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package org.opentutorials.javatutorials.object; class Calculator{ int left, right; public void setOprands(int left, int right){ this.left = left; this.right = right; } public void sum(){ System.out.println(this.left+this.right); } public void avg(){ System.out.println((this.left+this.right)/2); } } public class CalculatorDemo4 { public static void main(String[] args) { Calculator c1 = new Calcul..
