如何计算Java字符串中的数字字符？
声明一个整数，将其初始化为0，然后为每个字符递增循环。
示例
public class Sample {
public static void main(String args[]) {
String str = new String("Hi welcome to Nhooo");
int count = 0;
for(int i = 0; i<str.length(); i++) {
count++;
}
System.out.println("Number characters in the given string (including spaces) "+count);
}
}输出结果
Number characters in the given string (including spaces) 28