intellij idea tutorial for beginners

This tutorial will teach you Student Marks Calculation Project Java in IntelliJ IDEA.This example help will you to study Java Gui application development step by step. Design View Paste the Following Code inside the Cal Button Event int m1,m2,m3,tot; double avg; m1 = Integer.parseInt(txtMarks1.getText()); m2 = Integer.parseInt(txtMarks2.getText()); m3 = Integer.parseInt(txtMarks3.getText()); tot = m1 + m2