package day01;
import java.util.Scanner;
public class Demo11 {
public static void main(String[] args) {
int[] i0 = new int[10];
String[] i9 = new String[10];
Scanner in = new Scanner(System.in);
while (true) {
System.out.println("请选择\n1.登录\n2.注册\n3.忘记密码?密码找回\n4.退出系统");
int i1 = in.nextInt();
if (i1 == 1) {
A: for (int j = 0; j < i0.length; j++) {
System.out.println("请输入帐号:");
int i2 = in.nextInt();
for (int i = 0; i < i0.length; i++) {
if (i0[i] != i2) {
System.out.println("此帐号未被注册,请您注册后使用" + (i + 1));
continue A;
} else {
System.out.println("帐号正确");
}
}
}
System.out.println("请输入密码:");
String s1 = in.next();
for (int i = 0; i < i9.length; i++) {
if (i9[i] == s1) {
System.out.println("密码正确");
} else {
System.out.println("密码错误,请输入正确的密码,或注册");
}
}
System.out.println("登录成功");
} else if (i1 == 2) {
System.out.println("请输入您要注册的帐号:");
int i2 = in.nextInt();
for (int i = 0; i < i0.length; i++) {
if (i0[i] == 0) {
i0[i] = i2;
}
}
System.out.println("请输入您的密码:");
String s1 = in.next();
for (int i = 0; i < i9.length; i++) {
if (i9[i] == null) {
i9[i] = s1;
}
}
} else if (i1 == 3) {
System.out.println("暂无此功能,后续将会添加,sorry");
} else if (i1 == 4) {
Scanner in1 = new Scanner(System.in);
System.out.println("!提示:由于作者并未学习数据库,所以退出后您的所有信息都不会被保存,请您慎重考虑:退出请按“5”,随意数字回车之后取消本次操作");
int i2 = in1.nextInt();
if (i2 == 5) {
break;
}
}
}
System.out.println("已退出,欢迎下次使用");
}
}
Exception in thread "main" java.util.InputMismatchException
at java.util.Scanner.throwFor(Scanner.java:909)
at java.util.Scanner.next(Scanner.java:1530)
at java.util.Scanner.nextInt(Scanner.java:2160)
at java.util.Scanner.nextInt(Scanner.java:2119)
at day01.Demo11.main(Demo11.java:17)
为什么会报错,哪里错了,请教大神