Collections Java Tutorial

public String getProperty(String key)
public String getProperty(String key, String defaultValue)
If the key is not found and no default value is provided, null is returned.

import java.io.FileInputStream;
import java.util.Properties;
public class Load {
  public static void main (String args[]) throws Exception {
    Properties p = new Properties();
    p.load(new FileInputStream("colon.txt"));
    p.getProperty("foo");
  }
}
//bar
//File: test.txt
/*
foo:bar
one
two
three=four
five  six seven eight
nine ten
*/