java test if a string is a int
public static boolean isInt(String str) {
try {
@SuppressWarnings("unused")
int x = Integer.parseInt(str);
return true; //String is an Integer
} catch (NumberFormatException e) {
return false; //String is not an Integer
}
}java program to Check given String is contians number or not
public class ContainsExample {
public static void main(String args[]){
String sample = "krishna64";
char[] chars = sample.toCharArray();
StringBuilder sb = new StringBuilder();
for(char c : chars){
if(Character.isDigit(c)){
sb.append(c);
}
}
System.out.println(sb);
}Copyright © 2021 Codeinu
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