Based on the following article, I can travel on NodeList of XML document to find the interest child.
Java Code Example groovy.util.NodeList
//String str1 = "IPR031887 Serologically defined colon cancer antigen 8"
String str1 = "LTPOS"
String[] entry = str1.split(" ", 2)
if (entry.size() == 1)
println entry[0]
else {
println entry[0]
println entry[1]
}
String str = "name1, name2, name3, name4";
String[] parts = str.split(", ", 2);
String string1 = parts[0];
String string2 = parts[1];
System.out.println(string1); // prints name1
System.out.println(string2); // prints name2, name3, name4
import java.net.*
import java.io.*
URL oracle = new URL("ftp://ftp.ebi.ac.uk/pub/databases/interpro/entry.list")
BufferedReader br = new BufferedReader(new InputStreamReader(oracle.openStream()))
String inputLine
while ((inputLine = br.readLine()) != null)
inputLine
br.close()