, ship1.XPos, ship1.YPos, ship2.XPos, ship2.YPos);
请记住,您还有以下代码行无法正常工作,因为您没有为它所期望的所有参数传递值:
printBoard(f);
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.