[英]JAVA seperate class method not incrementing a variable in my main class method
[英](Beginner Java) Main method refers to a method in a seperate class which holds arrays. How would the method in the second class be set up?
我的主要方法有:数组
String[] numbers = {"1", "2", "3", "4", "5", "6", "7"};
String[] brands= {"aa", "bb", "cc", "dd", "ee", "ff", "gg"};
String[] types= {"hh", "ii", "jj", "kk", "ll", "mm", "nn"};
对我的第二种方法的引用(在与类名Soda相同的包中)
Soda[] list = new Soda[numbers.length];
list = listOfSodaCans(numbers,brands,types);
我知道我的Soda类中的listOfSodaCans方法必须以(java.lang.String[],java.lang.String[],java.lang.String[])
的形式接收参数,但是我似乎无法进行设置。 我反复得到一个找不到符号。 有人对listOfSodaCans方法的一般结构有什么建议吗?
谢谢!
@ Alice-我的汽水方法:
public class Soda {
private Soda[] listOfSodaCans;
public Soda[] getListOfSodaCans() {
return listOfSodaCans;
}
public void setListOfSodaCans(Soda[] listOfSodaCans) {
this.listOfSodaCans= listOfSodaCans;
}
public static Soda[] listOfSodaCans(String[] numbers, String[] brands,
String[] types) {
// more code
return null;
}
}
这是可行的。 我使用“ main”类(所以只有一个)来简化代码,但是应该相同。
import java.io.Console;
public class Main {
public static void main(String[] args) {
// TODO Auto-generated method stub
String[] numbers = {"1", "2", "3", "4", "5", "6", "7"};
String[] brands= {"aa", "bb", "cc", "dd", "ee", "ff", "gg"};
String[] types= {"hh", "ii", "jj", "kk", "ll", "mm", "nn"};
Main m = new Main();
m.listOfSodaCans(numbers, brands, types);
}
public void listOfSodaCans(String[] numbers, String[] brands, String[] types) {
System.out.println(numbers.length);
}
}
苏打水类
public class Soda {
public static Soda[] listOfSodaCans(String[] numbers, String[] brands,
String[] types) {
// more code
return null;
}
}
主班会这样
public static void main(String[] args) {
String[] numbers = { "1", "2", "3", "4", "5", "6", "7" };
String[] brands = { "aa", "bb", "cc", "dd", "ee", "ff", "gg" };
String[] types = { "hh", "ii", "jj", "kk", "ll", "mm", "nn" };
Soda[] list = new Soda[numbers.length];
list = Soda.listOfSodaCans(numbers, brands, types);
// way 2, accessing by instance
// Soda soda = new Soda();
// list = soda.listOfSodaCans(numbers, brands, types);
}
如果使用方法2,则最好从listOfSodaCans()
删除static
listOfSodaCans()
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