Java程序检查输入的字符是否为ASCII 7位数字和字符
要检查输入的值是否为ASCII7位数字和字符（字母数字），请检查以下字符的ASCII值：
A to Z Or a to z Or 0 to 9
在这里，我们有以下值-
char one = '5';
现在，我们使用if-else检查了ASCII7位数字和字符的一些条件。
if ((one >= 'A' && one <= 'Z') || (one >= 'a' && one <= 'z') || (one >= '0' && one <= '9')) {
System.out.println("Given value is numeric and character (alphanumeric)!");
} else {
System.out.println("给定的值不是数字和字符！");
}示例
public class Demo {
public static void main(String []args) {
char one = '5';
if ((one >= 'A' && one <= 'Z') || (one >= 'a' && one <= 'z') || (one >= '0' && one <= '9')) {
System.out.println("Given value is numeric and character (alphanumeric)!");
} else {
System.out.println("给定的值不是数字和字符！");
}
}
}输出结果
Given value is numeric and character (alphanumeric)!
让我们看另一个例子-
示例
public class Demo {
public static void main(String []args) {
char one = 'V';
if ((one >= 'A' && one <= 'Z') || (one >= 'a' && one <= 'z') || (one >= '0' && one <= '9')) {
System.out.println("Given value is numeric and character (alphanumeric)!");
} else {
System.out.println("给定的值不是数字和字符！");
}
}
}输出结果
Given value is numeric and character (alphanumeric)!