Tharindu Wijewardane tharinduwijewardane

Code sample	Java meaning	C++ meaning
X x;	Declares the variable x of class X. This does not creates an object	Creates the object x of class X (on stack)
X x = new X();	Declares variable x and creates and assigns an object	Invalid syntax
X* x;	Invalid syntax	Declares a pointer of type X. Same as declaring a variable in Java
X* x = new X();	Invalid syntax	Declares a pointer of type X and assigns an object created (on heap)
X& x = y;	Invalid syntax	Declares a reference of type X and assigns another object which was previously created. A reference cannot be declared without initializing. The concept of reference does not exist in Java.

	DatabaseLoader databaseLoader = new DatabaseLoader();

	String q = "SELECT news, type FROM table_name

	databaseLoader.setUser("root"); // username
	databaseLoader.setPassword(""); // password
	databaseLoader.setQuery(q);

	// load the data
	Instances dataUnfiltered0 = databaseLoader.getDataSet();