我想创建一个带有子类的超类，并一次调用我的文本文件，也希望将数据保存在同一arraylist中。我第一本书的代码是
public class LiteraryBook {
public String Li_Title;
public String Li_Author;
public String Li_Isbn;
public String Li_Date;
public String Li_Kind;
public LiteraryBook(String Li_Title, String Li_Author, String Li_Isbn, String Li_Date, String Li_Kind) {
this.Li_Title = Li_Title;
this.Li_Author = Li_Author;
this.Li_Isbn = Li_Isbn;
this.Li_Date = Li_Date;
this.Li_Kind = Li_Kind;
}
public String getLi_Title() {
return Li_Title;
}
public String getLi_Author() {
return Li_Author;
}
public String getLi_Isbn() {
return Li_Isbn;
}
public String getLi_Date() {
return Li_Date;
}
public String getLi_Kind() {
return Li_Kind;
}
@Override
public String toString() {
String s;
s = Li_Title + "\n";
s = s + Li_Author + "\n";
s = s + Li_Isbn + "\n";
s = s + Li_Date + "\n";
s = s + Li_Kind + "\n";
return s;
}
}
我第二本书的代码是
public class ScientificBook {
public String sci_title;
public String sci_author;
public String sci_isbn;
public String sci_date;
public String sci_kind;
public String sci_field;
public ScientificBook(String sci_title, String sci_author, String sci_isbn, String sci_date, String sci_kind, String sci_field) {
this.sci_title = sci_title;
this.sci_author = sci_author;
this.sci_isbn = sci_isbn;
this.sci_date = sci_date;
this.sci_kind = sci_kind;
this.sci_field = sci_field;
}
public String getSci_Title() {
return sci_title;
}
public String getSci_Author() {
return sci_author;
}
public String getSci_Isbn() {
return sci_isbn;
}
public String getSci_Date() {
return sci_date;
}
public String getSci_Kind() {
return sci_kind;
}
public String getSci_field() {
return sci_field;
}
@Override
public String toString() {
String s;
s = sci_title + "\n";
s = s + sci_author + "\n";
s = s + sci_isbn + "\n";
s = s + sci_date + "\n";
s = s + sci_kind + "\n";
s = s + sci_field + "\n";
return s;
}
}
在下面的代码中，我为第一本书创建一个数组列表，并将数据写入文本文件
public class LiteraryBookList {
private ArrayList<LiteraryBook> LibookList;
public LiteraryBookList() {
LibookList = new ArrayList<LiteraryBook>();
}
public void add_li(LiteraryBook lb) {
LibookList.add(lb);
}
public ArrayList<LiteraryBook> getLiBooks() {
return LibookList;
}
public void readFromTxtLi(String filename) {
File file = new File(filename);
FileReader reader = null;
try {
reader = new FileReader(file);
} catch (FileNotFoundException e) {
System.exit(1);
}
BufferedReader infile = new BufferedReader(reader);
String line = "";
int counter = 0;
String Li_Title = "";
String Li_Author = "";
String Li_Isbn = "";
String Li_Date = "";
String Li_Kind = "";
String Li_field = "";
try {
while ((line = infile.readLine()) != null) {
if(line.isEmpty() || line.contains("ΛΟΓΟΤΕΧΝΙΚΟ"))
continue;
counter++;
if (counter == 1) {
Li_Title = line;
} else if (counter == 2) {
Li_Author = line;
} else if (counter == 3) {
Li_Isbn = line;
} else if (counter == 4) {
Li_Date = line;
} else if (counter == 5) {
Li_Kind = line;
LiteraryBook lb = new LiteraryBook(Li_Title, Li_Author, Li_Isbn, Li_Date, Li_Kind);
LibookList.add(lb);
counter = 0;
}
}
} catch (IOException ex) {
Logger.getLogger(LiteraryBookList.class.getName()).log(Level.SEVERE, null, ex);
}
}
public Object[][] convert2Data() {
Object[][] data = new Object[LibookList.size()][5];
for (int i = 0; i < LibookList.size(); i++) {
data[i][0] = LibookList.get(i).getLi_Title();
data[i][1] = LibookList.get(i).getLi_Author();
data[i][2] = LibookList.get(i).getLi_Isbn();
data[i][3] = LibookList.get(i).getLi_Date();
data[i][4] = LibookList.get(i).getLi_Kind();
}
return data;
}
}
也用于第二本书 公共类ScientificBookList {
private ArrayList<ScientificBook> ScibookList;
public ScientificBookList() {
ScibookList = new ArrayList<ScientificBook>();
}
public void add_sci(ScientificBook sb) {
ScibookList.add(sb);
}
public ArrayList<ScientificBook> getSciBooks() {
return ScibookList;
}
public void readFromTxtSci(String filename) {
File file = new File(filename);
FileReader reader = null;
try {
reader = new FileReader(file);
} catch (FileNotFoundException e) {
System.exit(1);
}
BufferedReader infile = new BufferedReader(reader);
String line = "";
int counter = 0;
String Sci_Title = "";
String Sci_Author = "";
String Sci_Isbn = "";
String Sci_Date = "";
String Sci_Kind = "";
String Sci_field = "";
try {
while ((line = infile.readLine()) != null) {
if (line.isEmpty() || line.contains("ΕΠΙΣΤΗΜΟΝΙΚΟ")) {
continue;
}
counter++;
if (counter == 1) {
Sci_Title = line;
} else if (counter == 2) {
Sci_Author = line;
} else if (counter == 3) {
Sci_Isbn = line;
} else if (counter == 4) {
Sci_Date = line;
} else if (counter == 5) {
Sci_Kind = line;
} else if (counter == 6) {
Sci_field = line;
ScientificBook sb = new ScientificBook(Sci_Title, Sci_Author, Sci_Isbn, Sci_Date, Sci_Kind, Sci_field);
ScibookList.add(sb);
counter = 0;
}
}
} catch (IOException ex) {
Logger.getLogger(LiteraryBookList.class.getName()).log(Level.SEVERE, null, ex);
}
}
public Object[][] convert2Data() {
Object[][] data = new Object[ScibookList.size()][6];
for (int i = 0; i < ScibookList.size(); i++) {
data[i][0] = ScibookList.get(i).getSci_Title();
data[i][1] = ScibookList.get(i).getSci_Author();
data[i][2] = ScibookList.get(i).getSci_Isbn();
data[i][3] = ScibookList.get(i).getSci_Date();
data[i][4] = ScibookList.get(i).getSci_Kind();
data[i][5] = ScibookList.get(i).getSci_field();
}
return data;
}
}
我认为您应该考虑采用特定的设计模式，这将使您的代码易于维护。
查看代码后，我觉得您应该尝试使用工厂方法模式和/或策略模式。