Java:给你一组字符串如:7i8hy4jjnb2.让你编程输出里面的数字: ihyjjnb.
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String s = "7i8hy4jjnb2";
StringWriter w = new StringWriter();
for(char c : s.toCharArray()){
if(Character.isAlphabetic(c)
w.write(c);
}
String r = w.toString();
System.out.println(r);
