Thesis deals with comparison of two popular programming libraries for the creating the graphical user interface. First is Swing where it is used Java language and the second is wxWidgets in C++. The main goal of my thesis is objectively compare strong and weak points of these two libraries concerning about factors like rapidity of development, platform independent, rapidity of user interface, facility of globalization, development of new components and creation of distribution programme. This comparison can make easier the choice of library for specific project and thank to using simple and practical examples, it is easier to understand and adopt mechanism of these libraries. Thesis is divided into Swing part and wxWidgets part. Each part s...