public class ExtractNumFromString {
public static void main(String[] args) {
String s="vi5j7ay";
String s1="";
char[] c=s.toCharArray();
for(int i=0;i<c.length;i++) {
if(c[i] <97 || c[i]>122) {
System.out.println(c[i]);
}
}
}
}
Output:
5
7
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