Regular expression to accept alphanumeric only
This regular expression refers to a pattern which accepts all lower and upper case characters, and digits only.
Example
package com.w3spoint;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class RegexTest {
private static final String PATTERN = "^[a-zA-Z0-9]+$";
public static void main(String args[]){
List<String> names = new ArrayList<String>();
names.add("Jai");
names.add("Jai12");
names.add("Jai12-");
Pattern pattern = Pattern.compile(PATTERN);
for (String name : names){
Matcher matcher = pattern.matcher(name);
System.out.println(matcher.matches());
}
}
} |
package com.w3spoint; import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern; public class RegexTest {
private static final String PATTERN = "^[a-zA-Z0-9]+$";
public static void main(String args[]){
List<String> names = new ArrayList<String>();
names.add("Jai");
names.add("Jai12");
names.add("Jai12-");
Pattern pattern = Pattern.compile(PATTERN);
for (String name : names){
Matcher matcher = pattern.matcher(name);
System.out.println(matcher.matches());
}
}
}
Output
