/* package whatever; // don't place package name! */
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.*;
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
{
String regexp
= "(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)"; String goodIp
= "192.168.0.3"; String badIp
= "192.168.0.3g"; Pattern pattern = Pattern.compile(regexp);
Matcher matcher = pattern.matcher(goodIp);
if (matcher.find())
{
teg1 = matcher.group();
}
matcher = pattern.matcher(badIp);
if (matcher.find())
{
teg2 = matcher.group();
}
}
}
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