//感覺不太好，為什么try...catch沒啥作用勒。麻煩幫我看看
package com.Home;
import java.util.Scanner;
public class rentForBook {
public static void main(String args[]){
rentForBook Rent = new rentForBook();
Rent.waysOfRent();
}
public String[] typesOfRent(){
String[] bookTypes = {"高數","數據結構"};
return bookTypes;
}
public void waysOfRent(){
System.out.println("輸入命令：1-按照名稱查找圖書；2-按照序號查找圖書");
Scanner Input = new Scanner(System.in);
int way = Input.nextInt();
try{if(way == 1){
BasedOnName();
}
if(way == 2){
BasedOnNums();
}
else{
System.out.println("輸入錯誤！請重新輸入");
}
}catch(Exception e){
System.out.println("輸入錯誤！請重新輸入！");
}
}
public void BasedOnName(){
System.out.println("請輸入圖書名稱：");
Scanner Input1 = new Scanner(System.in);
String name = Input1.next();
String bookTypes[] = typesOfRent();
rentForBook ifsure = new rentForBook();
try{
if(name.equals(bookTypes[0])){
ifsure.AdvancedMath();
}
if(name.equals(bookTypes[1])){
ifsure.DataConstructure();
}
else{
System.out.println("輸入錯誤！請重新輸入！");
}
}catch(Exception e){
e.printStackTrace();
System.out.println("輸入錯誤！請重新輸入！");
}
BasedOnName();
}
public void BasedOnNums(){
System.out.println("請輸入圖書序號：");
Scanner Input2 = new Scanner(System.in);
int nums = Input2.nextInt();
rentForBook ifsure = new rentForBook();
try{
if(nums == 1){
ifsure.AdvancedMath();
}
if(nums == 2){
ifsure.DataConstructure();
}
if(nums > 2){
System.out.println("輸入錯誤！請重新輸入！");
}
}catch(Exception e){
e.printStackTrace();
System.out.println("輸入錯誤！請重新輸入！");
}
BasedOnNums();
}
public void AdvancedMath(){
System.out.println("book : 高數");
System.out.println("確認請按 1！");
Scanner Input = new Scanner(System.in);
int num = Input.nextInt();
try{if(num == 1)
System.out.println("您已成功租借高數！");
}catch(Exception e){
e.printStackTrace();
System.out.println("輸入不正確，請重新輸入！");
}
}
public void DataConstructure(){
System.out.println("book : 數據結構");
System.out.println("確認請按 1！");
Scanner Input = new Scanner(System.in);
int num = Input.nextInt();
try{if(num == 1)
System.out.println("您已成功租借數據結構！");
}catch(Exception e){
e.printStackTrace();
System.out.println("輸入不正確，請重新輸入！");
}
}
}
2014-10-01
再者
public?void?DataConstructure(){ System.out.println("book?:?數據結構"); System.out.println("確認請按?1！"); Scanner?Input?=?new?Scanner(System.in); int?num?=?Input.nextInt(); try{if(num?==?1) System.out.println("您已成功租借數據結構！"); }catch(Exception?e){ e.printStackTrace(); System.out.println("輸入不正確，請重新輸入！"); //運行到這自動就會跳出系統此步驟，闊儀加一句,goodLuck DataConstructure(); } } }2014-10-01
親，try-catch應該把scanner輸入語句也加進去，否則監控不到輸入的
Scanner?Input?=?new?Scanner(System.in); try{ ????int?way?=?Input.nextInt(); ????…… }catch(){ ????…… }2014-09-23
你應該在cath中重新調用方法，而不是把異常打印出來，你再試試