How to read data from a configuration file in Java

1. First create a package (e.g. : config) in the project, then create a configuration file (e.g. : a.perties), add the configuration information as follows:
Such as:

name=kaka
age=28

2. Code:

import java.io.IOException; 
import java.io.InputStream; 
import java.util.Properties; 
public class PropertyTest {
 public static void main(String[] args) { 
  PropertyTest loadProp = new PropertyTest(); 
  InputStream in = loadProp.getClass().getResourceAsStream("/config/a.properties"); 
  Properties prop = new Properties(); 
  try {
   prop.load(in); 
  } catch (IOException e) { 
   e.printStackTrace(); 
  } 
  System.out.println(prop.getProperty("name")); 
  System.out.println(prop.getProperty("age"));
 } 
}