package?com.test.trycatch;
import?java.util.*;

public?class?TryTest?{
????
????static?Scanner?sin?=?new?Scanner(System.in);
????static?BookFindTry[]?books?=?{new?storyBook(1,"西游記"),new?storyBook(2,"紅樓夢"),new?storyBook(4,"水滸傳"),new?juvenileBook(49,"三體")};
????
????public?static?void?main(String[]?args)?{
????????try?{
????????????try?{
????????????????TryTest.show();
????????????}?catch?(InputMismatchException?e)?{
????????????????/*e.printStackTrace();*/
????????????????System.out.println("命令輸入錯誤！請根據提示輸入數字命令！");
????????????????TryTest.show();
????????????}
????????}?catch?(Exception?e)?{
????????????????e.printStackTrace();
????????????????System.out.println("抱歉，您查詢的圖書不存在！或已被其它同學借走！");
????????????????TryTest.show();
????????}

????}
????
????private?static?void?show()?{
????????System.out.println("輸入命令查找圖書：1-按照名稱查找圖書；2-按照序號查找圖書");
????????int?intput?=?sin.nextInt();
????????if(intput==1){
????????????System.out.println("請輸入書名：");
????????????String?iputbookname?=?sin.next();
????????????for(int?i=0;i<books.length;i++){
????????????????if(iputbookname.equals(books[i].bookName)){
????????????????????System.out.println("恭喜您借書《"+books[i].bookName+"》成功！"?);
????????????????}else?{
????????????????}????
????????????}
????????}else?if?(intput==2)?{
????????????System.out.println("請輸入序號：");
????????????int?iputbookid?=?sin.nextInt();
????????????for(int?i=0;i<books.length;i++){
????????????????if(iputbookid==books[i].bookId){
????????????????????System.out.println("恭喜您借書《"+books[i].bookName
????????????????????????????+"》成功！"?);
????????????????}else?{
????????????????}????
????????????}
????????}
????}
}

這是正確運行程序的結果圖，其中每次的輸入指令處都有一個try…catch判斷是否輸入正確，不正確澤返回上一步驟，重新輸入。