import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = "interface GigabitEthernet1\\/(1[2-9]|[1-2][0-1]).*\\n(.*\\n)*.* description \\*\\* Unused Port \\*\\*.*\\n(.*\\n)*.* switchport access vlan 1002.*\\n(.*\\n)*.* switchport mode access.*\\n(.*\\n)*.* switchport port-security.*\\n(.*\\n)*.* switchport port-security mac-address sticky.*\\n(.*\\n)*.* shutdown.*\\n(.*\\n)*.* no cdp enable.*\\n(.*\\n)*.* spanning-tree portfast\n";
final String string = "interface GigabitEthernet1/12\n"
+ " description ** Unused Port **\n"
+ " switchport access vlan 1002\n"
+ " switchport mode access\n"
+ " switchport port-security\n"
+ " switchport port-security mac-address sticky\n"
+ " shutdown\n"
+ " no cdp enable\n"
+ " spanning-tree portfast\n"
+ "!\n"
+ "interface GigabitEthernet1/13\n"
+ " description ** Unused Port **\n"
+ " switchport access vlan 1002\n"
+ " switchport mode access\n"
+ " switchport port-security\n"
+ " switchport port-security mac-address sticky\n"
+ " shutdown\n"
+ " no cdp enable\n"
+ " spanning-tree portfast\n"
+ "!\n";
final String subst = "";
final Pattern pattern = Pattern.compile(regex);
final Matcher matcher = pattern.matcher(string);
// The substituted value will be contained in the result variable
final String result = matcher.replaceFirst(subst);
System.out.println("Substitution result: " + result);
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Java, please visit: https://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html