/* 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
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String s = "Install: C:\\Program Files\\app\nDatabase: postgresql://127.0.0.1:42018/app\nStarted: 2016-12-28 10:40:05.908000\nLines: 1000000\nVersion: 4.1\nPID: 1736";
		Pattern pattern = Pattern.compile("postgresql://[\\d.]+:(\\d+)\\b");
		Matcher matcher = pattern.matcher(s);
		if (matcher.find()){
			System.out.println(matcher.group(1)); 
		} 
	}
}

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