标签：shu int str1 System 类似 算法 str parseInt out
Scanner sc = new Scanner(System.in);
String str = "";
while(true){
System.out.println("请输入");
String str1 = sc.nextLine();
if(str1.length() < 1 || str1.length() > 10 || str1.charAt(0) == '0') {
System.out.println("格式有误");
continue;
}
str = str1;
break;
}
int shu = 0;
for (int i = 0; i < str.length(); i++) {
int ge = str.charAt(i) - 48;
shu = shu * 10 + ge;
}
System.out.println(shu);
标签：shu,
int,
str1,
System,
类似,
算法,
str,
parseInt,
out
From： https://www.cnblogs.com/liuxuefeng/p/17724255.html