所以我的代码完全有效;现在唯一的问题是一个我无法弄清楚的非常简单的问题。如果用户键入restart，我必须让程序循环回到开头，我想不出怎么做。
import java.util.Scanner;
public class MutantGerbil {
public static String []foodName;
public static int [] maxAmount;
public static Gerbil [] gerbilAttributes;
public static int [] consumption;
public static void main(String [] args){
Scanner keyboard = new Scanner(System.in);
String userInput1 = keyboard.nextLine();
int food = Integer.parseInt(userInput1);
foodName = new String[food]; //array of food names
maxAmount = new int[food]; // array of max amount of food given everyday
for (int i = 0; i < food; i++){
System.out.println("Name of food item" + (i+1) +": " );
String foodType = keyboard.nextLine();
foodName[i] = foodType;
System.out.println("Maximum consumed per gerbil: ");
String consumption = keyboard.nextLine();
int consumption2 = Integer.parseInt(consumption);
maxAmount [i] = consumption2;
}
System.out.println("How many gerbils are in the lab?");
String userInput2 = keyboard.nextLine();
int numberOfGerbils = Integer.parseInt(userInput2);
gerbilAttributes = new Gerbil [numberOfGerbils];// Array with the gerbil attributes
for (int i = 0; i < numberOfGerbils; i++)
{
consumption = new int[food]; // Array with amount of the food the gerbil eat each day
System.out.println("Gerbil" + (i+1) + "'s" + "lab ID: ");
String gerbilID = keyboard.nextLine();
System.out.println("What name did the students give to "+ gerbilID);
String gerbilName = keyboard.nextLine();
for (int j = 0; j < food; j++)
{
System.out.println(gerbilID + " eats how many " + foodName[j] + " per day?");
String gerbilComsumption = keyboard.nextLine();
int gerbilFood = Integer.parseInt(gerbilComsumption);
if (gerbilFood <= maxAmount[j])
{
consumption[j] = gerbilFood;
}
}
System.out.println("Does " + gerbilID + " bite?");
boolean biter = keyboard.nextBoolean();
System.out.println("Does " + gerbilID + " try to escape?");
boolean flightRisk = keyboard.nextBoolean();
keyboard.nextLine();
Gerbil temp = new Gerbil (gerbilID, gerbilName, consumption, biter, flightRisk);
gerbilAttributes [i] = temp;
}
boolean end1 = false;
while (! end1){
System.out.println("What information would you like to know");
sortGerbilArray (gerbilAttributes);
String userInput3 = keyboard.nextLine();
if (userInput3.equalsIgnoreCase("average"))
{
String average1 = foodAverage();
System.out.println(average1);
}
if (userInput3.equalsIgnoreCase("search"))
{
System.out.println("Enter a Gerbil ID to search for");
userInput3 = keyboard.nextLine();
Gerbil findGerbil = searchForGerbil(userInput3);
if (findGerbil == null)
{
System.out.println("Error");
}
else {
String h = ("Name: " + findGerbil.getName());
if (findGerbil.getAttacker())
{
h+= " (will bite, ";
}
else
{
h+= " (will not bite, ";
}
if (findGerbil.getFilghtRisk())
{
h+= "will run away), ";
}
else
{
h+= "will not run away), ";
}
h+= "Food:";
for (int i = 0; i < foodName.length; i++){
h+=" " + foodName[i] + "-";
h+= findGerbil.getConsumption2()+"/"+ maxAmount[i];
if (i < foodName.length-1)
{
h+=",";
}
System.out.println(h);
}
}
}
if (userInput3.equalsIgnoreCase("restart")){
}
if (userInput3.equalsIgnoreCase("quit"))
{
System.out.println("Good-bye!");
break;
}
}
}
private static void sortGerbilArray(Gerbil[]sortGerbil){
for (int i = 0; i < sortGerbil.length; i++){
for (int j = 0; j < sortGerbil.length - i - 1; j++){
if(sortGerbil[j].getID().compareToIgnoreCase(sortGerbil[j+1].getID())>0){
Gerbil t = sortGerbil[j];
sortGerbil[j] = sortGerbil[j+1];
sortGerbil[j+1] = t;
}
}
}
}
private static String foodAverage()
{
double average = 0.0;
double totalMaxAmount = 0;
double totalConsumption = 0;
String averageFood = "";
for (int i = 0 ; i < gerbilAttributes.length;i++)
{
for(int j = 0; j < maxAmount.length; j++)
{
totalMaxAmount += maxAmount[j];
}
totalConsumption += gerbilAttributes[i].getConsumption();
average = totalConsumption/totalMaxAmount*100;
averageFood += gerbilAttributes[i].getID() + "(" + gerbilAttributes[i].getName() + ")" + Math.round(average) + "%\n";
totalMaxAmount = 0;
totalConsumption = 0;
}
return averageFood;
}
private static Gerbil searchForGerbil (String x) {
for (Gerbil l: gerbilAttributes){
if (l.getID().equals(x)){
return l;
}
}
return null;
}
}
答案 0 :(得分：0)
有两种解决方案。 1.将你的代码包装在＆＃34;同时＆＃34;环。但是你很难，因为你的代码太乱了:(
更改代码如下
import java.util.Scanner;公共类MutantGerbil { public static String [] foodName; public static int [] maxAmount; public static Gerbil [] gerbilAttributes; public static int [] consumption;
public static void main(String [] args){
Scanner keyboard = new Scanner(System.in);
String userInput1 = keyboard.nextLine();
int food = Integer.parseInt(userInput1);
foodName = new String[food]; //array of food names
maxAmount = new int[food]; // array of max amount of food given everyday
for (int i = 0; i < food; i++){
System.out.println("Name of food item" + (i+1) +": " );
String foodType = keyboard.nextLine();
foodName[i] = foodType;
System.out.println("Maximum consumed per gerbil: ");
String consumption = keyboard.nextLine();
int consumption2 = Integer.parseInt(consumption);
maxAmount [i] = consumption2;
}
System.out.println("How many gerbils are in the lab?");
String userInput2 = keyboard.nextLine();
int numberOfGerbils = Integer.parseInt(userInput2);
gerbilAttributes = new Gerbil [numberOfGerbils];// Array with the gerbil attributes
for (int i = 0; i < numberOfGerbils; i++)
{
consumption = new int[food]; // Array with amount of the food the gerbil eat each day
System.out.println("Gerbil" + (i+1) + "'s" + "lab ID: ");
String gerbilID = keyboard.nextLine();
System.out.println("What name did the students give to "+ gerbilID);
String gerbilName = keyboard.nextLine();
for (int j = 0; j < food; j++)
{
System.out.println(gerbilID + " eats how many " + foodName[j] + " per day?");
String gerbilComsumption = keyboard.nextLine();
int gerbilFood = Integer.parseInt(gerbilComsumption);
if (gerbilFood <= maxAmount[j])
{
consumption[j] = gerbilFood;
}
}
System.out.println("Does " + gerbilID + " bite?");
boolean biter = keyboard.nextBoolean();
System.out.println("Does " + gerbilID + " try to escape?");
boolean flightRisk = keyboard.nextBoolean();
keyboard.nextLine();
Gerbil temp = new Gerbil (gerbilID, gerbilName, consumption, biter, flightRisk);
gerbilAttributes [i] = temp;
}
boolean end1 = false;
while (! end1){
System.out.println("What information would you like to know");
sortGerbilArray (gerbilAttributes);
String userInput3 = keyboard.nextLine();
if (userInput3.equalsIgnoreCase("average"))
{
String average1 = foodAverage();
System.out.println(average1);
}
if (userInput3.equalsIgnoreCase("search"))
{
System.out.println("Enter a Gerbil ID to search for");
userInput3 = keyboard.nextLine();
Gerbil findGerbil = searchForGerbil(userInput3);
if (findGerbil == null)
{
System.out.println("Error");
}
else {
String h = ("Name: " + findGerbil.getName());
if (findGerbil.getAttacker())
{
h+= " (will bite, ";
}
else
{
h+= " (will not bite, ";
}
if (findGerbil.getFilghtRisk())
{
h+= "will run away), ";
}
else
{
h+= "will not run away), ";
}
h+= "Food:";
for (int i = 0; i < foodName.length; i++){
h+=" " + foodName[i] + "-";
h+= findGerbil.getConsumption2()+"/"+ maxAmount[i];
if (i < foodName.length-1)
{
h+=",";
}
System.out.println(h);
}
}
}
if (userInput3.equalsIgnoreCase("restart")){
main();
}
if (userInput3.equalsIgnoreCase("quit"))
{
System.out.println("Good-bye!");
break;
}
}
}
private static void sortGerbilArray(Gerbil[]sortGerbil){
for (int i = 0; i < sortGerbil.length; i++){
for (int j = 0; j < sortGerbil.length - i - 1; j++){
if(sortGerbil[j].getID().compareToIgnoreCase(sortGerbil[j+1].getID())>0){
Gerbil t = sortGerbil[j];
sortGerbil[j] = sortGerbil[j+1];
sortGerbil[j+1] = t;
}
}
}
}
private static String foodAverage()
{
double average = 0.0;
double totalMaxAmount = 0;
double totalConsumption = 0;
String averageFood = "";
for (int i = 0 ; i < gerbilAttributes.length;i++)
{
for(int j = 0; j < maxAmount.length; j++)
{
totalMaxAmount += maxAmount[j];
}
totalConsumption += gerbilAttributes[i].getConsumption();
average = totalConsumption/totalMaxAmount*100;
averageFood += gerbilAttributes[i].getID() + "(" + gerbilAttributes[i].getName() + ")" + Math.round(average) + "%\n";
totalMaxAmount = 0;
totalConsumption = 0;
}
return averageFood;
}
private static Gerbil searchForGerbil (String x) {
for (Gerbil l: gerbilAttributes){
if (l.getID().equals(x)){
return l;
}
}
return null;
} }