Operator

§  Operator adalah simbol dan karakter khusus (matematika) yang digunakan dalam suatu ekspresi

§  Contoh:

•      int x = 3;

•      int y = x;

•      int z = x * y;

•      boolean status = true;

Jenis Operator Berdasar Operand

Operator Unary: operator yang melibatkan satu operand

Operator Binary: operator yang melibatkan dua operand

Operator Ternary: operator yang melibatkan tiga operand

Jenis-jenis Operator

∂     Operator Aritmatika

∂     Operator Penugasan

∂     Operator Penggabungan

∂     Operator Increment dan Decrement

∂     Operator Bit

∂     Operator Pembanding

∂     Operator Logika

Operator Aritmatika

§  Hasil operasi matematika akan mengikuti tipe data  operand

§   Operand bertipe int akan menghasilkan int

Operator Penugasan

• Operator penugasan berguna untuk memberi nilai ke suatu variabel
• Operator penugasan menggunakan tanda sama dengan ( = )
• Operator penugasan digabungkan dengan operator aritmatika membentuk operator penugasan gabungan (compound assignment) 

Operator Penggabungan

§  Operator + dapat digunakan untuk penggabungan String dan String maupun String dan Bilangan

§  Contoh:

System.out.println(“Saya adalah” + “Mahasiswa”);

int mahasiswa = 30;

System.out.println(“Jumlah Mahasiswa” + mahasiswa);

Increment dan Decrement

§  Increment: menambahkan 1 ke nilai variabel

(operator = ++, prefix atau postfix)

int x=5;i                                                                      nt x=5;

y = x++;                                                                        y = ++x;

(nilai saat ini : y = 5, x=6)                                        (nilai saat ini: y = 6, x=6)

§  Decrement: mengurangkan 1 ke nilai variabel

(operator = --)

int  x=5;                                                                       int x=5;

y = x--;                                                                        y = --x;

(nilai saat ini: y = 5, x=4)                                         (nilai saat ini: y = 4, x=4)

Source Code Penambahan.java

/*

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 * and open the template in the editor.

 */

/**

 *

 * @author Nur Lathifah

 */

public class Penambahan {

    public static void main(String[] args){

        int x, y, z;

        x=42;

        y= x++;

System.out.println("hasil saat ini:");

System.out.println("x = "+ x +

                   " y = " + y);

        x= 42;     

        z= ++x;

System.out.println("hasil saat ini:");

System.out.println("x = "+ x +

                    " z = " + z);

    }

}

Source Code Pengurangan.java

/*

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 */

/**

 *

 * @author Nur Lathifah

 */

public class Pengurangan {

    public static void main(String[] args){

        int x, y, z;

        x=42;

        y= x--;

System.out.println("hasil saat ini:");

System.out.println("x = "+ x +

                    " y = " + y);

        x= 42;     

        z= --x;

System.out.println("hasil saat ini:");

System.out.println("x = "+ x +

                    " z = " + z);

    }

}

Source Code Penambahan2.java

/*

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 */

/**

 *

 * @author Nur Lathifah

 */

public class Penambahan2 {

    public static void main (String[] args){

        int w, x, y, z;

        w=5;

        x=5;

        y=8 - x++;

        z=8 - ++w;

    System.out.println("hasil saat ini:");

    System.out.println("w = " + w +

                       "x = " + x +

                       "y = " + y +

                       "z = " + z); 

    }

}

Source Code Pengurangan2.java

/*

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/**

 *

 * @autho Nur Lathifah

 */

public class Pengurangan2 {

     public static void main (String[] args){

        int w, x, y, z;

        w=5;

        x=5;

        y=8 - x--;

        z=8 - --w;

    System.out.println("hasil saat ini:");

    System.out.println("w = " + w +

                       "x = " + x +

                       "y = " + y +

                       "z = " + z); 

    }

}

Source Code Kali2.java

import java.util.Scanner;

/*

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 */

/**

 *

 * @author Nur Lathifah

 */

public class Kali2 {

    public static void main(String[] args){

        int x, y, z;

        Scanner scan = new Scanner(System.in);

       

        System.out.print("Masukkan angka = ");

        x = (int) scan.nextDouble();

       

        System.out.print("dan ");

        y = (int) scan.nextDouble();

       

        System.out.println("Hasil " + x + " << " + y + " = " + (x << y));  

    }

}

                 

Source Code Bagi2.java

import java.util.Scanner;

/*

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 */

/**

 *

 * @author Nur Lathifah

 */

public class Bagi2 {

    public static void main(String[] args){

        int x, y, z;

        Scanner scan = new Scanner(System.in);

       

        System.out.print("Masukkan angka = ");

        x = (int) scan.nextDouble();

       

        System.out.print("dan ");

        y = (int) scan.nextDouble();

       

        System.out.println("Hasil " + x + " >> " + y + " = " + (x >> y));   

    }

}

Source Code Pembanding.java

/*

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 */

/**

 *

 * @author Nur Lathifah

 */

public class Pembanding {

    public static void main(String[] args){

int age = 36;

boolean hasilBanding1 = age < 25;

boolean hasilBanding2 = age != 26;

                                    

System.out.println("Menampilkan Hasil Banding 1 dan 2");

                                    

System.out.println("hasil banding1 = " + hasilBanding1);

System.out.println("hasil banding2 = " + hasilBanding2);

     }

}