使用no arg构造函数添加到数组

Question

我似乎被困在如何使用no-arg构造函数添加到数组中。我在这里失踪的是什么？

public class Book {
private String title;
private String author;
private int pages;
private double price;
public static int numBooks = 0;


public Book(String title, String author, int pages, double price) {
    super();
    this.title = title;
    this.author = author;
    this.pages = pages;
    this.price = price;
    numBooks++;
}
public Book() {
    super();
    numBooks++;
}

public String getTitle() {
    return title;
}

public void setTitle(String title) {
    this.title = title;
}

public String getAuthor() {
    return author;
}

public void setAuthor(String author) {
    this.author = author;
}

public int getPages() {
    return pages;
}

public void setPages(int pages) {
    this.pages = pages;
}

public double getPrice() {
    return price;
}

public void setPrice(double price) {
    this.price = price;
}

@Override
public String toString() {
    return "book [title=" + title + ", author=" + author + ", pages=" + pages + ", price=" + price + "]";
}

public static int getNumBooks(){ 
    return numBooks;
}

这是我遇到很多麻烦的地方。我有我的主要和它下面我有我的无arg构造函数，我无法弄清楚如何在main中添加数组。任何正确方向的建议或指示都会很棒。

}

public class TestBook {
private String title;
private String author;
private int pages;
private double price;

public TestBook(String title, String author, int pages, double price){
    this.title = title;
    this.author = author;
    this.pages = pages;
    this.price = price;
}

public static void main(String[] args) {

    Book[] bookArray = new Book[6]; //This is the array that I am trying to add the last two books too 

    Book bookArray0 = new Book("Java Proramming", "Liang", 1320, 145.00);
    Book bookArray1 = new Book("Horton Hears a Who", "Dr. Seuss", 72, 19.99);
    Book bookArray2 = new Book("The Hobbit", "Tolkien", 320, 9.25);
    Book bookArray3 = new Book("Born a Crime", "Noah", 304, 17.33);
    Book bookArray4 = new Book();
    Book bookArray5 = new Book();

    bookArray[0] = bookArray0;
    bookArray[1] = bookArray1;
    bookArray[2] = bookArray2;
    bookArray[3] = bookArray3;
    bookArray[4] = bookArray4;
    bookArray[5] = bookArray5;


    for(Book d : bookArray)
        System.out.println(d);


}

public TestBook() { //This is the no-arg that I am trying to use to add to the array above.
    Book[] bookArray = new Book[6];
    Book bookArray4 = new Book("The Town", "Chuck Hogan", 477, 14.99);
    Book bookArray5 = new Book("The Pretender ", "Sombody", 400, 24.99);
    bookArray[4] = bookArray4;
    bookArray[5] = bookArray5;

    for(Book b : bookArray)
        System.out.println(b);

    }

public void finishArray(){
Book lastBook = new Book();
lastBook.setTitle(title);
lastBook.setAuthor(author);
lastBook.setPages(pages);
lastBook.setPrice(price);

}

}