Class.getResource and ClassLoader.getResource

I better blog this down before I forget and do another couple of hours of research.

Class.getResource(): 

1. Resolves name you pass to it. If the name has a starting “/”, then it takes it relative from the classpath. means.. “/config/x.txt” == in classpath, config/x.txt should be there

2. If you dont pass a starting “/” then it appends the package name to the file…so, if the name is “config/x.txt” and the class is com.xxx.MyClass, it will look for com/xxx/config/x.txt.

ClassLoader.getResource():

Doesnt do any name resolving. Delegates to parent classloader, if not found, looks in current classloader. 

This is my execution:

C:\workspace\CL\bin>java -cp .;CL-1.0.jar a.B

              

I have a config file called POS.properties in ./config folder.

I tried to read POS.properties in 3 ways.

(i) From main method, 

this.class.getResource(/config/POS.properties);

Will find it. From current path, it exists in config/

this.class.getResource(config/POS.properties);

Cant find it. From current path, Looks for in a/config/POS.properties. 

this.class.getClassLoader().getResource(/config/POS.properties);

Cant find it. 

this.class.getClassLoader().getResource(config/POS.properties);

Will find it.