当我在代码中的某些位置遇到以下错误时，我正在编写程序：
第一个错误是：“构造函数Gerbil（String，String，int []，boolean，boolean，String []）未定义”，代码如下：gerbil [i] = new Gerbil（n5，n6，amountfood） ，逃避[i]，咬[i]，食物）;
第二个错误是：“方法getTypeFood（）未定义类型Gerbil”，代码如下：String [] food = g.getTypeFood（）;
这是我的整个程序代码（2个不同的类）
第一堂课：
import java.util.Scanner;
public class Gerbilfood {
static int n8;
static int n3;
static String n55;
static String n35;
static String n2;
public static Gerbil[] gerbil;
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.println("Please input how many types of food items the gerbils eat as an integer");
String n0 = scanner.nextLine();
int n1 = Integer.parseInt(n0);
String[] food = new String[n1];
for (int i = 0; i < n1; i++) {
System.out.println("Please enter a food name");
String n2 = scanner.nextLine();
food[i] = n2;
int[] maximum = new int[n1];
System.out.println("Please enter maximum amount of this food per day");
String n33 = scanner.nextLine();
int n3 = Integer.parseInt(n33);
maximum[i] = n3;
}
System.out.println("Please enter in the number of gerbils in the lab");
String n73 = scanner.nextLine();
int n4 = Integer.parseInt(n73);
//gerbil = new Gerbil[n4];
gerbil = new Gerbil[n4];
int[] combo = new int[n4];
String[] ids = new String[n4];
for (int i = 0; i < n4; i++) {
//Gerbil g = new Gerbil(n1);
System.out.println("Please enter in the lab id for one of the gerbils");
String n5 = scanner.nextLine();
//g.setId(n5);
//ids[i] = n5;
//String[] names = new String[n4];
System.out.println("Please enter in the name given to gerbil whose lab id you just entered");
String n6 = scanner.nextLine(); // gerbil name
//g.setName(n6);
//String[] amountfood = new String[n1];
int [] amountfood = new int[n1];
for (int j = 0; j < n1; j++) {
System.out.println("how much of " +food[j]
+ " did this gerbil eat");
String n8 = scanner.nextLine();
//amountfood[j = n8;
amountfood[j] = Integer.parseInt(n8);
}
boolean[] bite = new boolean[n4];
System.out
.println("Does this Gerbil bite? Enter True or False");
String n77 = scanner.nextLine();
if (n77.equalsIgnoreCase("True"))
bite[i] = true;
else{
bite[i] = false;
}
boolean[]escape = new boolean[n4];
System.out
.println("Does this Gerbil escape? Enter True or False");
String n89 = scanner.nextLine();
if (n89.equalsIgnoreCase("True"))
escape[i] = true;
else{
escape[i] = false;
}
gerbil[i] = new Gerbil(n5,n6,amountfood, escape[i], bite[i],food);
}
System.out.println("What information would you like to know?");
String n55 = scanner.nextLine();
String n33 = "search";
String n34 = "average";
String n35 = "restart";
String n36 = "quit";
if(n55.equalsIgnoreCase(n34)){
System.out.println( averagefood());
}
else{
if(n55.equalsIgnoreCase(n33)){
System.out.println("Please type the lab id of the gerbil you wish to search for");
String n87 = scanner.nextLine();
Gerbil g = searchForGerbil(n87);
Gerbil gerbilattributes=searchForGerbil(n87);
String gerbid = g.getId();
String gerbname = g.getName();
boolean gerbbite = g.getBite();
boolean gerbescape = g.getEscape();
for (int i = 0; i<n1; i++)
String[]food = g.getTypeFood();
int[] gerbfoods = g.getAmountFood();
for(int i = 0; i < n1; i++)
System.out.println(gerbid +" bite = "+ gerbbite + " " + gerbname + "escape = " + gerbescape + " " + gerbfoods);
}
else{
if (n55.equalsIgnoreCase(n35)){
//GO BACK
}
else{
if (n55.equalsIgnoreCase(n36)){
System.exit(0);
}
else{
System.out.println("ERROR");
}
}
}
}
}
public static String averagefood() {
int i = 0;
Gerbil g = gerbil[i];
String gid = g.getId();
String gname = g.getName();
long percent = Math.round(n8 * 100.0 / n3);
String everything = gid + " " + gname + " " + percent + "\n";
for ( i = 0; i <=gerbil.length; i++) {
//turn everything;
}
return everything;
}
public static Gerbil searchForGerbil(String n87) {
for(int i = 0; i< gerbil.length; i++){
Gerbil g = gerbil[i];
if(n87.equals(g.getId())){
return gerbil[i];
}
// return (new Gerbil[i]);
} return null;
}
}
second class:
public class Gerbil {
private String id;
private String name;
private int[] amountfood;
private int numbergerbils;
private String[] food;
private boolean escape;
private boolean bite;
public Gerbil(String n5, String n6, int[]numOfFood, boolean newEscape, boolean newBite, String[] n2) {
id = n5;
name = n6;
amountfood = numOfFood;
escape = newEscape;
bite = newBite;
food = n2;
}
public Gerbil(String[] typefood){
food = typefood;
}
public Gerbil(int [] numOfFood) {
amountfood = numOfFood;
}
public int[] getAmountFood(){
return amountfood;
}
public boolean getBite(){
return bite;
}
public boolean getEscape(){
return escape;
}
public String getId() {
return id;
}
public String getName() {
return name;
}
public void setId(String newId) {
id = newId;
}
public void setName(String newName) {
name = newName;
}
public String [] getTypeFood(){
return food;
return null;
}
}
请输入沙土鼠吃多少种食物
2
请输入食物名称
面包
请每天输入此食物的最高金额
5
请输入食物名称
大蒜
请每天输入此食物的最高金额
6
请输入实验室中的沙鼠数量
2
请输入其中一只沙鼠的实验室ID
hgklll
请输入您刚刚输入实验室ID的沙鼠名称
拉里
这种沙鼠吃了多少面包
1
这种沙鼠吃了多少大蒜
1
这只沙鼠咬伤了吗？输入True或False
假
这只沙鼠逃脱了吗？输入True或False
真
请输入其中一只沙鼠的实验室ID
hjdddd
请输入您刚刚输入实验室ID的沙鼠名称
戴夫
这种沙鼠吃了多少面包
1
这种沙鼠吃了多少大蒜
1
这只沙鼠咬伤了吗？输入True或False
假
这只沙鼠逃脱了吗？输入True或False
真
您想知道哪些信息？
搜索
请输入您要搜索的沙鼠的实验室ID
hjdddd hjdddd bite = false daveescape = true [I @ 629e5e21 hjdddd bite = false daveescape = true [I @ 629e5e21
对于最后一部分（请输入您要搜索的实验室ID），我试图让它返回字符串中的食物名称和数量。示例：姓名：Big Bertha（将逃脱，不会咬人），食物：红色药丸 - 25/50，蓝色药丸 - 50/100
答案 0 :(得分：0)
假设您在两个单独的，适当命名的文件中有两个类，这里有两个问题：
在Gerbilfood，您尝试重新定义可变食物的main方法：
String[] food = new String[n1];
...
String[]food = g.getTypeFood();
在Gerbil中，您的getTypeFood方法有两个返回值：
public String [] getTypeFood(){
return food;
return null;
}
首先解决这两个问题。
答案 1 :(得分：0)
乍一看下面的方法是错误的，因此Gerbil类不会编译。
public String [] getTypeFood(){
return food;
return null;
}
删除其中一个return语句。
public String [] getTypeFood(){
return food;
}
完整代码：
public class Gerbil {
private String id;
private String name;
private int[] amountfood;
private int numbergerbils;
private String[] food;
private boolean escape;
private boolean bite;
public Gerbil(String n5, String n6, int[] numOfFood, boolean newEscape, boolean newBite, String[] n2) {
id = n5;
name = n6;
amountfood = numOfFood;
escape = newEscape;
bite = newBite;
food = n2;
}
public Gerbil(String[] typefood) {
food = typefood;
}
public Gerbil(int[] numOfFood) {
amountfood = numOfFood;
}
public int[] getAmountFood() {
return amountfood;
}
public boolean getBite() {
return bite;
}
public boolean getEscape() {
return escape;
}
public String getId() {
return id;
}
public String getName() {
return name;
}
public void setId(String newId) {
id = newId;
}
public void setName(String newName) {
name = newName;
}
public String[] getTypeFood() {
return food;
}
}
import java.util.Scanner;
public class Gerbilfood {
static int n8;
static int n3;
static String n55;
static String n35;
static String n2;
public static Gerbil[] gerbil;
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.println("Please input how many types of food items the gerbils eat as an integer");
String n0 = scanner.nextLine();
int n1 = Integer.parseInt(n0);
String[] food = new String[n1];
for (int i = 0; i < n1; i++) {
System.out.println("Please enter a food name");
String n2 = scanner.nextLine();
food[i] = n2;
int[] maximum = new int[n1];
System.out.println("Please enter maximum amount of this food per day");
String n33 = scanner.nextLine();
int n3 = Integer.parseInt(n33);
maximum[i] = n3;
}
System.out.println("Please enter in the number of gerbils in the lab");
String n73 = scanner.nextLine();
int n4 = Integer.parseInt(n73);
//gerbil = new Gerbil[n4];
gerbil = new Gerbil[n4];
int[] combo = new int[n4];
String[] ids = new String[n4];
for (int i = 0; i < n4; i++) {
//Gerbil g = new Gerbil(n1);
System.out.println("Please enter in the lab id for one of the gerbils");
String n5 = scanner.nextLine();
//g.setId(n5);
//ids[i] = n5;
//String[] names = new String[n4];
System.out.println("Please enter in the name given to gerbil whose lab id you just entered");
String n6 = scanner.nextLine(); // gerbil name
//g.setName(n6);
//String[] amountfood = new String[n1];
int[] amountfood = new int[n1];
for (int j = 0; j < n1; j++) {
System.out.println("how much of " + food[j]
+ " did this gerbil eat");
String n8 = scanner.nextLine();
//amountfood[j = n8;
amountfood[j] = Integer.parseInt(n8);
}
boolean[] bite = new boolean[n4];
System.out
.println("Does this Gerbil bite? Enter True or False");
String n77 = scanner.nextLine();
if (n77.equalsIgnoreCase("True")) {
bite[i] = true;
} else {
bite[i] = false;
}
boolean[] escape = new boolean[n4];
System.out
.println("Does this Gerbil escape? Enter True or False");
String n89 = scanner.nextLine();
if (n89.equalsIgnoreCase("True")) {
escape[i] = true;
} else {
escape[i] = false;
}
gerbil[i] = new Gerbil(n5, n6, amountfood, escape[i], bite[i], food);
}
System.out.println("What information would you like to know?");
String n55 = scanner.nextLine();
String n33 = "search";
String n34 = "average";
String n35 = "restart";
String n36 = "quit";
if (n55.equalsIgnoreCase(n34)) {
System.out.println(averagefood());
} else {
if (n55.equalsIgnoreCase(n33)) {
System.out.println("Please type the lab id of the gerbil you wish to search for");
String n87 = scanner.nextLine();
Gerbil g = searchForGerbil(n87);
Gerbil gerbilattributes = searchForGerbil(n87);
String gerbid = g.getId();
String gerbname = g.getName();
boolean gerbbite = g.getBite();
boolean gerbescape = g.getEscape();
for (int i = 0; i < n1; i++) {
food = g.getTypeFood();
}
int[] gerbfoods = g.getAmountFood();
System.out.print("Lab :"+gerbid + " Name:"+ gerbname + " ("+ ((gerbbite==true)?"will bite":"will not bite") + "," + ((gerbescape==true)?"will escape":"will not escape") + ")");
for (int i = 0; i < n1; i++) {
System.out.print( " " + food[i] + ":"+ gerbfoods[i]);
}
} else {
if (n55.equalsIgnoreCase(n35)) {
//GO BACK
} else {
if (n55.equalsIgnoreCase(n36)) {
System.exit(0);
} else {
System.out.println("ERROR");
}
}
}
}
}
public static String averagefood() {
int i = 0;
Gerbil g = gerbil[i];
String gid = g.getId();
String gname = g.getName();
long percent = Math.round(n8 * 100.0 / n3);
String everything = gid + " " + gname + " " + percent + "\n";
for (i = 0; i <= gerbil.length; i++) {
//turn everything;
}
return everything;
}
public static Gerbil searchForGerbil(String n87) {
for (int i = 0; i < gerbil.length; i++) {
Gerbil g = gerbil[i];
if (n87.equals(g.getId())) {
return gerbil[i];
}
// return (new Gerbil[i]);
}
return null;
}
}