package?com.imooc; import?java.util.*; public?class?Return?{ public?static?void?main(String[]?args)?{ //?TODO?Auto-generated?method?stub String[]?book={"數(shù)學(xué)分析","高等代數(shù)","數(shù)理統(tǒng)計(jì)","回歸分析","多元統(tǒng)計(jì)","時(shí)間序列","隨機(jī)過程"}; int[]?num={1,2,3,4,5,6,7}; Return?cw=new?Return(); System.out.println("輸入命令：1-按照名稱查找圖書；2-按照序號(hào)查找圖書"); Scanner?input=new?Scanner(System.in); String?xz; int?xh; while(true) { xz=input.next(); try{ int?pd=Integer.parseInt(xz); if?(pd!=1&&pd!=2){ RuntimeException?a=new?RuntimeException(); throw?a; } //System.out.println("輸入正確了"); break; }catch(RuntimeException?e){ System.out.println("命令輸入錯(cuò)誤！請(qǐng)根據(jù)提示輸入數(shù)字命令"); continue; } } if(xz.equals("1")){ System.out.println("請(qǐng)輸入圖書名稱"); while(true){ String?sm=input.next(); //System.out.println("剛才輸入的是"+sm); try{ for?(int?i=0;i<book.length;i++){ if(sm.equals(book[i])){ System.out.println("find?book:"+book[i]); break; }else? if?(i<6) continue; else?if(i==6) { //cw.zbds(); RuntimeException?e=new?RuntimeException(); throw?e; } } break; }catch(RuntimeException?e){ System.out.println("圖書不存在！請(qǐng)重新輸入"); continue; } } }else?if(xz.equals("2")){ while(true){ System.out.println("請(qǐng)輸入圖書序號(hào)："); try{ xh=input.nextInt(); if(xh>=1&&xh<=7){ System.out.println("find?book:"+book[xh-1]); break; }else?{ RuntimeException?a=new?RuntimeException(); throw?a; } }catch(RuntimeException?a){ System.out.println("命令輸入錯(cuò)誤！請(qǐng)根據(jù)提示輸入數(shù)字命令"); continue; } } } } }