Lesson 9. Find Max in an Array

Calculator.java

class Calculator {
    private int firstNumber;
    private int secondNumber;
    private int resultValue;
    private int array;
    private double wowSoSquare;
    private double numberBeforeSquareRootExtraction;
    private double squareRootCalcResult;
    private double angleBeforeSineCalc;
    private double sineCalcResult;

    public int getSum(int firstNumber, int secondNumber) {
        return resultValue = firstNumber + secondNumber;
    }

    public void printResult(int resultValue) {
       System.out.println("Result value: " + resultValue);
    }

    /* BEGIN methods of Math class */
    
    public double getSqrt(double numberBeforeSquareRootExtraction) {
        this.numberBeforeSquareRootExtraction = numberBeforeSquareRootExtraction; 
        return squareRootCalcResult = Math.sqrt(numberBeforeSquareRootExtraction);
    }
    
    public double getSine(double angleBeforeSineCalc) {
        this.angleBeforeSineCalc = angleBeforeSineCalc;
        return sineCalcResult = Math.sin(angleBeforeSineCalc);
    }
    
    /* Array */
    
    public void findMaxInAnArray(int[] array) {
        int max = array[0];
        for(int i = 0; i < array.length; i++){
            if(max < array[i])
                max = array[i];
        }
        System.out.println("Maximum in an array: " + max);
    }
    
    public static void main(String[] args) {
        Calculator myCalc = new Calculator(); 
        int resultValue = myCalc.getSum(10, 5);
        myCalc.printResult(resultValue);
        myCalc.getSqrt(100.0);
        myCalc.getSine(30.0);
        int [] array = {12, 1, 5, -11, 7, 13, -1, -5};
        myCalc.findMaxInAnArray(array);
        System.out.println("The square root of \"" + myCalc.numberBeforeSquareRootExtraction + "\" is: " + myCalc.squareRootCalcResult);
        System.out.println("The sine of \"" + myCalc.angleBeforeSineCalc + "\" is: " + myCalc.sineCalcResult);
    }

}