以下代码可以正常运行
比较不明白的是
因为按字符串查找图书所以定义了String型保存A
如果输入INT型数据则不会报错
此处可如何解决
也希望收到其他可以指正的地方
package com.ExceptionEXE;
import java.util.Scanner;
public class ExceptionEXE {
String books[]={"0位置为空","Chinese","English","Math"};
public static void main(String[] args) throws NoBooksException {
ExceptionEXE e = new ExceptionEXE();
System.out.println("输入1,按书名查询;输入2,按序号查询:");
Scanner D = new Scanner(System.in);
int input = D.nextInt();
switch(input){
case 1:
try {
e.searchName();
} catch (NoBooksException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
break;
case 2:
try {
e.searchNumber();
} catch (NoNumException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
break;
default:
System.out.println("输入错误，输入值只能为1或2");
break;
}
D.close();
}
public void searchName() throws NoBooksException{
System.out.println("按照字符串查找：");
Scanner a = new Scanner(System.in);
String A = a.next();
int count = 0;
for(int i=0;i<books.length;i++){
if(A.equals(books[i])){
// System.out.println("相等");
System.out.println(i+" "+books[i]);
}
count++;
if(count>books.length){
throw new NoBooksException("没有图书");
}
}
}
public void searchNumber()throws NoNumException{
Scanner a = new Scanner(System.in);
System.out.println("按照数字查找：");
int B = a.nextInt();
if(B<1||B>3){
throw new NoNumException("数字超出范围");
}
System.out.println(B+" "+books[B]);
}
}package com.ExceptionEXE;
public class NoBooksException extends Exception{
public NoBooksException(String msg){
super(msg);
}
}package com.ExceptionEXE;
public class NoNumException extends Exception{
public NoNumException(String msg){
super(msg);
}
}
楼主的if(count>books.length){}语句是不会执行的，因为count最大只能是books.length,所以改成我这样试试
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