Kalkulator (sangat) Sederhana Dengan Java / NetBeans

Berikut merupakan contoh program Kalkulator Sederhana menggunakan Pemrograman Java dengan IDE NetBeans. Sangat sederhana, menggunakan BufferedReader.

package smkprogdas;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

/**
 *
 * @author ardan7779
 */
public class InputBufferedReader {

    public static void main(String args[]) throws IOException {
        
        BufferedReader ob = new BufferedReader(new InputStreamReader(System.in));

        System.out.println("Kalkulator Sederhana");
        System.out.println("==============");
        int a, b, hasil = 0;
        String operator;
        System.out.print("Masukan Nilai pertama: ");
        a = Integer.parseInt(ob.readLine());
        System.out.print("Masukan Operator Aritmatika: ");
        operator = ob.readLine();
        System.out.print("Masukan Nilai kedua: ");
        b = Integer.parseInt(ob.readLine());
        switch (operator) {
            case "+":
                hasil = a + b;
                break;
            case "-":
                hasil = a - b;
                break;
            case ":":
            case "/":
                hasil = a / b;
                break;
            case "*":
            case "x":
                hasil = a * b;
                break;
            default:
                System.out.println("Ada yang keliru..!");
                System.exit(0);
        }
        System.out.println("Hasil dari " + a + " " + operator + " " + b + " Adalah: "+hasil);
        System.exit(0);
    }

}
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