ContohPanggilPublik2.java

package contoh2;

public class ContohPanggilPublik2 {

	public static void main(String[] args) {
		Kalkulator kalkulator = new Kalkulator(10, 20);
		System.out.println(kalkulator.kali());
		System.out.println(kalkulator.bagi());
		System.out.println(kalkulator.kurang());
	}
}

Kalkulator.java

package contoh2;

//buatlah calculator menggunakan class Calculator 
//10 menit
//- dua field (number1, number2)
//- tambah, kurang, bagi, kali

public class Kalkulator {
	private int number1;
	private int number2;
	
	Kalkulator(int number1, int number2) {
		this.number1 = number1;
		this.number2 = number2;
	}
	
	public int tambah() {
		return this.number1 + this.number2;
	}
	
	public int kurang() {
		return Math.abs(this.number1 - this.number2);
//		return this.number1 >= this.number2 ? this.number1 - this.number2 : this.number2 - this.number1;
	}
	
	public double bagi() {
		double converter = this.number1;
		return converter / this.number2;
	}
	
	public int kali() {
		return this.number1 * this.number2;
	}
}