查阅系统代码分享
package librarySearch;public class b1 extends Books { @Override public int num() { // TODO 自动生成的方法存根 return 1; } @Override public String title() { // TODO 自动生成的方法存根 return "红楼梦"; } }
天域知语城
2018-07-02
9 回答
package librarySearch;
import java.util.InputMismatchException;
import java.util.Scanner;
public class Search {
static Books hlm = new b1();
static Books sgyy = new b2();
static Books shz = new b3();
static Books xyj = new b4();
final static Books [] bk= {hlm,sgyy,shz,xyj};
final static String [] bk2 = {"听说英语","精读英语","西方文化通论","大学语文","微积分","计算机程序设计基础","数据结构","线性代数","大学物理","电路分析","数字电路","概率统计"};
public class NoBookException extends Exception{
private static final long serialVersionUID = 1L;
public NoBookException(){
}
public NoBookException(String err){
super(err);
}
}
public static void main (String [] args) throws InputMismatchException,NoBookException{
Search sch= new Search();
Scanner sc = new Scanner(System.in);
outer:
while (true){
try{
System.out.println("请输入你要查找的书库号： 1-四大名著 2-教科书 3-退出");
int i = sc.nextInt();
if (i==1){
System.out.println("请输入你要使用的查找方法： 1-按照名称查找图书 2-按照序号查找图书");
i = sc.nextInt();
if (i==1){
System.out.println("请输入图书名称");
String str = sc.next();
for ( int j = 0 ; j < 4 ; j++ ){
if (bk[j].title().equals(str)){
System.out.println("book:"+bk[j].title());
continue outer;
}
}
throw sch.new NoBookException();
}
else if (i==2){
System.out.println("请输入图书编号");
int num = sc.nextInt();
for ( int j = 0 ; j < 4 ; j++ ){
if (bk[j].num() == num){
System.out.println("book:"+bk[j].title());
continue outer;
}
}
throw sch.new NoBookException();
}
else{
throw new InputMismatchException();
}
}
else{
if (i==2){
System.out.println("请输入你要使用的查找方法： 1-按照名称查找图书 2-按照序号查找图书");
i = sc.nextInt();
if (i==1){
System.out.println("请输入图书名称");
String str = sc.next();
for ( int j = 0 ; j < 12 ; j++ ){
if (bk2[j].equals(str)){
System.out.println("book:"+bk2[j]);
continue outer;
}
}
throw sch.new NoBookException();
}
else if (i==2){
System.out.println("请输入图书编号");
int num = sc.nextInt();
for ( int j = 0 ; j < 12 ; j++ ){
if (j == num-1){
System.out.println("book:"+bk2[j]);
continue outer;
}
}
throw sch.new NoBookException();
}
else{
throw new InputMismatchException();
}
}
else{
if (i==3)
break;
else
throw new InputMismatchException();
}
}
}
catch(NoBookException e){
System.out.println("抱歉，书库中并没有这本书……");
sc.nextLine();
}
catch(InputMismatchException e){
System.out.println("请输入正确的数据！");
sc.nextLine();
}
catch(Exception e){
System.out.println("未知错误！");
sc.nextLine();
}
}
System.out.println("感谢使用本查阅系统，欢迎下次再来！");
sc.close();
}
}《Search.java》
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