how can i change the Read Only mode in some classes to read and write in java? : i have a jar file with classes in it attached to my project but i cant instanciate object from those classes because the constructors are private and i cant change that because those files are in read only mode 
can someone help me in java  ?  


[ `private DicomImageViewer(String title,int w,int h) { 
	} 

	/**
	 * @param	title
	 */
	private DicomImageViewer(String title) {
	} `][1]


  [1]: https://i.stack.imgur.com/usxk1.png