Im a beginner in java and im trying to use an array i've created but it keep not recoginze it. anyone know what could be the thing im missing here ?
to be more specific the command bookArray.length is making this error.
Library(int maxBookCapacity){
Book bookArray[]= new Book[libraryMaxBookCapacity];
}
boolean inLibrary(Book book){
for(int i=0; i<bookArray.length; i++ ){
if (book==bookArray[i]){
return true;
}
}
return false;
}
bookArray is a local variable and spocannot be access outside of the defining method. In fact local means just that: that the name bookArray is only available inside the constructor.
If you need it in inLibrary you should declare is as a field in the enclosing class:
public class Library {
private final Book[] bookArray;
public Library(int maxBookCapacity){
bookArray = new Book[libraryMaxBookCapacity];
}
public boolean inLibrary(Book book){
for(int i = 0; i < bookArray.length; i++ ){
if (book == bookArray[i]){
return true;
}
}
return false;
}
}
By the way, consider if you actually need to compare book objects with the == operator.
// If you declare this within the constructor, it'll be a local variable and nobody can access it.
// Having it here means that inLibrary can see it
private Book[] bookArray;
Library(int maxBookCapacity){
// watch out here, in your code you have a different var from the parameter of the constructor
bookArray= new Book[maxBookCapacity];
}
boolean inLibrary(Book book){
for(int i=0; i<bookArray.length; i++ ){
if (book==bookArray[i]){
return true;
}
}
return false;
}
