交作業（圖書查詢）
public class Initial {
public static void main(String[] args) {
String[] library = {"xml","ssm","數據結構與算法"};
int n = 0;
while (true) {
try {
Scanner scanner = new Scanner(System.in);
String tipString = "圖書不存在！";
System.out.println("輸入命令：1-按書名查找 2-按編號查找");
n = scanner.nextInt();
if (n==1) {
try {
System.out.println("請輸入書名：");
String name = scanner.next();
for (int i = 0; i < library.length; i++) {
if (name.equals(library[i])) {
tipString = "book:"+name;
break;
}
}
} catch (Exception e) {
continue;
} finally {
System.out.println(tipString);
}
}else if (n==2) {
System.out.println("請輸入編號：");
try {
int num = scanner.nextInt();
tipString = "book:"+library[num];
System.out.println(tipString);
}catch (Exception e) {
System.out.println("請輸入數值");
continue;
}?
}
} catch (Exception e) {
System.out.println("根據提示輸入正確命令！");
continue;
}?
}
}
}
2019-01-12
當系統要求"輸入命令：1-按書名查找 2-按編號查找"的時候
輸入3 不會提示""根據提示輸入正確命令！"
在輸入編號時 若輸入字符,會直接退回命令選擇而不是讓我重新輸入編號