From Java Basics like Arrays , Strings ,.....etc , with important programs for placements and minimum programs to be done for creativity.
** One tool to visualize your java code with execution for better working of program knowledge ----> https://pythontutor.com/render.html#mode=display .
** An excellent platform to practise java programs with solutions and flowcharts -----> https://www.w3resource.com/java-exercises/array/index.php .
** An excellent IDE for JAVA FULL STACK DEVELOPEMNT ---> ECLIPSE IDE !!! .