Sample Program:
public class CheckDigitString {
public static void main(String[] args) {
String str1="abcd";
String str2="abc1d";
String str3="11234567";
//provide regex pattern for digits
System.out.println(" String str1 :"+str1.matches("[0-9]+"));
System.out.println(" String str2 :"+str2.matches("[0-9]+"));
System.out.println(" String str3 :"+str3.matches("[0-9]+"));
}
}
Output:
String str1 :false
String str2 :false
String str3 :true
Enjoy Learning.
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