Image Learning of Charge Motion in Electric and Magnetic Fields by Java Programming

Java programs in a GUI environment have been developed for an image learning of charge motions in electric and magnetic fields. Text fields of selected parameters for the numerical calculation of the differential equations of the charge motion, such as the electric field and magnetic field, are set on the display, and the calculation by Runge-Kutta method is begun by clicking the start button after inputting values into the text fields. The calculated results are plotted immediately after the completion of the calculation as a figure on the display, e.g., a charge locus for the simulation of charge motion. By changing the values in the text fields, new results can be represented immediately, and the charge motion under a new electric and magnetic fields can be easily simulated. These Java programs are useful in education applications for rapidly and accurately image learning for the phenomena expressed by ordinary differential equations.