Program Java Dengan Input JOptionPane Perkalian

package lat_1c;

/* @author Ahmad Firdausi*/

import javax.swing.JOptionPane;

public class Main {

    public static void main(String[] args) {

        String a, b;

        int angka1, angka2, kali;

        a = JOptionPane.showInputDialog( "Angka 1 = " );

        b = JOptionPane.showInputDialog( "Angka 2 = " );

        angka1 = Integer.parseInt( a );

        angka2 = Integer.parseInt( b );

       kali = angka1 * angka2;

       JOptionPane.showMessageDialog( null, +angka1+ "*" +angka2+ "=" + kali,  "HASIL", JOptionPane.WARNING_MESSAGE );

       System.exit( 0 );

    }

}

Program Java Dengan Matrix

package lat_matrikskali_sitimadinah;

/* @author Ahmad Firdausi */

import java.io.*;

public class Main {

    /* @param args the command line arguments     */

    public static void main(String[] args) {

        // TODO code application logic here

         DataInputStream entry = new DataInputStream(System.in);

        try

        {

            System.out.print(" INPUT JUMLAH BARIS MATRIKS 1 = ");

            int  JmlBrs1 = Integer.parseInt(entry.readLine());

            System.out.print(" INPUT JUMLAH KOLOM MATRIKS 1 = ");

            int  JmlKlm1 = Integer.parseInt(entry.readLine());

            int JmlBrs2 = JmlKlm1;

            System.out.print(" INPUT JUMLAH KOLOM MATRIKS 2 = ");

            int  JmlKlm2 = Integer.parseInt(entry.readLine());

            int [][] MatriksA = new int[JmlBrs1][JmlKlm1];

            int [][] MatriksB = new int[JmlBrs2][JmlKlm2];

            int [][] MatriksC = new int[JmlBrs1][JmlKlm2];

            for (int i=0; i<JmlBrs1; i++)

                for (int j=0; j<JmlKlm1; j++)

                    MatriksA[i][j] = (int)(Math.random()*100);

            for (int i=0; i<JmlBrs2; i++)

                for (int j=0; j<JmlKlm2; j++)

                    MatriksB[i][j] = (int)(Math.random()*100);

            for (int i=0; i<JmlBrs1; i++)

                for (int j=0; j<JmlKlm2; j++)

                {

                    MatriksC[i][j] = 0;

                    for (int k=0; k<JmlKlm1; k++)

                        MatriksC[i][j] += MatriksA[i][k] * MatriksB[k][j];

                }

            System.out.println(" \n DATA MATRIKS A = ");

            System.out.println("______________________");

            for (int i=0; i<JmlBrs1; i++)

            {

                for (int j=0; j<JmlKlm1; j++)

                    System.out.print(MatriksA[i][j] + " ");

                    System.out.println();

            }

            System.out.println(" \n DATA MATRIKS B = ");

            System.out.println("______________________");

            for (int i=0; i<JmlBrs2; i++)

            {

                for (int j=0; j<JmlKlm2; j++)

                    System.out.print(MatriksB[i][j] + " ");

                    System.out.println();

            }

            System.out.println(" \n MATRIKS " + " PERKALIAN A x B = ");

            System.out.println("_________________" + "_______________");

            for (int i=0; i<JmlBrs1; i++)

            {

                for (int j=0; j<JmlKlm2; j++)

                    System.out.print(MatriksC[i][j] + " ");

                    System.out.println();

            }

        }

        catch (Exception e)

        {

            System.out.println(" SALAH ENTRY DATA ");

        }

    }

}

Program Java Dengan Membuat Class Buku Alamat

Programnya:

class BukuAlamat

{

 String nama;

 String alamat;

 String alamatEmail;

 String noTelepon;

 int BukuAlamat;

 void cekBukuAlamat()

 {

 if (BukuAlamat==2)

 nama= "ahmad firdausi";

 alamatEmail="ahmad.firdausi@ymail.com";

 }

 void cetakAtribut()

 {

 System.out.println("Nama = "+nama);

 System.out.println("Alamat  = "+alamat);

 System.out.println("alamat Email = "+alamatEmail);

 System.out.println("no Telepon = "+noTelepon);

 }

 public static void main(String [] args)

 {

 BukuAlamat BukuAlamatNew = new BukuAlamat();

 BukuAlamatNew.BukuAlamat=2;

 BukuAlamatNew.nama="Ahmad Firdausi";

 BukuAlamatNew.alamatEmail="ahmad.firdausi@ymail.com";

 BukuAlamatNew.alamat="kp pulomangga";

 BukuAlamatNew.noTelepon="02177880191";

 BukuAlamatNew.cekBukuAlamat();

 BukuAlamatNew.cetakAtribut();

 }

 }

OutPutnya:

Java

http://www.4shared.com/document/G4p_i5Nk/JENI-Intro1-Bab03-Mengenali_Li.html